Weidmuller UR20-4DI-4DO-PN-FSOE, Manual

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5 Detailed descriptions of safe modules
| Safe power-feed module UR20-PF-O-2DI-DELAY-SIL
64 1484600000/04/06.2017 u-remote IP20 modules for functional safety manual
5.9 Safe power-feed module UR20-PF-O-2DI-DELAY-SIL
Safe power-feed module UR20-PF-O-2DI-DELAY-SIL (Order No. 1335040000)
The power-feed module UR20-PF-O-2DI-DELAY-SIL enables
the safe feed-in for the output current path. Thereby two
emergency stop circuits can be monitored, and using the
24 V Safe output they can be forwarded to a PLC or a device,
e.g. a contactor, or also cascaded to a further u-remote sta-
tion. A switch-off delay of the 24 V Safe output can be set
using the DIP switches on the module. The undelayed status
is displayed with the SS1 output. Almost all Types of output
modules will be safely switched-off (SIL 3/Ple/Cat. 4) when
they are placed within the safety segment (see survey of
switchable modules in section 4.3).
Each time the supply voltage of the module has been
switched on the module has to be initialised manually by
giving a pulse of 0.1 to 2 seconds to the “Man Start” input.
As long as the supply voltage of the module has not been
interrupted the 24 V Safe output path will be reactivated
automatically when the “Autostart” input is used. In case
the “Man Start” input is used there is a pulse needed for the
reactivation.
The evaluation of test pulses in the safety circuits provides
the detection of faults or manipulations of the wiring. There-
fore every second a low pulse of 1 ms is being generated in
each circuit, these pulses are phase-shifted. The evaluation
of the test pulses can be activated or deactivated by setting
DIP-switches.
1
2
3
4
2
1
3
4
1
2
3
4
2
4
3
1
2
4
3
1
PF·O·2DI·DLY
1
2
3
4
2
1
3
4
1
2
3
4
2
4
3
1
2
4
3
1
PF·O·2DI·DLY
Safety
device with
OSSD
outputs
–
+
S 11
S 12
S 21
S 22
S 31
S 32
S 41
S 42
Man Start 1
Man Start 2
Autostart 1
Autostart 2
SS 1
24VSafe
24V
GND
or
S 11
S 12
S 21
S 22
S 31
S 32
S 41
S 42
Man Start 1
Man Start 2
Autostart 1
Autostart 2
SS 1
24VSafe
24V
GND
or
Connection diagram UR20-PF-O-2DI-DELAY-SIL
Safety sensors with OSSD outputs or standard PLC outputs
can be connected if the safety inputs are used in mode “no
test pulses”. In this case another safety review is obligatory.
The auxiliary outputs S 12, S 22, S 32, S 42, Man Start 2 and
Autostart 2 must only be used for refeeding the allocated
inputs.
The connections Safety Input 0 (S 11, S 21), Safety Input 1
(S 31, S 41), Man Start 1 and Autostart 1 are digital inputs
Type 3 according to EN 61131-2. The Man Start 1 input can
also be controlled by a standard PLC output.
In the case that several UR20-PF-O-xDI-SIL modules are used
in cascades please regard that the triggering of a UR20-PF-
O-xDI-SIL module will switch off the power supply of all sub-
sequent power-feed modules. A delay of these modules is no
longer effective.
The maximum feed-in current in the output current path is
8 A.
ATTENTION
Risk of material damage!
In the case of a maximum power supply of 8 A and a max-
imum temperature of +60 °C, all wired contacts on the
fourth connector must be connected with 1.5 mm² wiring!