Catalogue:Screw limit switches XRBA and XR2
22Pages

Screw limit switches

Screw limit switches XRBA and XR2 Selection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2 ■ Screw limit switches for standard duty: XRBA □ Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4 □ Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5 □ References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6 □ Order form . . . . . . . . . . . . . . . . . . . . . . ....

Selection guide Screw limit switches Standard duty a or c (Ithe = 10 A) Heavy duty a or c (Ithe = 10 A) Conventional thermal current (Ithe) Single-pole C/O, snap action Single-pole C/O, snap action Reduction gear ratio XRBA4: IP 55 conforming to IEC/EN 60529, IP 557 conforming to NF C 20-010 XRBA6: IP 55 conforming to IEC/EN 60529, IP 555 conforming to NF C 20-010 Cable entry 1 tapped entry for n° 9 cable gland Clamping capacity 5 to 8 mm 1 tapped entry for n° 16 cable gland Clamping capacity 10 to 14 mm 2 tapped entries for n° 13 cable gland Clamping capacity 9 to 12 mm Stainless steel...

Heavy duty a or c (Ithe = 10 A) Heavy duty a or c (Ithe = 20 A) Single-pole C/O, snap action Single-pole N/C or N/O, with snap action mechanism Removable gland plate Removable gland plate Sheet steel enclosure Sheet steel enclosure

Screw limit switches Standard duty, XRBA Functions These switches are designed to monitor the movement of an object via an input drive shaft coupled to the actuator. Detection of position is ensured by a system of independently adjustable cams which actuate the electrical contact blocks. They are usually used for applications where it is either impossible or impractical to mount standard type position sensors that are actuated directly by the moving object. Main applications: b position control of moving parts of hoisting or materials handling equipment (winches, travelling cranes,...

Screw limit switches Standard duty, XRBA Conformity to standards Protective treatment Standard version Special version Shock resistance Vibration resistance XRBA4pppp: IP 55 conforming to IEC/EN 60529, IP 557 conforming to NF C 20-010 XRBA6pppp: IP 55 conforming to IEC/EN 60529, IP 555 conforming to NF C 20-010 Stainless steel input shaft. Aluminium alloy body housing. Aluminium alloy cover for XRBA4pppp Polyphenylene oxide cover for XRBA6pppp 1 tapped entry for n° 9 cable gland (clamping capacity 5 to 8 mm) and 1 tapped entry for n° 16 cable gland (clamping capacity 10 to 14 mm) Cable...

Screw limit switches Standard duty, XRBA Screw limit switches Description Basic reference, to be completed (1) XRBA4pppp Screw limit switches (with bare drive shaft) N° 9 plastic, clamping capacity 5 to 8 mm Other Ohmic values Chain sprockets 12.7 mm pitch, for switch input drive shaft Cable glands N° 16 plastic, clamping capacity 10 to 14 mm Contact block Short roller lever actuator 1 C/O snap action contact Separate components and replacement parts XRBA4pppp DE9PL109041 Chains (12.7 mm pitch) conforming to standard NF E 26-101, chromium plated, with joining link (3) XRBZ91p Potentiometers...

Order form Screw limit switches (specimen suitable for photocopying) Standard duty, XRBA Customer Company Schneider Electric Sales Ofce - Subsidiary Co. Delivery date To use this order form: b State the number of identical screw limit switches required b Complete the basic reference with the 5 digits indicating the various switch options b Mark the required cam arrangement on the drawing below. For examples showing completion of the basic reference, refer to pages 8 and 9. Number of identical switches Basic reference, to be completed Reduction gear ratio Drive shaft position Ohmic value of...

Screw limit switches Screw limit switch selection example Standard duty, XRBA Application: monitoring the movement of a machine part Example: Monitoring the movement of a machine part from A to F (AF = 7.5 m) with potentiometer linked display. Chain sprocket on switch input drive shaft: 16 teeth on 12.7 mm pitch. Point A Point B Points C and D Point E Point F Stop position, direction F V A Slow-down position, direction F V A Specic points Slow-down position, direction A V F Stop position, direction A V F Selection of switch and completion of basic reference b Number of contacts: 6 positions...

Screw limit switches Screw limit switch selection example Standard duty, XRBA Potentiometer rotation angle Example: Controlling a change in liquid level of 5.30 m Selection of reduction gear ratio From the above table, select the value immediately superior to 5.30 m, i.e. 5.50 m b Case n° 1: without potentiometer. Recommended solution: v Reduction gear ratio: 46/1, chain sprocket with 12 teeth on 12.7 mm (0.0127 m) pitch. v Cam rotation angle: 5.30 × 360 282× 5.30 ° or, by calculation: 12 × 0.0127 using above table: = 272 = 272° 5.50 46 v Completion of basic switch reference: Case n° 2:...

Screw limit switches Heavy duty, XR2 Functions These switches are designed to monitor the movement of an object via an input drive shaft coupled to the actuator. Detection of position is ensured by a system of adjustable ngers which actuate the electrical contact blocks. They are usually used for applications where it is either impossible or impractical to mount standard type position sensors that are actuated directly by the moving object. Main applications: b position control of moving parts of hoisting or materials handling equipment (winches, travelling cranes, gantries, cranes, rotary...

Screw limit switches Conformity to standards Protective treatment Standard version Special version Shock resistance Vibration resistance XR2AA: Aluminium alloy body housing, insulated cover XR2AB and XR2BB: Sheet steel enclosure XR2AA: 2 tapped entries for n° 13 cable gland (clamping capacity 9 to 12 mm) XR2AB and XR2BB: Removable gland plate Cable entry Maximum number of turns of threaded shaft Threaded shaft screw pitch Operating nger radius Length of developed helical travel Contact actuators differential snap-over angle (measured at nger) Tripping point repeat accuracy Number of turns...