Advertisement
Safety Relays from IDEM
User Information
Applications
Depending on the application, the device must be wired with a IDEM basic device as shown in Fig. 1 to Fig. 2.If the devices
are wired inside a control cabinet (minimum degree of protection IP54), the fault involving a short circuit between the activa-
tion lines can be ruled out (protected wiring space). Category 4, PL e according to EN ISO 13849-1 is thereby possible.
If this fault cannot be ruled out, category 3, PL e is achieved.
Wiring
Feedback Loop
L+ / L
Power supply
and
Safety contacts
A1
A2
M / N
Commissioning
Note: The items listed under "Electrical connection" must be observed during commissioning.
Procedure
1. Wiring SEU-1:
Wire the SEU-1 with the IDEM basic device according to
your application (see Fig. 1 to Fig. 2).
2. Wiring basic device:
Wire the basic device according to the required Perfor-
mance Level determined (see user information for the basic
device).
3. Wiring feedback loop:
Wire the feedback loop as shown in Fig. 3 or Fig. 4.
4. Wiring power supply:
Connect the power supply to terminals A1 and A2 (Fig. 5).
Warning: Wiring only in de-energized state.
5. Starting the device:
Switch on the operating voltage.
SEU-1
Fig. 3: Feedback Loop
Contactors connected to the SEU-1 or the
basic devices are monitored via the feed-
back loop of the basic device. K
are the positively driven contacts of the
connected contactor or expansion module.
Fig. 5:
Power supply A1 and A2.
(Power supply according to techn.
Data )
SCR-...
SEU-1
Fig. 1: Connection of SEU-1 to basic device
Wiring of the SEU-1 via only 4 lines:
A safety contact of the basic devices (e.g. 13-14) activates the
relays of the SEU-1 (S11 and S15/S16).
Two lines on S23 and S24 are required for feedback/fault moni-
toring. According to the application, they have to be wired
according to Fig. 3 respective Fig. 4.
A fault in the SEU-1 thereby prevents the entire safety chain
from restarting.
Earth faults in the control lines are detected in addition to inter-
nal faults.
Fig. 2: Connection of several SEU-1 units to basic
device
If further SEU-1 units are to be integrated into the system, termi-
nals S11 must be connected in parallel on all SEU-1 units. This
also applies to terminals S10 and terminals S15/S16.
The feedback-loops (S23-S24) of the several expansion devices
have to be wired in series to the start of the basic device (see Fig.
3 respective Fig. 4).
Notice:
In order to activate earth fault monitoring, S10 must be con-
nected to PE (protective earth) on the AC115/230V devices.
With AC/DC 24 V, connect PE only to the power supply unit
according to EN60204-1.
and K
A
B
S21
S12
Warning:
If the "Automatic start" starting behavior is set on the basic
device, the safety contacts will close immediately.
If the "Monitored manual start" starting behavior is set, close
the start button on the basic device to close the safety
contacts.
The LEDs K1 and K2 on the basic device and on the SEU-1
are lit.
6. Triggering safety function:
Open the emergency stop circuit by actuating the connect-
ed safety switch. The safety contacts of the basic device
and the SEU-1 open immediately.
7. Reactivation:
Close the emergency stop circuit. If "Automatic start" is
selected on the basic device, the safety contacts will close
immediately.
If the "Monitored manual start" starting behavior is set, close
the start button on the basic device to close the safety
contacts of the basic device and the SEU-1.
Fig. 4: Feedback Loop with Auto-
Start
Contactors connected to the SEU-1 or the
basic devices are monitored via the feed-
back loop of the basic device. K
and K
A
B
are the positively driven contacts of the
connected contactor or expansion module.
Fig. 6:
Connecting load to safety contacts.
(Figure shows example.
Voltage „+V" according to techn.
Data)
H04
Ver. A
E61-326-00
Advertisement
