Emerson Rosemount 8600 Series - Electrical Wiring and Connections

Quick Start Guide
11
September 2016
5.0 Connect wiring and power up
5.1 Conduit installation
Prevent condensation in any conduit from flowing into the housing by mounting
the flowmeter at a high point in the conduit run. If the flowmeter is mounted at a
low point in the conduit run, the terminal compartment could fill with fluid.
If the conduit originates above the flowmeter, route conduit below the flowmeter
before entry. In some cases a drain seal may need to be installed.
Figure 10. Proper Conduit Installation with Rosemount 8600D
A. Conduit line
Use the following steps to wire the flowmeter:
1. Remove the housing cover on the side marked FIELD TERMINALS.
2. Connect the positive lead to the “+” terminal and the negative lead to the “-”
terminal as shown in Figure 11 for HART installations.
3. For HART installations utilizing the pulse output, connect the positive lead to
the “+” terminal of the pulse output and the negative lead to the “-” terminal
of the pulse output as shown in Figure 11. A separate 5 to 30 Vdc power
supply is required for the pulse output. Maximum switching current for the
pulse output is 120 mA.
Figure 11 shows wiring connections necessary to power a Rosemount 8600D and
enable communications with a hand-held Field Communicator.
4. Plug and seal unused conduit connections. Use pipe sealing tape or paste on
threads to ensure a moisture-tight seal. Housing conduit entries marked with
M20 will require M-20 x 1.5 blanking plug thread. Unmarked conduit entries
will require a 1/2 - 14 NPT blanking plug thread.
Do not connect the powered signal wiring to the test terminals. Power could damage the test diode in the
test connection. Twisted pairs are required to minimize noise pick up in the 4 - 20 mA signal and digital
communication signal. For high EMI/RFI environments, shielded signal wire is required and preferred in all
other installations. Use 24 AWG or larger wire and do not exceed 5,000 feet (1,500 meters). For ambient
temperatures above 140 °F (60 °C) use wire rated to 176 °F (80 °C).
AA