External circuitry
10.3 Output circuit
3TK2826 safety relay
52 Manual, 08/2007, GWA NEB 926 1579-02 DS 02
10.3 Output circuit
Actuator circuit, category 4 in accordance with EN 954-1 / Safety Integrity Level (SIL) 3 in accordance
with IEC 61508
13
23
14 24
K1
K2
Figure 10-1 Category 4 in accordance with EN 954-1 / Safety Integrity Level (SIL) 3 in accordance
with IEC 61508
Actuator circuit, category 3 in accordance with EN 954-1 / Safety Integrity Level (SIL) 2 in accordance
with IEC 61508
13
23
14 24
K1 K2
Figure 10-2 Category 3 in accordance with EN 954-1 / Safety Integrity Level (SIL) 2 in accordance
with IEC 61508
In the case of safe laying between terminal 14 and the actuators, up to cat. 4 in accordance
with EN 954-1/SIL3 in accordance with IEC 61508.
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