Wiring the Inputs and Outputs
7-20 Operating Manual: PSS 3075-3 Series
Dual-pole outputs
Features:
• 9 dual-pole outputs O1.16 ... O1.21, O2.16 ... O2.18
• Output current: 2 A
• The continuous current over all the outputs must not exceed the following
values:
- max. total of 10 A at terminals X1 and X2
- max. total of 10 A at terminals X8 and X9
• The operating system on the programmable safety system tests the
outputs during each cycle. Any short circuits and open circuits to the load
will be detected (short circuits are detected only when the outputs are
switched on).
• During testing, the load is isolated from the supply for 100 ... 200 µs in
each cycle (depending on the load and cable runs). The load must not
switch off during this time.
Outputs that are switched off are switched on for approximately 100 µs in
order to test the monitoring inputs. The load must not switch on during
this time.
• Error messages can occur when testing outputs on which the contactors
are smaller than the recommended load. The error messages are
triggered by too high an inductance on the contactors. In this case it
helps to have a 1 kOhm resistor connected in parallel to the contactor
coil.
• Each output is protected against short-circuit, overload and excess
temperature. Outputs are designed for resistive and inductive loads.
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