Yokogawa ADMAG CA - Manual (Page 52)

IM 1E8B0-01E
7-2
7. OPERATION VIA BRAIN TERMINAL
(2) Connecting the BT200 to a 4 to 20 mA DC Transfer Line
The communication signal of the ADMAG CA with the / BR function (optional specifi-
cation) is superimposed onto the 4 to 20 mA DC analog signal to be transferred.
Receiver resistance,
250
Ω
to 600
Ω
Intermediate
terminals
4 to 20 mA DC signal
transmission line
Control room
Terminal board
Receiving instrument
Figure 7.2 Communicating via a 4 to 20 mA DC Signal Line