7
(1) For 2-wire transmitter input
(2) For current input
*1 Use a 2-core twisted shielded wire for the power wire.
*2 Shows input resistance.
*3 To connect with the 2-wire transmitter, be sure to connect to P and I+/CHK+.
*4 Always use a ground. In addition, ground the FG of the power supply module.
*5 The check terminals (CHK+, CHK-) are used to check the amount of input in
mA in relation to the 2-wire transmitter output.
This can be checked since analog inputs of 4 to 20mA are converted to analog
outputs of 1 to 5V.
The relationship of this conversion can be expressed by the following formula:
IMPORTANT
Q66AD-DG needs to be powered on 30 minutes prior to operation for compliance
to the specification (accuracy).
Therefore, power on 30 minutes prior to offset/gain setting or after online module
change.
P
I+/CHK+
I-/CHK-
24V
24G
Transmitter
power
supply
Modulator Demodulator
Current
limiting
circuit
*2
250
*1 Shielded
*4
Analog output(V)
Analog input(mA)
1000
250

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