PNOZ s7.2
Operating Manual PNOZ s7.2
21866-EN-10
11
Preparing for operation
Supply voltage/input circuit/
feedback loop
AC
DC
Contact expansion module PNOZ
s7.2
Interface
PNOZsigma
PNOZs
expansion
module
PNOZs
expansion
module
Connection to PNOZsigma
base unit/PNOZmulti Mini base
unit
Base unit: Safety relay PNOZ-
sigma
Base unit: Small control system
PNOZmulti Mini
The feedback loop is connected
and evaluated via the connector
PNOZmulti Mini
base unit
PNOZsigma
expansion
module
Operation
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
When the product is used in accordance with the European Machinery Directive, a check
must be carried out to ensure that the safety contacts on the relay outputs open correctly.
Open the safety contacts (switch off output) and start the device again, so that the internal
diagnostics can check that the safety contacts open correctly
}
for SIL CL 3/PL e at least 1x per month
}
for SIL CL 2/PL d at least 1x per year
NOTICE
The safety function should be checked after initial commissioning and each
time the plant/machine is changed. The safety functions may only be
checked by qualified personnel.
LEDs indicate the status and errors during operation:
LED on
Status indicators
IN1
Channel 1 actuated.
IN2
Channel 2 actuated.
IN1, IN2, OUT
Safety contacts are closed.
