Siemens SIPROCESS GA700 Compact Operating Instructions page 182

Connecting
5.2 Electrical connections
Note
Application with type of protection Ex py or Ex ec
In the case of operation with type of protection Ex py or Ex ec, firm seating of the IEC
connector at the power supply unit has to be ensured with a guard bracket fastened to the
device enclosure.
Procedure
1. Undo the six screws
2. Remove the shield plate
3. Unscrew the union nut of the cable gland
4. Insert the connecting cable through the cable gland
5. Press the wire end ferrules (VDE 0100 Part 520) onto the ends of the wires. Then
connect the wires of the connecting cable to the IEC connector
Make sure that the power supply and PE conductor connections are correct!
Tighten the screws to the appliance plug with a torque of
– 0.5 Nm at the terminals
– 0.3 Nm at the strain relief and the connector housing.
6. Connect the appliance plug
7. In case of operation with type of protection Ex py or Ex ec: Place the supplied guard
bracket over the IEC connector and screw it to the enclosure. The torque is 2.5 Nm.
8. Fasten the connecting cable in the cable gland
torque of 3 Nm.
9. Place the shield plate
10.Close the door of the wall-mounted device and tighten the six screws
11.Connect the device to the equipotential bonding
with spring washer to the threaded bolt M4.
60
③
and open the door of the wall-mounted device.
④
on the right side panel. To do this, loosen the screws.
⑤
②
to the power supply unit
④
back into the wall-mounted device and fasten it with screws.
Compact Operating Instructions, 11/2019, A5E35134047-04
.
⑤
.
②
at the marked position.
①
.
⑤
. To do this, tighten the union nut with a
⑥
. To do this connect the ring cable lug
Devices in explosion-proof design
③
again.