Emerson Rosemount 8732EM Quick Start Manual page 24

Quick Start Guide
Table 5-6:
Power system
DC low power
Power terminals
For AC powered transmitter (90–250VAC, 50/60 Hz):
• Connect AC Neutral to terminal 9 (AC N/L2) and AC Line to terminal 10
(AC/L1).
For DC powered transmitter:
• Connect negative to terminal 9 (DC -) and positive to terminal 10 (DC +).
• DC powered units may draw up to 1.2A.
Cover jam screw
For flow meters shipped with a cover jam screw, the screw should be installed
after the instrument has been wired and powered up. Follow these steps to
install the cover jam screw:
1. Verify the cover jam screw is completely threaded into the housing.
2. Install the housing cover and verify the cover is tight against the housing.
3. Using a 2.5 mm hex wrench, loosen the jam screw until it contacts the
transmitter cover.
4. Turn the jam screw an additional 1/2 turn counterclockwise to secure the
cover.
Note
Application of excessive torque may strip the threads.
5. Verify the cover cannot be removed.
5.7 Modbus output
The Modbus output is a Modbus RTU signal using RS-485. Follow these cable
recommendations for RS-485 interface (Modbus over serial line).
Cable characteristics
Type
24
Fuse requirements (continued)
Power supply
12–30VDC
Fuse rating
3 Amp quick acting
Shielded twisted pair cable with 2
conductors and a drain wire, or Ethernet
cable of Cat 5/5e/6
Rosemount 8732EM Transmitter with Modbus Protocol
November 2017
Manufacturer
Bussman AGC3 or
equivalent