Yokogawa digitalYEWFLO (DY) - Manual (Page 57)

<7. OPERATION FOR THE BRAIN TERMINAL (BT200)>
7-1
IM 01F06A00-01EN
7. OPERATION FOR THE BRAIN
TERMINAL (BT200)
This chapter describes the operation procedures
using a BRAIN TERMINAL (BT200). For details
on the functions of the digitalYEWFLO, refer to
Chapter 6 “PARAMETERS.” List. And also, refer to
the “Model BT200 BRAIN TERMINAL” Instruction
Manual (IM 01C00A11-01E) for more detailed
Information.
7.1 Connection Method for the
BT200
(1) Connecting the BT200 to a 4 to 20mA
DC Transfer Line
The communication signal of the
digitalYEWFLO is superimposed onto the 4 to
20mA DC analog signal to be transferred.
digitalYEWFLO
SUPPLY
BT200 BT200 BT200 BT200
Inter mediate
terminals
4 to 20mA DC
Signal
transmission
line
Control room
Receiving
instrument
load
resistance:
WRŸ
Terminal
Board
SUPPLY
F0701.ai
Figure 7.1 Communicating for a 4 to 20mA DC
Signal Line
IMPORTANT
The communicable distance of the transmission
line is restricted depending on the wiring method.
Refer to Chapter 4 “WIRING.”
IMPORTANT
After setting a parameter, keep the power on for
at least 30 seconds.
If the power of fl owmeter is turned off, a
parameter setting is released.
(2) Connection of BT200 to Flow Converter
Removing a cover and indicator, the terminals
for BRAIN communication are provided on the
circuit board.
Connect BT200 to the terminal of HHT-COM on
the circuit board.
TP2 COM
HHT
P
F0702.ai
BT200
Display
Indicator Mounting
Screw (2 PCS) Circuit board
Figure 7.2 Connection of BT200 to Flow Converter