Mitsubishi Electric A1S66ADA User Manual page 35

4 PROCEDURES AND SETTINGS BEFORE OPERATION
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(2) CH3 to CH6
(a) For voltage input
Signal source
0 to
(b) For current input
Signal source
0 to
Power supply module
1 Use a two-core twisted shield line for the power cable.
2 Indicates the A1S66ADA input resistance.
3 When noise or ripple occurs with the external cable, connect a condenser
with about 0.1 to 0.47 μ F(Part with voltage resistance of 25V or more)
between the terminal V+I+ and V-I-.
4 The FG terminal of the power supply module should always be grounded.
5 Make sure to connect between the FG of the power supply module and the
FG of A1S66ADA.
6 Due to noise in the environment, AG terminal may attain better accuracy
when grounded.
POINT
• The FG terminal of A1S66ADA and the FG terminal of the power supply module
are not connected.
• In an unused channel, if terminals remain open, an erratic digital value may be
output.
To prevent this, take any of the following measures.
1. Short-circuit the input terminals (terminal V+I+ and V-I-) of the unused channel.
2. Connect the AG terminal to the GND terminal of the external device.
*3
CH3
10
V+I+
SLD
*1 Shield
CH6
10
V+I+
SLD
FG
*5
*6
*4
MELSEC-A
500k
500k
V-I-
*2
500k
250k 500k
V-I-
FG
AG
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