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Connections
Depending on the type of transducer that is being used for process feedback, the wiring will be
different. The connection diagrams below show how to connect a 2-wire transducer and a 4-wire
transducer to the Q9.
2-Wire
When using a 2-wire transducer with a Toshiba drive, it is usually
powered from the P24 terminal (24 Vdc supply). The positive
terminal of the transducer is connected to P24 and the feedback
Pressure Transducer
signal (4-20 mA) is connected from the negative terminal to the V/I
(2-Wire)
terminal.
-
+
Because the V/I terminal is an isolated analog input and the
transducer is powered from P24, the current loop will not be
complete. A jumper will need to be placed between CC and IICC
to make the V/I terminal non-isolated.
P24
V/I
CC
IICC
4-Wire
A 4-wire transducer is powered from an external source and does
not use the drive for power. Two of the wires will connect to the
external power source.
The feedback signal will be connected
from the positive terminal of the transducer to the V/I terminal of
the drive. The return for the current loop will be connected from
the negative terminal of the transducer to the IICC terminal of the
drive.
Because the transducer is not being powered from the Q9, the V/I
terminal can remain isolated and there is no need to connect CC to
IICC.
Note:
When using a 4-20 mA signal as feedback into the V/I terminal, be
sure to set SW 301 to "I".
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192
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