Connecting the Inputs and Outputs
5-6 Installation Manual: PSS 3056 Series
On-board digital inputs
PSS 3056 PSS 3056-1 PSS 3056-2
PSS SB 3056
Number 32 40 48
Configuration I0.0 - I0.31 I0.0 - I0.31 I0.0 - I0.31
I2.0 - I2.7 I2.0 - I2.15
Features:
• One 0 V terminal per slot needs to be connected.
This means that on the standard PSS 3056 and on the PSS SB 3056,
one 0 V terminal belonging to inputs I0 - I31 must be connected. On the
PSS 3056-1 and PSS 3056-2, one 0 V terminal belonging to inputs I0.0 -
I0.31 and one 0 V terminal belonging to inputs I2.0 - I2.7 / I2.0 - I2.15
must be connected.
• Only input signals which operate in accordance with the zero signal
principle (on switching off) are permitted for safety-related applications.
• Signals may be connected using unscreened cables.
CAUTION!
The connection shown overleaf is only approved for non-safety
applications. The connection of safe input devices for safety-relevant
applications is described later in the chapter.
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