E3FS. Connect up to 4 sets of E3ZS/E3FS per B1 Module for F3SX Safety Controller

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1 Single-beam Safety Sensor Type 2 Safety Photoelectric Sensor for Hazardous Gaps in Machines Note: Be sure to read the Safety Precautions International standards: IEC6496- (type 2 ESPE) IEC (type 2 AOPD) European standards: EN6496- (type 2 ESPE) peen (type 2 AOPD) Connect up to 4 sets of E3ZS/E3FS per B Module for F3SX Safety Controller Note: The B Module is designed specifically for E3ZS/E3FS input of the F3SX. - The safety output turns when light is interrupted or when an error occurs with one or more of the E3ZS/E3FS Sensors connected to the B Module. E3FS E3ZS F3SX B Module for the F3SX (F3SX-EB shown here) Curtains E3ZS E3FS E3FS Connects simply and easily using a wide range of accessories. Dummy plug E3FS-B4 2M For unused E3ZS/E3FS Sensor connectors E3ZS-T8A F3SX-EB shown With Right-angle Connectors With Right-angle Connectors E3FS-B4-M-M BB-25

2 Applications E3ZS/E3FS For gaps in small-sized equipment E3ZS Protect personnel from the hazards of gaps in smallsized equipment or of semi-automated machinery. Curtains The E3ZS is a Human Body Detection Sensor (Type 2) for production equipment. Make sure to use it in combination with an F3SX Safety Controller. When used by itself, the E3ZS conforms to EN954- (Category ). No particular safety restrictions apply to the E3ZS when used by itself, except the inability to use in human detection safety applications. We recommend using it in Light ON mode with error detection via test input. * Test input Use this function to enable the E3ZS to be turned ON/ from outside the emitter. It is possible to detect a number of E3ZS errors by monitoring the status of the test input and the E3ZS output signal. For gaps in small- to medium-sized equipment E3FS Use as in safety a safety measures measure for for protection protection from from hazardous hazardous gaps or in as guards guards for for medium-sized medium-sized equipment. equipment. The E3FS is a Human Body Detection Sensor (Type 2) for production equipment. Make sure to use it in combination with a F3SX Safety Controller. A combination of E3FS and E3ZS Sensors can be connected to the B Module of the F3SX. * Since the E3FS has not received any safety certification for use by itself, make sure to connect it with an F3SX for use in safety applications. BB-26

3 Ordering Information Sensors Red light Infrared light Sensing method Appearance Case material Connection method Sensing distance Output Model Polybutylene terephthalate.2 to 3m E3ZS-T8A Pre-wired cable (2m) Throughbeam ABS m PNP E3FS-B4 2M Brass Controller Instant Breaking Models F3SX-N- R (with Relay Safety Output) M2 connector m E3FS-B4-M-M Curtains E3FS Safety Sensors Input types F3SN/F3SH Safety Light Curtains Emergency Stop Switches Instant Breaking Models F3SX-E- (with DC Solid-state Safety Output) Door Switches Instant Breaking Models F3SX-E- R (with Relay Safety Output and DC Solid-state Safety Output) -delay Time Setting Models (Using Function Setup Software for the F3SX) F3SX-N- RR2 (with Relay Safety Output and DC Solid-state Safety Output) Model Width (W) Weight F3SX-N-BR 9. mm Approx..5 kg F3SX-N-BDR 2.5 mm Approx..6 kg F3SX-N-BDDR 35. mm Approx..7 kg F3SX-N-L2BR 2.5 mm Approx..6 kg E3FS Safety Sensors Input types F3SN/F3SH Safety Light Curtains Emergency Stop Switches Door Switches Model Width (W) Weight F3SX-EB 45. mm Approx..3 kg F3SX-E-BB 67.5 mm Approx..4 kg F3SX-E-BD 67.5 mm Approx..4 kg F3SX-E-L2B 67.5 mm Approx..4 kg E3FS Safety Sensors Input types F3SN/F3SH Safety Light Curtains Emergency Stop Switches Door Switches Model Width (W) Weight F3SX-E-BR 9. mm Approx..5 kg Input types E3FS Safety Sensors F3SN/F3SH Safety Light Curtains Emergency Stop Switches Door Switches Model Width (W) Weight F3SX-N-BDRR mm Approx..7 kg F3SX-N-L2BRR mm Approx..7 kg -delay Time Setting Models (Using Function Setup Software for the F3SX) F3SX-E- R2 (with Relay Safety Output and DC Solid-state Safety Output) BB-27

4 E3FS Safety Sensors Input types F3SN/F3SH Safety Light Curtains Emergency Stop Switches Door Switches Model Width (W) Weight F3SX-E-BR2 9. mm Approx..5 kg F3SX-E-BDR2 2.5 mm Approx..6 kg F3SX-E-L2BR2 2.5 mm Approx..6 kg The F3SX-series Safety Controller is is a multiple input, single output Controller. This is useful for individual control over the safety output output when when using using multiple multiple safety safety input devices. devices. Custom Custom models models are are also also available. available. Refer Refer to to the the F3SX F3SX Safety Safety Controller Controller catalog catalog provided separately, and consult with your OMRON representative. (Cat. No. Z96) provided separately, and consult with your OMRON representative. Accessories Branch Connector Mounting Bracket Curtains Appearance F39-CN3 Model Appearance Y92E-B8 Model Dummy Appearance Model Sensor Mounting Bracket (For E3ZS) Appearance Model Standard price (yen) F39-CN4 E39-L4 325 Cables with Connectors on Both Ends for Branch Connector Appearance Model Cable length F39-JFS m F39-JF2S 2 m F39-JF5S 5 m F39-JFS m Mutual Interference Prevention Filter (For E3ZS) Appearance/Dimensions Model Quantity Remarks E39-E 2 per emitter and receiver (4 total) For use with E3ZS-T8A. This filter prevents mutual interference by changing the direction of polarized light of the 2 adjacent emitter/ receivers. However, when the filter is attached, the maximum sensing distance of the E3ZS is reduced to.5 m. BB-28

5 Cables with Connectors (Socket and Plug) on Both Ends Cable connection Cable length DC Type direction L (m) Model XS2W-D42-C8-A Standard cable Robot cable (vibration resistant) Straight/straight Right angle/right angle Straight/right angle Right angle/straight Straight/straight 2 XS2W-D42-D8-A 5 XS2W-D42-G8-A XS2W-D42-J8-A 2 XS2W-D422-D8-A 5 XS2W-D422-G8-A 2 XS2W-D423-D8-A 5 XS2W-D423-G8-A 2 XS2W-D424-D8-A 5 XS2W-D424-G8-A XS2W-D42-C8-R 2 XS2W-D42-D8-R 5 XS2W-D42-G8-R XS2W-D42-J8-R Note: Overall cable length for an E3FS connected to an E3FS through an F3SX must be within 5 m. Cables with Connector (Socket) on One End Cable connection Cable length DC Type direction L (m) Model XS2F-D42-C8-A 2 XS2F-D42-D8-A Straight 5 XS2F-D42-G8-A XS2F-D42-J8-A Standard cable XS2F-D422-C8-A 2 XS2F-D422-D8-A Right angle 5 XS2F-D422-G8-A XS2F-D422-J8-A XS2F-D42-C8-R 2 XS2F-D42-D8-R Straight 5 XS2F-D42-G8-R Robot cable XS2F-D42-J8-R (vibration resistant) XS2F-D422-C8-R 2 XS2F-D422-D8-R Right angle 5 XS2F-D422-G8-R XS2F-D422-J8-R Note: Overall cable length for an E3FS connected to an E3FS through an F3SX must be within 5 m. UL standard l --- UL standard l --- Curtains BB-29

6 Connector Plug Assemblies, Solder Type Applicable cable diameter (mm) Cable connection direction Connection method Model 3 dia. (3 to 4 dia.) Straight Right angle Solder XS2G-D425 XS2G-D426 Connector Plug Assemblies, Screw-on Type Applicable cable diameter (mm) Cable connection direction Connection method Model 3 dia. (3 to 4 dia.) Straight Right angle Screw-on XS2G-D4S5 XS2G-D4S6 Accessory Connection Example Curtains (E3FS-B4-M-M) (E3FS-B4-M-M) (E3FS-B4-M-M) Single-beam Safety Cable with Connectors on Both Ends (XS2W-D42-8- ) Single-beam Safety Sensor Sensor with Branch Connector for the E3FS (F39-CN3) A B C Cable with Connectors on Both Ends (XS2W-D42-8- ) First Sensor Connector Second Sensor Connector Cable with Connectors on Both Ends for Single-beam Safety Sensor Branch Connection (F39-JF S) B Safety Controller (F3SX) Note : The Connector is supplied with the F3SX. Note 2: Connect an F39-CN4 Dummy Plug to unused Single-beam Safety Sensor Connectors. Fourth Sensor Connector Third Sensor Connector Cable with Connector (Socket) on One End (XS2F-D42-8- ) Connector Plug Assembly (XS2G-D4 ) A B C * Cable with Connectors on Both Ends for Single-beam Safety Sensor Branch Connection (F39-JF S) may also be used. Connector Plug Assembly (XS2G-D4 ) (E3FS-B4-2M) Branch Connector for the E3FS Singlebeam Safety Sensor (F39-CN3) (E3FS-B4 2M) (E3FS-B4-2M) or (E3ZS-T8A) BB-3

7 Ratings and Performance Item Model E3ZS-T8A E3FS-B4 2M E3FS-B4-M-M Sensing method Through-beam Case material Polybutylene terephthalate ABS Brass Connection method Pre-wired cable (2 m) M2 connector Controller F3SX Series Supply voltage 2 to 24 VDC % (ripple p-p % 24 VDC % (ripple p-p % max.) max.) Effective aperture angle (EAA) 5 (at 3 m) Current consumption : 5 ma max. : 2 ma max. :5 ma max. :25 ma max. Sensing distance.2 to 3m to m Standard sensing object Opaque object: Min. 8 mm diameter Opaque object: Min. mm diameter Response time. ms (E3ZS only) *2 2. ms (E3FS only) *2 Control output Switching element category (from IEC ) Test input () PNP transistor output, load current: ma max. Residual voltage: V max. (when load current is less than ma) Residual voltage: 2 V max. (when load current is between and ma) (except for voltage drop due to cable extension) DC3 (control of electromagnetic load) 22.5 to 24 VDC: (source current: 3 ma max.) Open or to 2.5 V: ON (leakage current:. ma max.) PNP transistor output, load current: ma max. Residual voltage: 2 V max. (except for voltage drop due to cable extension) to 24 VDC: (source current: 3 ma max.) Open or to 2.5 V: ON (leakage current:. ma max.) Startup time after power ON ms Incandescent lamp: 3 lx max. (light intensity on the receiver surface) Ambient light intensity Sunlight:, lx max. (light intensity on the receiver surface) Ambient temperature Operating: - to +55 C Storage: - to +7 C (with no icing or condensation) Operating: -2 to +55 C Storage: -3 to +7 C (with no icing or condensation) Ambient humidity Operating: 35% to 85%, storage: 35% to 95% (with no icing or condensation) Insulation resistance 2 M min. (at 5 VDC) Dielectric strength VAC 5/6 Hz min Malfunction to 55 Hz, double amplitude:.5 mm, 2 h each in the X, Y, and Z directions Vibration resistance to 55 Hz, double amplitude:.7 mm, 5 min each in the X, Y, and Z directions Operating limit Malfunction 5 m/s 2 (approx. 5 G), 3 times each in the X, Y, and Z directions Shock Operating resistance m/s limit (approx. G), times in the X, Y, and Z directions Degree of protection IP67 (IEC standard) Light source Red LED (66 nm) Infrared LED (87 nm) Operation indicators Protection Weight (in packaging) Applicable standard Sensor only When connected with F3SX : Emitting (orange) : Operating (orange), Stable (green) : Emitting (orange) : Output ON (green), Output (red) Power supply/output reverse connection protection, load shortcircuit protection Output reverse connection protection, load short-circuit protection Approx. 2 g ( set, including 2-m cable) Approx. 5 g ( set, including 2-m cable) Approx. 25 g ( set, Sensor only) IEC (PDF-D) EN954- (Category ) IEC (EN) Type 2 ESPE *3 IEC (pren) Type 2 AOPD *4 EN954- (Category 2) IEC (EN) Type 2 ESPE *3 IEC (pren) Type 2 AOPD *4 Accessories Operation manual (*5) Operation manual (*5), nuts for mounting emitter/receiver (2 each) Curtains. Connect the Sensor to an F3SX to use it as a safety device or as part of a safety system. *2. *2: This may vary according to the F3SX model connected to the Sensor. For details, refer to the F3SX operation manual. *3. Electro-Sensitive Protective Equipment *4. Active Opto-electronic Protective Device *5. The F3SX operation manual is not included. BB-3

8 E3ZS Parallel Operating Range Mutual Interference Range Excess Gain Ratio Operating position Y (mm) Y X Mutual interference range (mm) Y X Excess gain ratio (times) - - Curtains Distance X (m) Distance X (m) Distance (m) E3FS Parallel Operating Range Mutual Interference Range Excess Gain Ratio Operating position Y (mm) Y X Mutual interference range (mm) Y X Excess gain ratio (times) Distance X (m) Distance X (m) Distance (m) BB-32

9 I/O Circuit Diagrams E3ZS Circuit Diagrams (E3ZS-T8A with PNP Output) Output mode: ON when light is incident (Light ON) I/O circuit Timing Charts Output Modes and Timing Chart Light incident Light interrupted Stability Operation Brown indicator indicator 24 VDC terminal. Green Orange 2 *2 Pink Main 4 circuit control output terminal. Black Emission indicator Orange Main circuit 3 VDC terminal. Blue Brown 24 VDC terminal. Pink 4 *3 Blue 3 test input terminal. VDC terminal. Operation ON indicator (orange) Control output ON Timing Chart Test input Emission ON ON ON Indicator (orange) Note: The F3SX performs a self-diagnosis every 2 ms. Curtains. When using in Safety Category 2 configurations, make sure all terminals on the B Module of the F3SX are properly connected. Do not connect the terminals to another module. See the F3SX operation manual for details. *2. Make sure to connect the pink wire (mode selection input 2) to 24 VDC. *3. Make sure to connect to the V terminal when the E3ZS is not connected to an F3SX and the test input is not used. E3FS Circuit Diagrams (E3FS-B4 with PNP Output) Output mode: ON when light is incident (Light ON) I/O circuit Timing Charts Output Modes and Timing Chart Light incident Light interrupted Lit when ON Green Red Lit when Lit when emitting Main circuit Brown 24 VDC terminal. 2 *2 Pink 4 Internal control output terminal. Black resistance of the output IC 3 V terminal. Blue Brown 24 VDC terminal. Operation indicator Control output Red Timing Chart Test input Emission Operation indicator (orange) ON ON ON Orange Main circuit Pink 4 test input terminal. *3 Blue 3 V terminal.. Make sure all terminals on the B Module of the F3SX are properly connected. Do not connect the terminals to another Module. See the F3SX operation manual for details. *2. Make sure to connect the pink wire (mode selection input 2) to 24 VDC. *3. Make sure to connect to the V terminal when the E3FS is not connected to an F3SX and the test input is not used. Note:The E3FS-B4 functions as a standalone Sensor when it is connected as shown in the wiring diagram above. However, it is certified a Type 2 Safety Sensor when it is properly connected to the B Module of the F3SX. This also means it must be properly connected to an F3SX to use it as part of a safety system. BB-33

10 Connections Circuit Diagram Example F3SX-EB (Manual Reset) Circuit diagram example without an E3FS-B4 Single-beam Safety Sensor installed VDC (brown) V (blue) Single-beam Safety Sensor E3ZS-T8A/ E3FS-B4 Test input (pink) (See note 3.) Control output (black) V (blue) Mode selection input (pink) (See note 4.) 24 VDC (brown) Single-beam Safety Sensor 2 E3FS-B4 Curtains Control circuits 24 VDC 24VDC KM E S 24 VDC E 24 VDC A2 SSC AS3 AS2 AS SS SS2 E 24 VDC 2 V RY RY2 S VDC E A T T2 T2 T22 Y Y2 Y COM FB 24 VDC Test input V Control circuits Control circuits Test input 24 VDC (brown) V (blue) 24 V VDC Test input Test input (pink) (See note 3.) Control output (black) V VDC V VDC Test input (pink) (See note 3.) V (blue) Control circuits 24 VDC (brown) Control circuits Test input Control output (black) V (blue) Mode selection input (pink) (See note 4.) RY RY2 KM 24 VDC (brown) Fuses KM2 V (blue) Mode selection input (pink) (See note 4.) 24 VDC (brown) Single-beam Safety Sensor 4 E3ZS-T8A/ E3FS-B4 AC KM2 M Test input (pink) (See note 3.) V (blue) 24 VDC (brown) Control output (black) V (blue) Mode selection input (pink) (See note 4.) 24 VDC (brown) Single-beam Safety Sensor 3 E3FS-B4 Timing Chart Emergency stop switch S Reset switch S2 Single-beam Safety Sensor Single-beam Safety Sensor 2 Single-beam Safety Sensor 3 Single-beam Safety Sensor 4 Light incident Light interrupted DC Solid-state Safety Output SS, SS2 KM, KM2 N.C. contacts KM, KM2 N.O. contacts Light incident Light interrupted Light incident Light interrupted Light incident Light interrupted S: Emergency stop switch with positive opening mechanism (A65E or A22E) S2: Reset switch KM, KM2: Magnetic contactor RY, RY2: Relay M: Three-phase motor E: 24-VDC power supply (S82K) Note. The above circuit diagram example conforms to Category 2. Note 2. The EN624- stop function category is (zero) for the example in the above circuit diagram. Note 3. The black wire is used when the Cable with Connector (Socket) on One End (XS2F-D42-8- ) is connected to an E3FS-B4-M-M Connector. Note 4. The white wire is used when the Cable with Connector (Socket) on One End (XS2F-D42-8- ) is connected to an E3FS-B4-M-M Connector. Note 5 When the FB (feedback input) function of the F3SX is not used, make setting changes with the F3SX function setup software (F3SX-CD). BB-34

11 Precautions for Correct Use Warning OMRON's Single-beam Safety Sensor Input Module (B Module) from the F3SX Series is the only Controller that can be used for the E3ZS-T8A/ E3FS-B4 (type 2). Normal operation may not be possible if another Single-beam Sensor Controller is used. The Sensor cannot be used as part of a safety system when the mode selection input of the Single-beam Safety Sensor is connected to V because the Sensor will turn ON when light is interrupted (Dark ON). Be sure to connect the mode selection input to 24 VDC if you want the Sensor to turn ON when light is incident (Light ON). Safety Distance The safety distance is the minimum distance that must be maintained between the Sensor and a hazardous part of the machine in order to stop the machine before someone or something reaches it. The safety distance is calculated based on the following equation when a person moves perpendicular to the detection zone of the Sensor. Safety distance (S) = Intrusion speed into the detection zone (K) x Total response time for the machine and Sensor + Additional distance calculated based on the detection capability of the Sensor (C) The safety distance varies with national standards and individual machine standards. The equation is also different if the direction of intrusion is not perpendicular to the detection zone of the Sensor. Be sure to refer to related standards. Here T = T + T2 + T3 where T = Maximum machine stop time (s) T2 = Sensor response time (s) (From ON to : 2. ms for the E3FS) T3 = F3SX response time (s) (From ON to : Refer to Response Time.) The maximum stop time for a machine is the time it takes to actually stop dangerous parts after the machine receives a stop signal from the F3SX. Warning Measure the actual maximum stop time for the machine and then periodically check it to see if the time changes. Reference: Method for Calculating Safety Distance as Defined in the European Standard EN999 (with Intrusion Perpendicular to the Detection Zone) K and C are as follows for Single-beam Safety Sensors. ) When a Single-beam Safety Sensor is used alone (when the risk assessment indicates that a single beam is sufficient) K =,6 mm/s C =,2 mm Height of the beam from the ground or from a reference surface: 75 mm (EN999 recommendation) 2) When multiple Single-beam Safety Sensors are installed at different heights. K =,6 mm/s C = 85 mm The beam heights in the following table are the EN999 recommendations. Height from the reference surface No. of beams (example: the floor) 2 4 mm, 9 mm 3 3 mm, 7 mm, mm 4 3 mm, 6 mm, 9 mm, 2 mm Note. Refer to the F3SN/F3SH instruction manuals for details on Curtains and Multi-beam Safety Sensors. Preventing Mutual Interference Observe the following items during installation to prevent Single-beam Safety Sensors from interfering with each other or with Curtains. Leave adequate space between the Sensors during installation. (Refer to the instruction manuals for the E3ZS/E3FS and the F3SN/F3SH.) Use baffle plates to separate Sensors. Alternate s and s during installation. (See the figure below.) Check for mutual interference between Single-beam Safety Sensors or Curtains connected to the same or different Control Units before finalizing placement and starting normal operation. Warning When installing multiple Curtains, Multi-beam Safety Sensors, and Single-beam Safety Sensors, take necessary steps to prevent mutual interference. Otherwise detection may fail and serious injury may result. Curtains BB-35

12 Dimensions Sensors CAD Data The ÅgCAD DataÅh mark indicates 2D CAD drawings and 3D CAD data are available for the model. CAD data can be downloaded from the Omron Industrial Web site ( (Unit: mm) Pre-wired Cable with ABS Resin Case E3ZS-T8A CAD Data Emission indicator (emitter only) Stability indicator (receiver only) Operation indicator (receiver only) Beam Lens 2. 7 Curtains M3 4-mm diameter vinyl-insulated round cord with 4 conductors (cross section of conductors:.2 mm 2, insulation system:.-mm diameter), standard length: 2 m Pre-wired Cable with ABS Resin Case E3FS-B4 2M 3.2 CAD Data Lens surface dia. 24 (See note.) 4 dia. 6.4 dia. 9 dia M8 x Note: Vinyl-insulated round cord with four Operation indicator conductors and three conductors, 4 dia. (cross sections of conductors:.2 mm 2, insulation system:. mm dia.) Connector with Metal Case E3FS-B4-M-M CAD Data Lens surface dia M2 x 6.4 dia. 9 dia. 4 M8 x Operation indicator BB-36

13 Curtains BB-37

14 Cables with Connectors on Both Ends for Branch Connection F39-JFS F39-JF2S F39-JF5S F39-JFS L (See note.) dia Curtains Model L F39-JFS, F39-JF2S 2, F39-JF5S 5, F39-JFS, Note : Dimensions will vary with the model as shown in the table on the left. Cables with Connectors (Socket and Plug) on Both Ends XS2W-D42-C8-A (L=m) XS2W-D42-D8-A (L=2m) XS2W-D42-G8-A (L=5m) XS2W-D42-J8-A (L=m) XS2W-D42-C8-R (L=m) XS2W-D42-D8-R (L=2m) XS2W-D42-G8-R (L=5m) XS2W-D42-J8-R (L=m) dia. L Vinyl-insulated round cord, 6 dia. (gray), 4 conductors (cross sections of conductors:.5 mm2, insulation system:.7 mm dia.), standard length: L (See note.) 4.9 dia. 4.9 dia CAD Data XS2W-D422-D8-A (L=2m) XS2W-D422-G8-A (L=5m) 4.9 dia dia L XS2W-D423-D8-A (L=2m) XS2W-D423-G8-A (L=5m) 4.9 dia. 6 dia dia. 4.7 L 25.3 XS2W-D424-D8-A (L=2m) XS2W-D424-G8-A (L=5m) dia. 4.9 dia L BB-38

15 Cables with Connector (Socket) on One End XS2F-D42-C8-A (L=m) XS2F-D42-D8-A (L=2m) XS2F-D42-G8-A (L=5m) XS2F-D42-J8-A (L=m) XS2F-D42-C8-R (L=m) XS2F-D42-D8-R (L=2m) XS2F-D42-G8-R (L=5m) XS2F-D42-J8-R (L=m) 4.9 dia M2 5 dia DC M2 5 dia 45 6 dia 3 5 L 5 AC XS2F-D422-C8-A (L=m) XS2F-D422-D8-A (L=2m) XS2F-D422-G8-A (L=5m) XS2F-D422-J8-A (L=m) XS2F-D422-C8-R (L=m) XS2F-D422-D8-R (L=2m) XS2F-D422-G8-R (L=5m) XS2F-D422-J8-R (L=m) Connector Plug Assemblies, Solder Type XS2G-D M2 M2 5 dia 5 dia DC dia 45 5 dia M2 AC 6 dia L Curtains 4.9 dia 4.2 dia DC AC 47. XS2G-D dia dia M2 x 23 DC Connector Plug Assemblies, Screw-on Type XS2G-D4S5 M2 x dia 4.9 dia 4 dia XS2G-D4S6 M2 x dia 4.9 dia dia BB-39

16 Controller F3SX CAD Data Dimensions (W) Curtains 3 Refer to to Ordering Information on page on page BB-27 5 for dimension details. BB-4