Emerson Process Management ControlWave XFC - Manual (Page 65)

CI-ControlWave XFC Installation & Operation / 2-23
2.3.5 Connection to a Model 3808 Transmitter
A Model 3808 Transmitter (Digital) can be interfaced to a ControlWave XFC via either an
RS-232 or an RS-485 communication scheme. Communication schemes and cable lengths
are determined the type of communication port utilized. In general RS-232 communications
are utilized when the Model 3808 Transmitter is situated within 25 feet of the
ControlWave XFC, i.e., for local communications. Communications can be achieved with
transmitters up to 4000 feet away (remote communications) via the RS-485 scheme.
Term. Plate
Term Block
To
GND
To
RXD
To
TXD
RS-232
RS-232
3808
POWER
Notes:
Loop Wires = AWG 24
Cable Wires = AWG 22
(COM2)
10 = RTS
11 = CTS
12 = DTR
13 = DCD
To V-
8
14
RXD
RTS
CTS
DTR
DCD
TXD
G
NE
T
W
O
RK
14 = GND
8 = TXD
To R
To +
To
9 = RXD
To T
TR-
TR+
G
+V
RS4
85
J2
1 = PWR
4 = PWR+
Figure 2-13 - Model 3808 Transmitter to CW XFC - RS-232 Comm. Cable Diagram
Notes:
Loop Wires = AWG 24
Cable Wires = AWG 22
(COM3)
RS-485
To +
3 = TR+
To -
2 = TR-
Term. Plate
Term Block
To + Power
Power To
TR-
TR+
G
+V
RS
48
5
J2
1 = PWR
4 = PWR+
To
TX/RX
(+)
To
TX/RX
(-)
RS-485
Figure 2-14 - Model 3808 Transmitter to CW XFC - RS-485 Comm. Cable Diagram