Chapter 4
Wiring
Wiring should be performed in the following order:
1. Power to the transmitter and detector
2. The detector to the transmitter
3. Optional wiring:
a. Relay contacts
b. 4–20 mA current output(s)
c. Contact closure inputs
d. Optional temperature compensation board to the transmitter
e. Serial communications
Preparation reparation
Review the following carefully prior to connecting any wiring.
Warning Remove all power from the unit before making any connections.
Electrocution can result if power is present. ▲
Warning All wiring must be done by qualified individuals in accordance
with applicable codes such as the NEC (National Electric Code)
ANSI/NFPA 70 specifications or the Canadian Electrical Code Part 1.
Only approved conduit, boxes, and fittings may be used.
▲
Warning Do not apply power to the unit in any hazardous area unless the
safety ground is properly wired inside the unit and the cover is properly
installed. ▲
Thermo Fisher Scientific DensityPRO+ Installation Guide 4-1
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