Baker Hughes PanaFlow Z1G, User Manual

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2.4.5.2 Wiring an RTD inputs option card
The PanaFlow Z1G/Z2G Process Gas Flowmeter RTD
inputs option card provides two or four direct RTD inputs
(designated as A, B, C and D). Each RTD input requires three
wires, and should be connected as shown on the label in the
rear cover (see Figure 9 on page 7 ).
Before making any connections, complete the steps in
“Making the Electrical Connections” on page 10.
2.4.5.3 Wiring a Modbus option card
A Modbus option card uses the RS485 standard for
communication, and it must be installed in Slot 2. The RS485
standard allows up to 32 nodes (drivers and receivers) on
one multi-drop network, at distances up to 4000 ft (1200
m). Panametrics recommends using 24-gauge (24 AWG)
twisted-pair wire with a characteristic impedance of 120 Ω
and 120 Ω termination at each end of the communications
line.
Note: The Modbus option card provides its own RS485
connections.
2.4.5.4 Wiring the HART interface
To connect the HART interface, refer to Figure 13 on page 14
and proceed as follows:
1. Connect the HART Net (+) wire to pin #1.
2. Connect the HART Net (-) wire to pin #2.
3. Connect the optional cable shield to pin #3.
2.4.5.5 Wiring the Foundation Fieldbus interface
To connect the Foundation Fieldbus interface, refer to Figure
13 on page 14 and proceed as follows:
1. Connect the Fieldbus Net (+) wire to pin #1.
2. Connect the Fieldbus Net (-) wire to pin #2.
3. Connect the optional cable shield to pin #3.
WARNING!
Make sure both covers, with their o-ring seals,
are installed and the set screws tightened
before applying power in a hazardous
environment.
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