1 Preliminary note Technical data, approvals, accessories and further information at www�ifm�com� 1.1 Explanation of symbols ► Instruction > Reaction, result → Cross-reference Important note Non-compliance may result in malfunction or interference� Information Supplementary note� WARNING Warning of serious personal injury�...
4 Functions and features AS-Interface safety switches type AC901S/AC902S operate as slaves on the safety bus AS-Interface Safety at Work and function as electromagnetic interlock devices with guard locking� The actuator has a low coding level�...
Page 6
exposure to a mechanical hazard� For the control system this means the following: - Switch-on commands which cause hazardous situations must become active only when the safety guard is in a protective position and the guard locking in locked position� - The locked position of the guard locking must be released only when the hazardous situation is no longer present�...
EN ISO 13849 2: 2013, Table A4 can be assumed� 5.1 Actuator version Actuator S for the AS-i safety switches AC901S/AC902S without insertion funnel� 5.2 Version AC901S (guard locking by spring force) Additional measure for personal protection against dangerous overtravel...
► Insert the actuator into the safety switch� > The locking bolt is released� - AC901S: The locking bolt passes into the locked position by spring force� - AC902S: The locking bolt passes into the locked position by applying the operating voltage of the solenoid�...
AC901S ► Apply the operating voltage of the solenoid and release the guard locking via the AS-Interface output bit D0� > The guard locking is deactivated, the solenoid monitoring contact ÜK opens� The value pair 0, 0 is transmitted in every bus cycle via the AS-Interface input bits D2 and D3�...
6 Installation Do not use safety switches and actuators as an end stop and only mount in assembled condition� ► At ambient temperatures higher than 40 °C protect the switch against contact with inflammable material or personnel� 6.1 Installation instructions ►...
6.1.1 Changing the actuating direction ► Remove the screws from the actuating head� ► Set the required direction� ► Tighten the screws with 0�6 Nm� ► Close the unused actuating slots with the supplied slot covers� 6.2 Protection against environmental influences A lasting and correct safety function requires that the actuating head must be protected against the penetration of foreign bodies such as swarf, sand, blasting shot etc�...
7.1 Wiring The safety switch is connected to the bus system with an M12 connector and a 4-pole cable� Additionally, via a passive AS-Interface splitter with a yellow and black AS-Interface cable� 1� AS-Interface + 2� Auxiliary voltage 3� AS-Interface - 4�...
The switch is monitored for malfunction, the door contact (SK) must not switch before the guard locking contact (ÜK)� Observe the following if in the event of a spring-interlocked safety switch AC901S the interlocking solenoid is switched on (released) in the operating mode door...
9 Operation 9.1 LED indicators / AS-Interface status messages Status Device status LED 3 Fault LED 4 Power green is lit normal operation red and green are lit - slave address = 0 - offline phase 1: LED green 2: LED red 3: LED red FAULT 4: LED green Power The AS-Interface bus status is indicated by two LEDs (Power, Fault)�...
► Close the safety guard several times to check the function� 10.2 Electrical function check ► 1� Switch on the operating voltage� ► 2� Close all safety guards� ► In case of guard locking by means of solenoid force activate the guard locking� The machine must not start automatically�...
- non-compliance with the safety regulations - installation and electrical connection by non-authorised personnel - failure to perform function checks� 11 Scale drawing M12x1 38,5...
12 Technical data AC901S, AC902S Safety switch with guard locking The device can be used in applications according to EN ISO 13849-1: 2016 up to PL d� Mechanical data Housing material reinforced glass-fibre thermoplastic Degree of protection to IEC 529...
14 Data bit table 1: Safety guard closed and locked 2: Safety guard closed and not locked 3: Safety guard open Program- Status D0, D1 D2, D3 Monitor ming diagnostics Dual channel Safety guard closed Code sequence Green conditionally and locked dependent Safety guard closed Half...
Page 20
Program- Status D0, D1 D2, D3 Monitor ming diagnostics Dual channel Safety guard closed Code sequence Green independent and locked Safety guard closed Half and not locked sequence Invalid status Half (safety guard open, sequence guard locking active) Safety guard open Address 0 or —...
Page 21
Program- Status D0, D1 D2, D3 Monitor ming diagnostics Dual channel Safety guard closed Code sequence Green if safety dependent and locked guard was open Synchronisation before time infinite or flashing yellow after start-up, if only guard locking was open� Safety guard closed Half Flashing yellow, if...
Page 22
15 Standards and approvals 15.1 Directives and standards The following standards and directives have been applied: - Machinery Directive 2006/42/EC - EN ISO 13849-1: 2016 - EN 62026-2: 2013 - EN 60947-5-1: 2004/: 2009 - EN 60947-5-1: 2004/: 2009 - Annex K - EN 14119: 2013 15.2 Approvals - EU declaration of conformity...