ControlWave Express Instruction Manual (CI-ControlWave Express)
3.3.8 Connections to a Bristol Model 3808 Transmitter
You can connect a Bristol 3808 transmitter (digital) to the ControlWave
Express 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 Express
(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
ControlW
ave Express and the 3808 transmitter.
Figure 3-6. 3808 Transmitter to ControlWave Express RS-232 Comm. Cable Diagram
Figure 3-7 details RS-485 wiring connections required between the
ControlWave Express and the 3808 transmitter.
Note: For loopback and termination control, use switch SW3 on the
CPU/System Controller board to configure COM3.
3-14 I/O Configuration and Wiring Revised Mar-2011
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