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3-1
Settings
3-1-1 Wiring
•
Connect a two-conductor twisted-pair shielded cable to the Analog Input Unit.
•
The input terminals of the Analog Input Unit, to which the two-conductor
twisted-pair shielded cable is connected, vary with the input range as shown in
the following illustrations. In some environments, the shielded wire of the two-
conductor twisted-pair cable should be connected to the COM terminal instead
of the FG terminal of the Analog Input Unit so that the Analog Input Unit will not
be influenced by external noise.
•
The COM terminal is internally connected to the analog 0-V terminal of the
Analog Input Unit.
Voltage Input
V–
I+
COM
FG
V+
FG
0 V
Current Input
Short-circuit the V+ and I+ terminals for current input.
0 V
V–
I+
COM
FG
V+
FG
3-1-2 Wiring Precautions
In order to prevent noise interference, note the following when wiring the Analog
Input Unit:
•
Do not install power lines or high-tension lines along in close proximity to the
Analog Input Unit’s input lines.
•
When connecting an inductive load such as a relay, solenoid, or electromagnet
valve to the Analog Input Unit, be sure to insert a surge absorption diode or
surge absorber to the load circuit as shown in the following examples. The
surge absorption diode or surge absorber must be as close as possible to the
inductive load in the load circuit. The withstand voltage of the surge absorption
diode must be at least five times as large as the circuit voltage.
DC Relay
Surge absorption diode (Fuji Den-
ki’s ERB44-06 or equivalent)
DC
Settings
Section 3-1
Summary of Contents for CQM1H - 08-2005
Page 1: ...Cat No W238 E1 8 Dedicated I O Units CQM1H CQM1 series OPERATION MANUAL SYSMAC ...
Page 2: ......
Page 3: ...CQM1H CQM1Series Dedicated I O Units Operation Manual Revised August 2000 ...
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Page 21: ...1 PART I B7A Interface Unit CQM1 B7A02 CQM1 B7A03 CQM1 B7A12 CQM1 B7A13 CQM1 B7A21 ...
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Page 45: ...25 PART II G730 Interface Unit CQM1 G7M21 CQM1 G7N01 CQM1 G7N11 ...
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Page 74: ...Appendix A Specifications 54 Dimensions Common for Master and Expansion Master Unit mm ...
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Page 79: ...59 PART III I O Link Unit CQM1 LK501 ...
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Page 93: ...73 PART IV Analog Input Unit and Analog Power Supply Units CQM1 AD041 CQM1 IPS01 CQM1 IPS02 ...
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Page 121: ...101 PART V Analog Output Unit and Analog Power Supply Units CQM1 DA021 CQM1 IPS01 CQM1 IPS02 ...
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Page 187: ...167 PART VII Linear Sensor Interface Units CQM1 LSE01 CQM1 LSE02 ...
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