Rev Cutler-Hammer Smart Breaker Panel Control Manual

Transcription

1 Rev Cutler-Hammer Smart Breaker Panel Control Manual

2 640 Airport Road, Suite 04 Kennesaw, GA 3044 Phone: (770) Fax: (770) ALL RIGHTS RESERVED. The information contained in this manual has been carefully checked and is believed to be accurate. However, Computer Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein. In no event will Computer Process Controls, Inc. be liable for any direct, indirect, special, incidental, or consequential damages resulting from any defect or omission in this manual, even if advised of the possibility of such damages. In the interest of continued product development, Computer Process Controls, Inc. reserves the right to make improvements to this manual, and the products described herein, at any time without notice or obligation.

3 Table of Contents OVERVIEW..... THE CUTLER-HAMMER SMART BREAKER SYSTEM THE CUTLER-HAMMER SMART BREAKER GATEWAY THE MULTIFLEX CHB... 2 MOUNTING THE CUTLER-HAMMER SMART BREAKER GATEWAY CHB INSIDE THE PANEL POWER WIRING GATEWAY TERMINATI JUMPER SETTINGS SMART BREAKER GATEWAY POWER WIRING CHB POWER WIRING BOARD STATUS LEDS GENERAL STATUS LED TX AND RX LEDS CODE A AND B LEDS NETWORKING THE CUTLER-HAMMER BREAKER GATEWAY GATEWAY WITH SITE CTROLLER CHB WITH GATEWAY CHB DIP SWITCH SETTINGS SITE CTROLLER SOFTWARE SETUP REFLECS E2 AND EINSTEIN Board and Application Setup Adding Lighting Schedule Applications Proof Inputs and Light Outputs Setup Proof Inputs Setup Light Outputs Setup SOFTWARE SETUP SMART BREAKER GATEWAY (HHT) HHT Screens Configuration Status CHARTS/APPENDICES MAPPING BREAKER NUMBERS TO BOARD AND POINTS (BD:PT) RO MAPPING TABLE... APPENDIX A: WORKSHEETS... 2 APPENDIX B: TROUBLESHOOTING... 4 C-H Smart Breaker Manual Table of Contents vi

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6 Overview The Smart Breaker products are designed to allow CPC s family of site controllers to command control panels that activate and deactivate lights. A breaker panel generally consists of a series of circuit breakers, each of which may be flipped from OFF to and from to OFF by pulsing a DC voltage to the breaker's input. Each breaker also will have a proof checking device that can be read by a controller and used to compare the actual state of the breaker to the "virtual" state of the breaker... The Cutler-Hammer Smart Breaker System CPC s Cutler-Hammer Board (CHB) is used to interface a Cutler-Hammer Breaker Panel to CPC s family of site controllers. Because each CHB behaves as three 6AI and six 8RO boards, and because CPC site controllers have a limited number of 6AIs and 8ROs, it is possible for installations with many breakers to exceed a single controller's I/O limit. The C-H Smart Breaker Gateway allows you to drive multiple CHB points from a single I/O point, and logically combine multiple proof values from CHB inputs into a single proof value. The Gateway allows you to control as many as four C-H panels with up to 42 breakers per panel (maximum of four CHBs) with a single device that behaves as one 6AI and two 8RO boards on the site controller network. Each virtual output point of the Gateway may be mapped to one or more individual breakers controlled by its associated CHBs..3. The MultiFlex CHB The MultiFlex CHB provides both the voltage necessary to change the breaker state and the proof value to verify the state change. Because as many as 42 individual breakers may be installed in a single CH lighting panel, one board per panel may be necessary. Each MultiFlex CHB may be connected to an E2, Einstein, or REFLECS controller using the RS485 I/O Network (for E2 or Einstein) or COM A&D (REFLECS). The CHB behaves identically to three 6AI board and six 8RO boards. 2 Mounting BREAKER INPUT +2VDC PULSE = CHANGE OF STATE BREAKER LIGHTS PROOF OUTPUT Panel Panel 2 Panel 3 Panel 4 (42 Breakers) (42 Breakers) (42 Breakers) (42 Breakers) MultiFlex CHB MultiFlex CHB MultiFlex CHB MultiFlex CHB INPUT TERM MULTIFLEX CHB CHB OUTPUT Gateway Board I/O Network TERM Figure - - C-H Smart Breaker System Layout (Overview).2. The Cutler-Hammer Smart Breaker Gateway CPC Controller Figure 2- - Typical Layout of Panels, Gateway, and Controller 2.. The Cutler-Hammer Smart Breaker Gateway The Gateway is typically mounted in the same area as the site controller, near the controller s 6AI, 8RO, and other RS485 Network peripherals. The Gateway is de- C-H Smart Breaker Manual Rev

7 5A/25V 2A/250V signed to fit into a standard 3" snap track (supplied with the board) or may be mounted in a panel or on stand-offs. Follow the dimensions in Figure 2-2 for panel mounting. Figure Gateway Board Mounting Dimensions The Gateway should be mounted in an environment with ambient temperature between -40 F and 50 F, with a non-condensing relative humidity between 5% and 95%. Gateway boards are not supplied with an enclosure but come with a snap-track for easy installation. The insulation sheet and I/O board must be removed from the track before the track is mounted. The snap-track is mounted using the mounting slots. Figure 2-3 shows this installation procedure. Figure Snap-Track Installation 2.2. CHB Inside the Panel Connector Strip Cutler-Hammer Board (CHB) Mounting Hole Battery Enabler. Set to the UP position to enable. 8RO Address Connector Strip 6AI Address and Baud Rate Set Jumpers JP4-6 UP for termination Breaker Control Power F6 Set Jumpers JP2-3 UP JP7 for temperature inputs TX LED Set Jumpers JP2-3 DOWN for light level (transmit) RX LED (receive) Set Jumpers JP4-6 DOWN for non-termination (default position) JP4JP5JP6 CHB Power F5 Code A LED (flashes at a certain rate if the board is offline) Gen Status LED (heartbeat) Mounting Hole JP2 JP3 (Input ) (Input 2) +2V+5V Power Out Sensor Power 0v Sig 0v Sig Sensor Inputs Input Input v 485- I/O Network Figure 2-4 Cutler-Hammer Board Layout CHB Inside the Panel Mounting 2

8 Use mounting holes to screw board in place CHB Push down on connector strips to secure board v 485- I/O Network High-line voltage cover plate 28 VAC OFF Secondary control power transformer Power 28VAC secondary power switch wiring knock outs SHIELDED TWISTED PAIR BELDEN #876 OR EQIV. Wire + to + Wire 0v to 0v (shield) Wire - to v 485- I/O Network TO OTHER RS485 DEVICES TO OTHER RS485 DEVICES Use either knock out Figure CHB Mounting Layout (Inside Panel). Loosen screw and open the cover plate lid. 2. Flip the 28VAC Secondary Power switch to the OFF position. 3. Unscrew the cover plate and remove from the panel. 4. Mount the CHB by lining up the mounting holes and pressing down on the connector strips at each end of the board. Insert screws into the mounting holes and tighten down to fasten board in place. For more details, refer to 5. Once the CHB is in place, set the 8RO and 6AI address switches (refer to Section 5.3., CHB with Gateway). 6. Set the termination jumpers JP4-6 (UP if at the end of a daisy chain). 7. Connect board to the RS485 Network (refer to Section 5.3., CHB with Gateway). 8. Reinstall the cover plate. 9. Flip the 28VAC Secondary Power switch to the position. (28VAC control power wires must be connected in order to cycle a breaker.) 3 C-H Smart Breaker Manual Rev

9 24VAC POWER 3 Power Wiring 3.. Gateway Termination Jumper Settings TERMINATI RS485 RECEIVER BUS TERM JUMPERS RS485 RECEIVER BUS NETWORK (TO GATEWAYS AND RECEIVERS) Connect 24VAC center-tapped power to the connector indicated in Figure 3-2 #9. Note that the center tap should be earth grounded and connected to the 0v center position of the plug CHB Power Wiring Old-Style The old-style MultiFlex CHB two-board solution requires 24VAC non-center tapped power. Power wiring is the same as the MultiFlex 68 board (refer to Figure 3-3). For the last CHB on the Receiver Bus Network, set the termination jumpers to the terminated position (left), and for all other CHBs leave the termination jumpers in the no termination position (right). NO TERMINATI Figure 3- - Gateway Termination Settings The Receiver Bus is always at one end of the CHB network daisy chain, therefore jumpers should be set in the termination position. If the Gateway resides at one end of the I/O Network, set the I/O Net termination jumpers to the terminated position, otherwise leave in the no termination position Smart Breaker Gateway Power Wiring LEGEND Hand-Held Terminal Jack 7 Alarm Status LED 2 RS485 I/O Network 8 Dip Switch 3 RS485 Receiver Bus Net 9 Power Connector 4 I/O Net Term Jumpers 0 I/O Net Status LED 5 Receiver Bus Term Jumpers Receiver Bus Status LED 6 General Status LED Rx LED Tx LED JP2 JP3 JP4 8RO Addr 6AI Addr 0v SIG INPUT Figure Old-Style MultiFlex CHB New-Style S3 & S4 Network Address Power Termination Jumpers Code A LED Code B LED Gen Status LED (heartbeat) +2V +5V 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7 INPUT 8 POWER OUT 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG 0v SIG INPUT 9 INPUT 0 INPUT INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 Note that the new-style CHB single board solution does not require external power (refer to Figure 2-4). The breaker board has two 64 pin connectors on the back. Those connectors plug directly into the Cutler-Hammer circuit breaker panel, and provide 28VAC (one side grounded) power and all input and output connections to control the circuit breakers. The CHB circuit common will be grounded to the metal chassis of the Cutler-Hammer panel. The breaker board has two mounting holes for #8-32 screws, one above the other, approximately centered left and right. The board functions as I/O points for three 6AI boards and six 8RO boards to an E2 or Einstein. Most installations of CHB will require the RS485 Network wiring to the controller or a Smart Breaker Gateway. +5V+5V MultiFlex CHB Figure Gateway Board Gateway Termination Jumper Settings Power Wiring 4

10 Gateway DAISY CHAIN CFIGURATI SET TERMINATING JUMPERS: RS485 I/O NET (TO CPC CTROLLER) CHB CHB CHB CHB UP DOWN DOWN DOWN UP Figure Connecting Gateway to the RS485 Network 4 Board Status LEDs When a MultiFlex board is powered up, you will be able to determine the operating status of the board by observing its status LEDs. Figure 3-3 shows the location of the CHB s status LEDs. 4.. General Status LED The Gen Status LED simply blinks GREEN once per second (heartbeat) to show that the board is powered and operational. If this light is dark, the board has likely lost power Tx and Rx LEDs WIRE + to + WIRE 0V to 0V WIRE - to - WIRE + to + WIRE 0V to 0V WIRE - to - SHIELDED TWISTED PAIR BELDEN #876 OR EQUIV. TO OTHER RS485 DEVICES TO OTHER RS485 DEVICES The Tx and Rx LEDs indicate when the CHB is sending or receiving messages on the RS485 Network. The Tx LED blinks once every time the CHB sends a response to the E2, Einstein, or REFLECS. The Rx LED blinks once when the CHB receives a message. If the CHB is connected to the network and set up to communicate with the controller, you should see these lights blinking regularly. If they do not, there may be a problem with the network. TO CHB DEVICES SHIELDED TWISTED PAIR BELDEN #876 OR EQUIV Code A and B LEDs Code A and Code B LEDs indicate failure conditions. When these LEDs are OFF, there are no failures active. When one or both of these LEDs are blinking, there are failure conditions. The rate of blinking indicates the type of failure: Code A Failure Conditions Blinking fast (4 times/second) - There is a problem with the flash memory or hardware clock on this board. This generally means the board is bad and must be replaced. Blinking slow ( time/second) - The board is not receiving any messages addressed to it. This means either the I/O Network is down or it has not yet been commissioned in the E2, Einstein, or REFLECS Network Configuration screen. Code B Failure Conditions NOTE: Code B LED is not used on the New- Style CHB. 5 Networking 5.. The Cutler-Hammer Breaker Gateway The breaker may be connected to a CPC controller using a Gateway Board. The Gateway Board is a special interface device that allows CPC s E2, Einstein, or REFLECS site controllers to communicate with up to four MultiFlex C-H boards (CHB), as if each of them were a standard 6AI Analog Input board and two 8RO Boards. The CHB allows for group programming with the CPC Hand-Held Terminal (HHT). In addition to being an interface with the site controller, the Gateway Board also allows you use a CPC Hand-Held Terminal (HHT) device to program the CHB and program to set up the Group association for the breakers of each panel. Groups provide I/O point association between the panel breakers and the site controller. 5 C-H Smart Breaker Manual Rev

11 Gateway with Site Controller The Gateway communicates with the CPC site controllers (E2, Einstein, or REFLECS) via the RS485 I/O Network (COM A & COM D for REFLECS). The Gateway is one physical RS485 load on the I/O Network that simulates one 6AI and two 8RO Boards. To connect the Gateway to the CPC RS485 I/O Network, locate the I/O Network connector and remove it from the circuit board. Secure the wire leads to the connector orienting them as shown in Figure 3-4. When you are through securing the connections, carefully plug the connector back onto the circuit board. Wire the Gateway RS485 port in a daisy chain as all other I/O Network devices. The Gateway termination jumpers should be set to the termination position if it is at the end of the daisy chain CHB with Gateway The Gateway Board communicates with the C-H Breaker units via the Receiver Bus Network. The receiver bus may be connected to a maximum of four CHBs. Each panel has up to 42 breakers and one CHB to control these breakers. To connect the Gateway to CHB, locate the receiver bus connector and remove it from the circuit board. Secure the wire leads to the connector orienting them as shown in (Figure 3-4). When you are through securing the connections, carefully plug the connector back onto the circuit board. Then daisy chain the receiver bus to the 485 connector of each CHB. A maximum of four CHBs can be connected to a Gateway. The Gateway and the last CHB on the network should have the termination jumpers set in the terminated position. 6 CHB Dip Switch Settings ADDRESS POSITI -5 NETWORK ADDRESS (-3) POSITI 6-7 BAUD RATE (9600 or 9200) BOARD BOARD 2 BOARD 3 BOARD 4 BOARD 5 BOARD 6 BOARD 7 BOARD 8 BOARD 9 BOARD 0 BOARD BOARD 2 BOARD 3 BOARD 4 BOARD 5 BOARD 6 BOARD 7 BOARD 8 BOARD 9 BOARD 20 BOARD 2 BOARD 22 BOARD 23 BOARD 24 BOARD 25 BOARD 26 BOARD 27 BOARD 28 BOARD 29 BOARD 30 BOARD BAUD RATE 9600 BAUD Figure 6- - CHB Dip Switch Settings for Network Address and Baud Rates Set 6AI address (max range -6) and 8RO address (max range -3) using Figure 6-. Use the 6AI dip switch to set the baud rate address BAUD Each CHB functions as three 6AI boards and six 8RO boards. For each panel, use Table 5- to set the 6AI and 8RO starting addresses for each CHB. For the location of the 6AI and 8RO address dip switches, refer to Figure 3-3 for the Old-Style CHB, and Figure 2-4 for the New-Style CHB. These addresses are set the same as a standard MultiFlex board. Panels 6AI 8RO Table AI and 8RO Starting Addresses Gateway with Site Controller CHB Dip Switch Settings 6

12 7 Site Controller Software Setup 7.. REFLECS Each group set up in the Gateway has its own virtual 8RO and 6AI point command of the relay and proof feedback (respectively). Refer to your controller s manual for set up instructions E2 and Einstein Board and Application Setup Set up the number of boards (one 6AI and two 8ROs) on the I/O Network from the Connected I/O screen. Press the key to open the Main Menu and press:. System Configuration 2. Network Setup 3. Connected I/O Boards and Controllers If using an Einstein controller, from the Main Status/ Home screen, press (Actions), Network Status/ Setup, and then Connected I/O Boards & Controllers Adding Lighting Schedule Applications For each group of breakers to be controlled separately, set up a Lighting Schedule application from the Add New Application screen.. Add/Delete Application 2. Add New Application 3. LOOK UP to select Lighting Control. Enter the number of desired applications in the How Many? field. If using an Einstein controller, from the Home screen or Enhanced Lighting Status screen, press (Actions), (Control Appl Setup), and then (Add Control Application). Press (Look Up) to select Enhanced Lighting. Press (Home) to return to the Home screen. TRY THIS: When creating a name for your Lighting application, incorporate the application s corresponding group number into the name. For example, PARKLIGHTS0 associates the parking lot breakers with Group. Figure 7- - Connected I/O Boards Screen Add one 6AI and two 8RO boards on this screen and press to save and exit. 7 C-H Smart Breaker Manual Rev

13 Proof Inputs and Light Outputs Setup Once the Lighting Schedule applications have been added, set up the proof inputs and light outputs for each Lighting application. The outputs of a Lighting Schedule cell control the breakers on the Cutler-Hammer panels, and the inputs are the combined proofs of all the breakers that are part of the group being controlled by the application Proof Inputs Setup Set up 6AI board inputs in Proof Setup. To enable proofing, set Enable Proofing to Yes for each Lighting application by accessing the Lighting Control Setup screen. From the Main Menu:. Press (Lighting Sched) and select the a Lighting application. 2. (Setup) to go the Setup screen for that Lighting application. If using an Einstein controller, from the Home screen or Enhanced Lighting Status screen, press (Actions), (Setup), and choose the S:Setup tab. (Note that the Proof tab is S8 and the Outputs tab is S9). Figure Lighting Proof Setup Screen 5. Set Proof Type to Only. If the light circuit is read as open when it should normally be closed, the 6AI board will send a "fail" input relay to the controller. The Gateway proofs both and OFF so that the user can select the desired proof type as ALL Values, Only, or OFF Only. If any breaker within a group fails the proof, the entire group will fail the proof. 6. In the PROOF IN input, enter the virtual board and point address of the proof input on the gateway for the lighting group. 7. Set Proof Delay to a minimum of two minutes. (0:02:00) NOTE: Cycling power to all 42 breakers can take up to 6.5 minutes. 8. Press (Next Tab) or (Prev Tab) to cursor over to C:9 Outputs tab. Figure Setup Lighting Control 3. Under the C:Setup tab, set Enable Proofing to Yes. (C8:Proof tab becomes visible once you cursor across the tabs. See Figure 7-3.) 4. Press (Next Tab) or (Prev Tab) to cursor over to C8:Proof tab. NOTE: If a breaker is assigned to a group that is not set up, a proof failure message will occur Light Outputs Setup The Lighting Outputs Setup screen is where you will set up the 8RO board and point numbers for each group for all Lighting applications. Refer to Table 9- to associate the inputs and outputs with their corresponding group, board and point numbers. E2 and Einstein Site Controller Software Setup 8

14 Figure Lighting Outputs Setup Screen For more information on setting up Lighting Schedules, refer to section 9.7 Lighting Schedules in the E2 RX Refrigeration and BX HVAC I&O Manual. 8 Software Setup 8.. Smart Breaker Gateway (HHT) Connect the HHT to the Gateway board via the HHT jack (refer to figure Figure 3-2 #). Use the HHT to assign individual breakers to a particular group. F F2 HHT Keys Cancel Enter 8... HHT Screens Function Home screen key Quick access to status information Left and right arrow keys point to the desired field to be configured Up and down arrow keys scroll through all breakers on panel screens Deletes number you have chosen and changes it to zero, and cancels overrides on selected field Saves changes (optional - use the down arrow) - Toggles between override and OFF. Toggles between override and OFF Table 8- - HHT Key Functions The Home screen is the first screen that appears. Press F at any time to return to the Home screen. CPC - CH SB GW VER:.00A03 (PRESS ) Figure 8- - Home Screen Press the down arrow key to move to the Starting Board Addresses screen. 6AI ADDR: 8RO ADDR: Figure Starting Board Addresses Screen The Gateway emulates one 6AI and two 8ROs on the I/O Network. Set the 6AI and 8RO addresses using the left or right arrow keys to activate the corresponding fields, and number the boards accordingly. The 6AI address should be the first unused board number with a valid range of - 6. The 8RO should be the next available 8RO I/O Network address with a valid range of C-H Smart Breaker Manual Rev

15 For example, if you currently have three 6AIs and six 8ROs, set the 6AI address to 4 and the 8RO address to 7. If you add a 6AI and 8RO after the Gateway, set their addresses as follows: 6AI to 5 and the 8RO to 9. Next, arrow down to the Option screen. Figure Option Screen Option No. OPTI: 3 = STATUS 2= DIAGS 3= CFIG Configuration Function Status information that can be overridden. (An asterisk "*" signifies a proof failure) 2 Diagnostics for troubleshooting 3 Configuration settings Table Option Choices Chart Use the left or right arrows to activate the OPTI: field and choose the desired option number. (Select 3 to start configuring each Panel s breakers to groups.) Press the down arrow to move to the next screen Status NOTE: If a breaker is assigned to a group that is not set up, a proof failure message will occur. From the Option screen, select for Status. The Status screen shows the status of the 6 groups and shows the or OFF state of each group and any proof failures (a proof failure is indicated by "*" after the or OFF state). Press the down arrow key to scroll through the groups. After the groups are displayed, continue pressing the down arrow key to see the or OFF state and any proof failures of each of the 42 breakers and all panels. If a group is not assigned or set to zero, a "-" will appear as the breaker status. OPTI: = STATUS 2= DIAGS 3= CFIG Figure Option Screen PANEL BRK GRP BRK 2 GRP BRK 3 GRP Figure Panel Breakers to Group Screen From this screen you can begin assigning breakers on panels through 4 to breaker groups. Refer to Table A- for a diagram of the breaker panel and the breaker number to group assignment. Use the left and right arrow keys to configure the breaker s group number. Change the group number to the group you want to associate the breaker with (a maximum number of 6). A group number field becomes active when you see the arrow appear next to the number. Use the down arrow key to scroll through all 42 breakers on each of the four panels and set the group numbers as you scroll through the breakers. Smart Breaker Gateway (HHT) Software Setup 0

16 9 Charts/Appendices 9.. Mapping Breaker Numbers to Board and Points (Bd:Pt) Up to a maximum of 6 groups can be set up, but an unlimited amount of breakers can be assigned to any given group. Y represents the 6AI address and X represents the 8RO address of the Gateway configured in Section 8..., HHT Screens as shown in Figure RO Mapping Table Table 9-2 shows how the outputs of the 8RO Board are connected to group numbers. 8RO Board # 8RO Board Outputs 8 Outputs Outputs 9-6 Table RO Mapping Associated Group Number Light Schedule Group Proof In (Bd) 6AI Addr Proof In (Pt) 6AI Points Lights Output (Bd) 8RO Addr Y X 2 Y 2 X 2 3 Y 3 X 3 4 Y 4 X 4 5 Y 5 X 5 6 Y 6 X 6 7 Y 7 X 7 8 Y 8 X 8 9 Y 9 X+ 0 Y 0 X+ 2 Y X+ 3 2 Y 2 X+ 4 3 Y 3 X+ 5 4 Y 4 X+ 6 5 Y 5 X+ 7 6 Y 6 X+ 8 Table 9- - Mapping Group Numbers to Point Numbers Lights Output (Pt) 8RO Points C-H Smart Breaker Manual Rev

17 Appendix A: Worksheets Use the workspace below to assign breakers to groups. Refer to Table A-2 for group number board and point assignment. Panel Breakers Panel 2 Breakers Panel 3 Breakers Panel 4 Breakers Group# Group# Group# Group# Group# Group# Group# Group# Table A- - Assigning Breakers to Group Numbers

18 6AI Address = Fill in the Gateway 6AI board address that you set with the HHT. 8RO Address = Fill in the Gateway 8RO board address that you set with the HHT for Groups -8. For Groups 9-6, use the next consecutive 8RO board address (add ). Light Schedule Group Proof In (Bd) 6AI Addr Proof In (Pt) 6AI Points Lights Output (Bd) 8RO Addr Table A-2 - Mapping Group Numbers to Point Numbers Lights Output (Pt) 8RO Points Group Name

19 Appendix B: Troubleshooting SYMPTOM POSSIBLE PROBLEM SOLUTI Board Offline I/O Network Problems Check wiring polarity. Verify the 485+ uses one color and the 485- uses the other color throughout the network. Check each connector for any loose wires or frayed strands between connectors. Termination Jumpers Set Incorrectly Board Not Receiving Power Verify all three jumpers are set in the UP position if the board is at the end of a daisy chain, and that all other boards are not terminated (jumpers in DOWN position). Refer to Figure 2-5 for the following steps:. Verify proper transformer wiring. Check that the 28 VAC secondary switch is in the position. 2. Verify that the secondary power is 28 VAC and the wires are connected properly. 3. Check Fuses F5 and F6. 4. Verify line voltage is connected to high-line side of the control power transformer. Dip Switches Set Incorrectly Check 8RO address, 6AI address, and baud rate settings. Refer to Section 5.3., CHB with Gateway and Section 6, CHB Dip Switch Settings. Note: after changing dip switch settings, cycle power to board using the 28 VAC secondary power switch (flip to the OFF position and then to the position).

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