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9.3.1. Self-test with test input TST
On electromechanical safety switches or magnetic switches, the function test can be performed by cyclically opening the
guard.
From category 2 according to EN ISO 13849-1, EN 60204-1 : 1997 (section 9.4.2.4) requires a function test performed
on the entire safety system on start-up or after defined intervals.
Testing of the internal function of the unit is not necessary because the device monitors itself in real time. Welding of an
output contact (relay output) is detected by the device at the latest the next time the guard is opened. A short circuit in the
output cable is not detected by the device.
In addition, the entire safety circuit can be tested without opening the guard. For this purpose, opening of the guard can be
simulated by applying 24 V DC to the test input TST.
The safety outputs are switched off, enabling testing of the complete safety circuit. The diagnostic output DIA on the eval-
uation unit is also set to HIGH as a monitoring function.
When test input TST is reset, the evaluation unit resets the diagnostic output DIA to LOW, the red LED switches off and
normal operation is continued.
In Manual start operating mode, the start button must be pressed again to start the system.
Important!
After the self-test, the test input TST must be connected to 0 V again or must be disconnected.
2097098-18-10/19 (Translation of the original operating instructions)
Non-Contact Safety System CES-A-UEA-02B/CES-A-UEA-04B
Operating instructions
EN
17
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