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Instruction Manual
IM-106-880C, OI
September 2009
2-9
Hazardous Area OCX 8800
Connect Output Signals
The Hazardous Area OCX 8800 may be provided with either two 4-20 mA
signals with HART on the O2 signal or a single FOUNDATION fieldbus signal.
Connect the output terminals in the electronics housing as shown in
Figure 2-6. Use individual shielded twisted wire pairs. Terminate the shield at
the electronics housing.
O
2
4-20 mA Signal
One 4-20 mA signal represents the O
2
value. Superimposed on the O
2
signal is the HART information accessible through a Model 375 Handheld
Communicator or AMS software. The O
2
signal is at the AOUT 1 terminals.
COe 4-20 mA Signal
Another 4-20 mA signal at the AOUT 2 terminals represents the COe
value.
FOUNDATION fieldbus Signal
The FOUNDATION fieldbus signal provides all output information and is
accessible through a Model 375 handheld communicator.
Alarm Output Relay
Connect any customer-supplied relay input to the alarm output relay terminal.
Use shielded wire and terminate the shield at the electronics housing. The
alarm output relay terminal is a set of dry, no. 2, form C, contacts with 30 mA,
30 VDC capacity.
Remote Electronics Connections to Sensor Housing
Make the following connections between the remote electronics and sensor
housings with the electronics cable ordered with the package (Figure 2-7).
Braided cable is available in lengths up to 150 ft. (46 m).
NOTE
Interconnect wiring shown is for Rosemount Analytical supplied cables. For
customer furnished interconnect wiring or cables, refer to Figure 2-8.
Signal Connections
Connect the electronics housing terminals to the corresponding terminals
in the sensor housing. The twisted wire pairs are numbered on the inner
plastic wrapper. Keep twisted pairs together and match the numbers and
wire colors shown in Figure 2-7.
Heater Power Connections
Use the blue, white, orange black, red, and yellow stranded wires in the
heater power cable to connect power to the three heaters in the sensor
housing. Match the wire colors to the corresponding heater power terminal
blocks in the sensor and electronics housings as shown in Figure 2-7.