Electromechanical pressure switches

Transcription

1 Presentation Presentation Pressure type XMX and XMA are for control circuits, with an adjustable differential. They are used to control the pressure of water and air, up to. Equipment fitted to the various models Location of setting screw Pressure type XMX have an internal setting screw that is only accessible after removing the cover. Pressure type XMA have an external setting screw that is accessible without removing the cover. Case Pressure type XMX have a black opaque case. Pressure type XMA can have a transparent case or a black opaque case. Setting When setting pressure XMX or XMA, adjust the switching point on rising pressure (PH) first and then the switching point on falling pressure (PB). Switching point on rising pressure The switching point on rising pressure (PH) is set by adjusting screw-nut. Switching point on falling pressure The switching point on falling pressure (PB) is set by adjusting screw-nut. References: page / page / /

2 Characteristics Environment characteristics Conformity to standards e, IEC/EN -- Product certifications Protective treatment UL, CSA, ccc "TC" Ambient air temperature C For operation: - + for and versions - + for version For storage: - + Fluids controlled C Air, fresh water, sea water: + C for and versions + C for version Materials Operating position Case: polycarbonate impregnated with Lexan R fibreglass (black opaque cover) or polycarbonate impregnated with Lexan fibreglass (transparent cover) Component materials in contact with fluid: chromated zinc alloy (fluid entry), canvas covered nitrile (diaphragm) All positions Electric shock protection Class I conforming to IEC Degree of protection IP conforming to IEC/EN Operating rate Op. cycles/h Repeat accuracy <.% Fluid connection G / or x G / (BSP female) conforming to NF E -, ISO Electrical connection Terminals tapped entries for n (DIN Pg.) cable gland Contact block characteristics Rated operational characteristics a AC-, B (Ue = V, Ie =. A; Ue = V, Ie = A) c DC-, R (Ue = V, Ie =. A) Rated insulation voltage V Ui = conforming to IEC/EN - Rated impulse withstand voltage kv U imp = conforming to IEC/EN - Type of contacts CO single-pole contact, snap action Terminal referencing Conforming to CENELEC EN Short-circuit protection Connection Electrical durability A cartridge fuse type gg (gl) Screw clamp terminals Minimum clamping capacity: x mm Maximum clamping capacity: x. mm AC supply /Hz, Ith = A Inductive circuit, utilisation category AC-, A/ V: million operating cycles References: page / page / /

3 References, characteristics For control circuits, type XMX Sizes to ( to. psi) Adjustable differential, for regulation between thresholds Switches with CO single-pole contact Pressure type XMX (internal setting screw) Adjustable range of switching point (PH) () (. psi). (. psi). (.. psi) (. psi). (. psi). (.. psi) Fluid connection G / (female) x G / (female) References Switches with black opaque cover Fluids controlled Air, fresh water, sea water () XMX AL XMX AL XMX AL XMX AL XMX AL XMX AL Weight (kg).... Complementary characteristics not shown under general characteristics (page /) Possible differential (subtract from PH to give PB) Min. at low setting. (. psi) (. psi). (. psi). (. psi) (. psi). (. psi) Min. at high setting. (. psi). (. psi). (. psi). (. psi). (. psi). (. psi) Max. at high setting. (. psi). (. psi) ( psi). (. psi). (. psi) ( psi) Maximum Per cycle. (. psi) (. psi). permissible pressure (. psi) Accidental. (. psi) (. psi). (. psi). (. psi). (. psi) (. psi). (. psi) (. psi). (. psi) Destruction pressure ( psi) ( psi) ( psi) ( psi) Mechanical life x operating cycles Cable entry entries tapped for n cable gland, conforming to NF C - (DIN Pg.) Pressure switch type Diaphragm () Component materials of units in contact with the fluid, see page /. Operating curves XMX Appppp XMX Appppp XMX Appppp.. Falling pressure. Maximum differential Minimum differential.... Maximum differential Minimum differential... Maximum differential Minimum differential Pressure PH PB Adjustable value Connections Time Other versions Pressure with alternative tapped cable entries: ISO, NPT, etc. Please consult our Customer Care Centre. Accessories: page / page / /

4 References, characteristics For control circuits, type XMA Sizes to ( to. psi) Adjustable differential, for regulation between thresholds Switches with CO single-pole contact Pressure type XMA (external setting screw) Adjustable range of switching point (PH) () (. psi). (. psi). (.. psi) (. psi). (. psi). (.. psi) Fluid connection G / (female) x G / (female) References Switches with black opaque cover Fluids controlled Air, fresh water, sea water () XMA HL XMA HL XMA HL XMA HL XMA HL XMA HL Switches with transparent cover Fluids controlled Air, fresh water, sea water () XMA VL XMA VL XMA VL XMA VL XMA VL XMA VL Weight (kg).... Complementary characteristics not shown under general characteristics (page /) Possible differential (subtract from PH to give PB) Min. at low setting. (. psi) (. psi). (. psi). (. psi) (. psi). (. psi) Min. at high setting. (. psi). (. psi). (. psi). (. psi). (. psi). (. psi) Max. at high setting. (. psi). (. psi) ( psi). (. psi). (. psi) Maximum permissible pressure Per cycle. (. psi) (. psi). (. psi) Accidental. (. psi) (. psi). (. psi) Destruction pressure ( psi) ( psi) Mechanical life x operating cycles. (. psi). (. psi) Cable entry entries tapped for n cable gland, conforming to NF C - (DIN Pg.) Pressure switch type Diaphragm () Component materials of units in contact with the fluid, see page /. (. psi) (. psi) ( psi). (. psi). (. psi) ( psi) ( psi) Operating curves XMA pppppp XMA pppppp XMA pppppp Pressure PH PB... Maximum differential Minimum differential.... Maximum differential Minimum differential... Maximum differential Minimum differential Adjustable value Connections Time Other versions Pressure with alternative tapped cable entries: ISO, NPT, etc. Please consult our Customer Care Centre. Accessories: page / page / /

5 References Accessories and replacement parts XMA ZL XML ZL Description Reference Weight kg Fixing bracket XMA ZL. Knurled adjustment knob, Ø mm fits over adjustment screws to facilitate setting XML ZL. P cable gland With anti pull-out ring (for cable Ø mm) DE PM. Without anti pull-out ring (for cable Ø mm) DE PM. With anti pull-out ring (for cable Ø. mm) DE PM. DE PM Without anti pull-out ring (for cable Ø. mm) DE PM. Description For pressure switch Reference Weight kg Diaphragms Size XMP Z. DE PM Size XMP Z. Size XMP Z. XMP Zp /

6 Dimensions Accessories and replacement parts XMX AL, XMX AL XMA pl, XMA pl XMA: XMX AL, XMX AL XMA pl, XMA pl XMA:.. = = ()... = = r = () r = () D A C A ØA = G / (female) ØA = ØB = ØC = ØD = G / (female) () tapped entries for n cable gland () tapped entries for n cable gland () Minimum clearance zone for screwing-on pressure switch at point A () Minimum clearance zone for screwing-on pressure switch at point A XMX AL, XMX AL XMA pl, XMA pl XMA: Fixing bracket XMA ZL B ()... = = r = () C A D B XMp pl: ØA only = G / (female) XMp pl: ØA = ØB = ØC = ØD = G / (female) () tapped entries for n cable gland () Minimum clearance zone for screwing-on pressure switch at point A Characteristics: page / References: page / /