![background image](http://html1.mh-extra.com/html/yokogawa/exa-do402g/exa-do402g_instruction-manual_3467515019.webp)
IM 12J6B3-E-H
Installation and wiring 3-3
3-2. Preparation
Refer to figure 3-4. The relay contact terminals and power supply connections are under the screening
(shielding) plate. These should be connected first. Connect the sensor, outputs and data communication
connections 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 right hand 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.
Always replace the screen plate over the power and contact outputs for safety and to avoid
interference.
7. Connect the analog output(s), the sensor input, and, if necessary, the RS485 serial bus.
8. Use the front three glands for analog output, sensor input, contact input and communication cabling
(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.
Figure 3-5. Glands to be used for cabling
WARNING
Suitable for cables with an outside diameter between 7 - 12 mm (9/32 -
15/
32 in.)
Contact
(S3,S4,FAIL)
output
cables
Sensor
cables
Contact
(S1,S2)
output
cables
Analog
output
cables
Power
cable
Communi-
cation,
contact
input
High voltage section
Summary of Contents for EXA DO402G
Page 2: ......
Page 6: ...IM 12J6B3 E H...
Page 16: ...IM 12J6B3 E H...
Page 60: ...IM 12J6B3 E H...
Page 74: ...IM 12J6B3 E H...
Page 76: ...IM 12J6B3 E H...