User Documentation
7
Device description and application
1438130000/02/07-2018
2.1 Specialproductfeatures
• Stop category 0 according to EN 60204-1
• Application up through control category 4 accord-
ing to EN ISO 13849-1
• Reset button monitoring
• Single- and dual-channel activation
• Cross-connection detection
• 2 enable current paths, 1 signal current path
2.2 General
The safety relay in the SAFESERIES product family
is certied according to DIN EN 61508 / SIL3.
It is used for the safety-related switch-o (DTS = de-
energised to safe) of system components in the pro-
cessing industry segment such as combustion plants
(according to EN 746-2 and EN 50156) and for the
protection of personnel and machinery (emergency
stop).
2 Device description and application
2.3 Designandfunction
For safety-related switch-o, there are 2 monitor-
ing inputs with cross-connection detection, 2 enable
outputs (NO) and an acknowledgement output (NC)
with positively-driven contacts.
The output must be protected externally with maxi-
mum 5 A T.
The unit can be put into operation with either a fall-
ing edge at S33/S34 or with a rising edge at S33/
S35 (auto start). The response time for switching
on and o at A1/A2 can be reduced from > 50 ms to
< 20 ms by removing a bridge at C1/C2.
Activation of the safety circuit is done in the eld
through a PLC with a 24 V digital output at A1/A2
(bridged between S11/S12 and S21/S22) or with cor-
responding safety contacts (protective curtain, emer-
gency stop button) at S11/S12 and S21/S22 with a
xed operating voltage at A1/A2.
A reset is possible only by opening and closing both
monitoring circuits or by turning the operating volt-
age on and o.
Minimal current consumption of 35 mA at
24 V DC -10 % at the input is guaranteed.
Test pulses (typ < 1 ms) from a PLC for wire-break
recognition at A1/A2 do not result in the output relay
contacts switching on or o.