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Operating Instructions
Safety Relay ESM-BA2..
Applications
Depending on the application or the result of the risk assessment according to DIN EN ISO 13849 1, the device must be wired as shown in Fig. 5 to Fig. 16.
Emergency stop circuit
Fig. 5: Dual-channel emergency stop circuit with
short circuit and ground fault monitoring
(category 4, up to PL e).
Fig. 8: Dual-channel sliding guard monitoring with
short circuit and ground fault monitoring
(category 4, up to PL e).
Starting behavior
Fig. 11: Monitored manual start. It is monitored
that the start button was opened before
the emergency stop buttons close (pre-
requisite: operating voltage must not be
interrupted).
Feedback loop
Fig. 13: Feedback loop. Monitoring of externally
connected contactors or expansion mod-
ules.
Power supply and safety contacts
Fig. 15: Connection of the power supply to terminals
A1 and A2 (power supply according to the
technical data).
Fig. 6: Dual-channel emergency stop circuit with
ground fault monitoring (category 3, up
to PL d).
Fig. 9: Dual-channel emergency stop circuit with
pnp semiconductor outputs/OSSD outputs
with short circuit detection (category 4,
up to PL e).
Fig. 12: Automatic start. Max perm. delay during
closing of the safety switches on S12
and S13:
S12 before S13: 300 ms
S13 before S12: any
Fig. 14: Feedback loop with automatic start. Mon-
itoring of externally connected contactors
or expansion modules.
Fig. 16: Connection to switching loads on safety
contacts (example contact configura-
tion. Differing according to device type.
Switching voltages +V corresponding to
technical data).
6
Fig. 7: Single-channel emergency stop circuit with
ground fault monitoring (category 1, up to
PL c).
Fig. 10: Connection to fail-safe control system (cat.
4, up to PL e)
Prerequisite: fault exclusion for short circuits (e.g.
according to EN ISO 13849-2; Table D4 - wiring in
protected wiring space) and control system also
meets requirements for cat. 4, PL e.
Notice:
To activate ground fault monitoring, S10 must
f
be connected to PE (protective earth) on the
AC115/230 V devices. With AC/DC 24 V, connect
PE only to the power supply unit according to
EN 60204-1.
For applications according to Fig. 9 and Fig. 10,
f
the following must be observed:
- The reference potential for the signaling device/
the control system and the safety relay must be
the same.
- It is to be ensured that any switch-on pulses
emitted by the signaling device (light test) do
not cause the safety relay to respond briefly and
should therefore in principle be deactivated.
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