IM 12D08N04-01E
3-5
3. Installation and Wiring
3-2. Preparation
Refer to figure 3-5. The relay contact terminals and power supply connections are under
the screening (shielding) plate. These should be connected first. Connect the sensor and
outputs last.
To open the EXA 402 for wiring:
1. Loosen the four frontplate screws and remove the cover.
2. Use the rubber knob in the lower righthand corner and swing open the display board
to the left.
3. The upper terminal strip is now visible.
4. Remove the screen (shield) plate covering the lower terminal strip.
5. Connect the power supply and contact outputs. Use the three glands at the back for
these cables.
6. Replace the screen (shield) plate over the lower terminals.
WARNING
Always replace the screen plate over the power and contact outputs for safety and to
minimise noise pickup.
7. Connect the analog output(s) and the sensor input.
8. Use the front three glands for analog output, sensor input and contact input (see
figure 3-5).
9. Close the display board and switch on the power. Commission the instrument as
required or use the default settings.
10. Replace the cover and secure frontplate with the four screws.
Contact
(S3,S4,FAIL)
output
cables
Sensor
cables
Contact
(S1, S2)
output
cables
Analog
output
cables
Power
cable
Contact
input
Suitable for cables with an outside diameter between 6 to 12 mm.
High voltage section
Figure 3-5. Glands to be used for cabling