MERIDIAN
UNIVERSAL GAS DETECTOR
INSTALLATION
4-29
USE AND DISCLOSURE OF DATA
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5. Connect positive (+) and negative (-) leads from devices to TB2 on the terminal/relay/MODBUS RS-485
PCB (refer to
Connection for 3-Wire Sourcing
and
for details).
6. Locate SW1 (isolated/non-isolated) on the power supply PCB. Place SW1 in the DOWN position (refer to
Sourcing and Sinking Non-Isolated (SW1) Settings
).
7. Locate J3 (WiredHART) on the power supply PCB. Place J3 in the correct position to support your application
(refer to
).
8. Insert the lower PCB stack into the housing after wiring the terminal blocks.
9. Insert and tighten the four (4) standoffs.
10. Push the LCD PCB/CPU PCB set into the four (4) standoffs.
11. Install housing cover, tighten and secure the setscrew.
12. Apply power to the receiver.
Table 4-10: Sourcing and Sinking Non-Isolated (SW1) Settings
SW1 Isolated/Non-Isolated
SW1 Settings
DOWN Position
Table 4-11: WiredHART (J3) Settings
SW1 Isolated/Non-Isolated
SW1 Settings
For Normal = Position 3&5 for -/+
For Hart = Position 1&3 for -/+
NOTE: J3 only pertains to the WiredHART PCB.
NOTE: Do not mix Sinking and Sourcing on the same PCB.