schmersal PSC1 Series Installation Manual page 76

Installation manual
4.3.4.1.4 Dual-channel switching relay output with external monitoring - collective feedback
For safety applications from PL d according to EN ISO 13849-1, two relays are used in the
PSC1-C-10-x module and two external contactors.
X22
Q5.1
Q5.2
Q6.1
Q6.2
I01
I02
I03
O04
X14
I13
I14
T1
T2
X12
Figure: Dual-channel switching relay output with external monitoring –
feedback
The two external monitoring contacts are connected in series, supplied with pulse signal T0
and read by I00 (configured as EMU input). With increased requirements it is to be noted that
at least 1 switching process must take place at least every 24 hours.
Safety instructions:

An adequately high test rate is required to achieve PL e according to EN ISO 13849-1.

For applications with frequent demand for the safety shutdown, testing should be at
short intervals, e.g. at the start of the shift, 1x per week. However, a test should be
undertaken cyclically at least 1 x per year.
4.3.4.1.5 Dual-channel output with relay output and semiconductor output – external control
circuit with monitoring
For safety applications from PL d and higher according to EN ISO 13849-1. The external
circuit is operated using two channels via one relay output and one semiconductor output.
HB-37350-810-01-38F-DE PSC1-C-10 Installation manual V1.1.docx
Version: 38F
L+
L-
collective
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