schmersal PSC1 - Page 78

Installation manual
HB-37420-810-01-25F-EN PSC1-C-100 Installation manual - V2.2.docx Page 78 of 201
Version: 25F
Safety instructions:
• For applications with frequent demand for the safety shutdown, testing should be at
short intervals, e.g. at the start of the shift, 1 x per week. However, a test should be
undertaken cyclically at least 1 x per year.
• The test function for the outputs is undertaken for group operation and individual
operation. The signal outputs are not tested.
• The high-side (Qx_P) and low-side (Qx_N) outputs are not allowed to be used
individually for safety tasks. Usage for safety tasks is only permissible in the combination
high-side / low-side.
• Mixed operation of the relay contacts is not allowed!
• Mixed operation: A hazardous touch voltage potential may not be mixed with
a safety extra-low voltage.
Example:
INCORRECT: 230 V AC are switched via Q4.1 + Q4.2 and 24 V DC are switched via
Q5.1 + Q5.2.
CORRECT: 230 V AC are switched via Q4.1 + Q4.2 and Q5.1 + Q5.2
or 24 V DC are switched via Q4.1 + Q4.2 and Q5.1 + Q5.2.
The outputs can be loaded as follows:
Output
Voltage
Current
Relay Qx
24
VDC
2.0 A (DC13)
Relay Qx 230 V AC 2.0 A (AC15)
Yx 24 VDC 250 mA
Qx_P 24 VDC 2 A
Qx_N GNDEXT 2 A
Qx
24 VDC
2A
Safety instructions:
• For safety-related applications, only actuators with a holding power > 0.4 W or a load
resistance < 100 Ω can be used.
• The derating in chapter 3.8 must be observed under all circumstances.
• A series of diagnostic measures are implemented for the output system. Attention is to
be paid here in particular to the inclusion of elements for increasing the switching rating
such as relays, contactors etc. in the shutdown circuit.