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6.2
Terminal Wiring and Marking (Remote Type)
TERMINAL BLOCKS
Terminal
Description
LN+
Power Input
LN-
Power Input
F/P-
Pulse/Frequency Output Ground
F/P+
Pulse/Frequency Output Positive
DOA- (DO-)
Alarm Output Ground
DOA+ (DO+)
Alarm Output Ground
DOB-
Reservation
DOB+
Reservation
DIN-
Reservation
DIN+
Reservation
TRX+
Communication Input (RS485-A)
TRX-
Communication Input (RS485-B)
IOUT-(IO-)
Current Output Ground
IOUT+(IO+)
Current Output Positive
EXT+
Excitation Current Positive
EXT-
Excitation Current Negative
SIG+
Signal 1
SGND
Signal Ground
SIG-
Signal 2
DRS+
Excitation Shield Positive
MTDR
Excitation Shield Ground
DRS-
Excitation Shield Negative
6.3
Connection Wire and Cable Characteristics and Connection Requirements
6.3.1 Flow Signal Wire
This converter provides equipotential excitation shielding signal output voltage to reduce the influence
of the distributed capacitance of the cable transmission on the current signal measurement. When the
measured conductivity is less than µ or long-distance transmission, dual-core, dual-shielded signal cables
with equipotential shielding can be used. For example, STT3200 dedicated cable or BTS type triple shielded
signal cable.
6.3.2 Excitation Current Wire
The excitation current line adopts a two-core insulated rubber flexible cable, and the recommended model is
RVVP2*0.3mm². The length of the excitation current line is the same as the length of the signal cable. When
using STT3200 dedicated cable, the excitation cable and signal cable are combined into one.
Fig.6.2 Remote-Type Terminal Diagram
