Hardware: PSR-TRISAFE-S safety module
103503_en_03 PHOENIX CONTACT 3-7
3.4 Signal connections
All input and output connections, with the exception of the USB interface, are made via plug-
in keyed connection terminal blocks.
Figure 3-5 PSR-TRISAFE-S signal connections
The various signal connections are described in the following sections.
3.4.1 Signal inputs
The PSR-TRISAFE-S safety module has 20 digital signal inputs (24 V HTL/3 mA) for the
direct connection of safe control devices and/or safety sensors for monitoring and
evaluating processes.
The safe inputs are linked to the safety logic in the connection editor of the SAFECONF
configuration software. See also "Adding and connecting functions, functional blocks, and
signals in the safety logic" on page 4-11.
Signal redundancy due to
dual signals
Every two adjacent signal inputs (i.e., I0 and I1, I2 and I3, etc.) are grouped together and
locked by default to form a dual signal in the SAFECONF configuration software. This is
indicated in the representation of the safety module in the hardware editor of the
configuration software by a red padlock at the relevant inputs. The two signals are then
always used as a pair, i.e., both signals are dragged, dropped, cut or deleted together in the
connection editor.
However, if required this lock can be removed and the dual signal split into two single
signals.
Supply for logic and
alarm outputs
Test pulses for
cross-circuit
detection
Supply for
safe outputs
Safe inputs
Safe outputs
Standard alarm
outputs
Ground switching
outputs
Dual signals are not connected to one another internally; they are simply grouped
together.
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