Pinnacle Systems CA - Manual (Page 20)

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Installation Procedures
Model CA Cascading Safety Light Curtain
Wiring Safety Relays or a Safety Relay
Module
The SS guard can be wired to individual Safety Relays
with the EDM option, or to the more fl exible Safety
Relay Module.
The Model Number SSSR Safety Relay Module has two
internal Safety Relays inside and has built-in circuitry
to check for contact welding. The SSSR Module also
allows for Automatic or Manual Relay resetting. If you
choose to wire your guard using this Module, follow
the 28-142 wiring diagram page and Table 3 below.
See manufactures instructions provided with the SSSR
Module for further details regarding the SSSR. See
Table 3 for wiring.
The Part Number 52-278 Safety Relay is a lower cost
alternative to the SSSR Module, but requires two 52-
278 Safety Relays and does not allow you to select
automatic or manual relay resetting in the fi eld and so
requires you to choose auto/manual when you order
your light curtain. Also, the Part Number 52-278 does
not self-check and so requires you to order your light
curtain with the EDM option. If you choose to wire the
Part Number 52-278 Safety Relays follow the 28-141
wiring diagram using two Part Number 52-278 relay/
socket assemblies. Mount them on a DIN-rail in your
control panel.
NOTE: You must use at least 2 output STOP circuits. If
your machine has only 1 STOP circuit, you must wire 2
STOP circuits in series.
Table 3: Safety Relay Module Wiring
Terminal Description Connect to Wire Color
A1 (1.1) +Supply input +24v power Red
A2 (2.4) -Supply input Ground Black
PE Earth
S12 (4.3) Ch1 input CA Output 1 Blue
S31 (2.3) Ch2 input CA Output 2 Brown
S22 (2.2) Ch2 input S21 (2.1)
S35 (1.4) Auto Reset S12 (4.3)
S35 (1.4) Manual Reset thru N.O. push button to S12 (4.3)
13 (3.1) -14 (4.1) N.O. (held closed) output Stop circuit 1
23 (3.2) -24 (3.3) N.O. (held closed) output Stop circuit 2
31 (3.4) -32 (4.4) N.O. (held open) output Aux circuit 3
The Model SS and Model CA light curtains do not
require mechanical safety relays if you connect both
solid-state SS/CA outputs (both Blue and Brown wires)
to separate inputs on a control-reliable safety PLC.
This confi guration does not require the EDM option.