Emerson Rosemount OCX8800A - Page 83

5.2.2 Method 2: For load resistance < 250 ohms
WARNING
Explosive atmosphere
Explosions can result in death or serious injury.
Do not make connections to the Field Communicator's serial port, 4-20 mA signal
lines, or NiCad recharger jack in an explosive atmosphere.
Figure 5-2: Signal Line Connections, < 250 Ohms Load Resistance
A. 4-20 mA terminal block in electronics housing
B. O
2
4-20 mA signal line
C. Load resistance < 250 Ω
D. Analog output device
E. 250 ohms load resistor
(2)
F. Field Communicator
G. Field Communicator rear panel
H. Loop connectors
Procedure
1. At a convenient point, break the analog output 4-20 mA signal line and
install the optional 250 ohm load resistor.
(2)
Break the signal loop to insert the optional 250 ohm load resistor.
Manual Using HART
®
communications
00809-0500-4880 December 2022
Rosemount OCX8800A 83