Omron G3PW, User Manual

Page: 44 / 120

29
Wiring Section 3-3
• Use shielded twisted-pair wires for RS-485 communications wires. A
maximum of 500 m total of wiring can be used.
Terminal Names A screwless clamp terminal block is shown as an example.
Note A terminator must be connected at each end of the RS-485 trans-
mission path. The terminators must be at least 54
Ω
combined.
Wiring Inputs for External
Settings
Alarm Outputs
Automatic
Manual
Multi-drop (See note.)
Max. of 31 nodes
1. RS-485 (+)
2. RS-485 (
−
)
3. Main setting
4. Main setting COM
5. Duty setting
6. Duty setting COM
7. Alarm output 1 (+)
8. Alarm output 1 (
−
)
9. Alarm output 2 (+)
10. Alarm output 2 (
−
)
11. Event input (+)
12. Event input (
−
)
13. Reset input (+)
14. Reset input (
−
)
For standard models, 1 and 2
are not used.
Load
Load
+
−
+
−
EJ1 Modular Temperature
Controller, CJ-series Serial
Communications Unit, etc.
■
Wiring to Adjust the Main
Setting
■
Wiring to Adjust the Duty Setting
3. Main setting
4. Main setting
COM
Use a G32X-V2K
Variable Resistor
to adjust the main
setting.
3
1
2
Use a G32X-V2K
Variable Resistor to
adjust the duty setting.
5. Duty setting
6. Duty setting COM
3
1
2
Output status Open collector
Number of out-
puts 2
Maximum oper-
ating voltage 30 VDC
Maximum load
current 50 mA
Maximum resid-
ual voltage 1.5 V
Maximum leak-
age current 0.4 mA
1
2
3
4
5
6
7. Alarm output 1 (+)
8. Alarm output 1 (
−
)
9. Alarm output 2 (+)
10. Alarm output 2 (
−
)
11
12
13
14
Load
Load