Devices For Ex Zone 2 (Ec 921 And Ec 922) - RMG EC 900 Operating Instructions Manual

INSTALLATION
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Devices for Ex zone 2 (EC 921 and EC 922)

The versions for Ex zone 2 may not be operated in Ex zone 1. In Ex zone 2 it is not nec-
essary to provide electrical isolation in order to connect other equipment. If the devices
are powered externally, make sure that the power supply is correct. A device with a 24
V power pack may not be connected to 230 V. The connection schema shown in the
figure below corresponds to the latest revision 8.
28
L/
N/+
Batt
PE
Power supply
Make sure that the device is earthed (earthing screw on the right side)! In order to connect the de-
vice to the equipotential bonding, use a wire diameter of 4 mm².
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Power pack
+ +
01 02
Digital outputs
+ + +
Vo E4 C3
channel
Enco Digital inputs
+ + +
03 04 E5
Digital inputs 5 to 8
+ +
+ +
Ref. Measuring
channel
Volume meter
Modem or
Ethernet con-
nection
Earthing screw
+ + +
E6 E7 E8
+ +
Iin1 Iin2
PT 1000 Current in-
puts