98 UDC3300 Limit Controller Product Manual 1/01
9.4 Recommended Wiring Practices
General rules
• All wiring must conform to local codes and practices.
• Wires carrying similar types of signals (Table 9-1) may be bundled
together, but bundles with different types of signals must be kept
separated to prevent inductive or capacitive coupling.
Wire bundling
Table 9-1 shows what wiring should be bundled together to prevent
inductive or capacitive coupling.
Table 9-1 External Wiring
Wire Function
Are Shielded
No. Type Bundle No.
Twisted Wires
Recommended?
1
2
3
HIGH VOLTAGE
Line Power
Earth Ground
Line Voltage
Digital I/O
1NO
4
5
ANALOG I/O
Process Variable
RTD
Thermocouple
dc Millivolts
Low level (<100V)
4-20 mA dc
1-5 Vdc
2 YES
6
7
DIGITAL I/O
Low Voltage (<100V)
Computer Interface
3 YES
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