Emerson OCX 8800 Instruction Manual page 52

OCX 8800
Figure 5-1. Signal Line Connections,
≥
250 Ohms Load Resistance
4-20 mA Terminal Block in
Electronics Housing
A OUT 1 +
A OUT 1 -
5-2
1
O 4-20 mA Signal Line
2
Loop
Connectors
HART Communicator
Rear Panel
Method 1, for Load Resistance
Refer to Figure 5-1 and the following steps to connect the HART
communicator to a signal line 250 ohms or more of load resistance.
Do not make connections to the HART communicator's serial port, 4-20 mA signal lines, or
NiCad recharger jack in an explosive atmosphere. Explosions can result in death or serious
injury.
Using the supplied lead set, connect the HART communicator in parallel to
the OCX 8800. Use any wiring termination points in the oxygen analog output
4-20 mA signal line.
Analog Output Device
HART
Communicator
Model 275/375
≥
250 Ohms
Instruction Manual
IM-106-880, Rev 1.0
January 2007
≥
RL 250Ω
Lead Set