User Documentation

5 Detailed descriptions of safe modules | Safe power-feed module UR20-PF-O-2DI-SIL
59u-remote IP20 modules for functional safety manual 1484600000/07/11.2020
5.8 Safe power-feed module UR20-PF-O-2DI-SIL
Safe power-feed module UR20-PF-O-2DI-SIL (Order No. 1335050000)
The power-feed module UR20-PF-O-2DI-SIL enables the safe
feed-in for the output current path. The module ensures that
two emergency stop circuits can be monitored, and using
the 24V Safe output they can be forwarded to a PLC or also
cascaded to a further u-remote station. 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 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.
1
2
3
4
2
1
3
4
1
2
3
4
2
4
3
1
2
4
3
1
PF-O 2DI
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
24 V
24 V Safe
GND
or
Connection diagram UR20-PF-O-2DI-SIL
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 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!