Emerson Process Management Bristol ControlWave ExpressPAC - Manual (Page 60)

ControlWave ExpressPAC Instruction Manual (CI-ControlWave EPAC)
3.3.8 Connections to a Bristol Model 3808 Transmitter
You can connect a Bristol 3808 transmitter (digital) to the ControlWave
ExpressPAC through either an RS-232 or RS-485 port. Communication
schemes and cable lengths determine the type of communication port
you need to use. In general RS-232 communications require that you
place the 3808 transmitter within 25 feet of the ControlWave
ExpressPAC (local communications). You can use RS-485
communications to reach transmitters up to 4000 feet away (remote
communications).
Figure 3-6 details RS-232 wiring connections required between the
ControlWave ExpressPAC and the 3808 transmitter.
3-14 I/O Configuration and Wiring Revised Mar-2011
Figure 3-6. 3808 Transmitter to ControlWave ExpressPAC RS-232 Comm. Cable Diagram
Figure 3-7 details RS-485 wiring connections required between the
ControlWave ExpressPAC and the 3808 transmitter.
Note:
For loopback and termination control, use switch SW3 on the
CPU/System Controller board to configure COM3.
CW ExpressPAC