Chapter 3: Wiring
Firmware – S1043
Revision: 2 (9/98)
39
© Saftronics, Inc.
3.5
Wiring Control Circuit Terminals
A control signal line must not be longer than 50 meters (164 feet) and must be separated from power lines. The frequency
reference must be input to the Inverter through twisted-pair wires.
3.5.1
Wire Sizes and Closed-Loop Connectors
Terminal numbers and wire sizes are shown in
Table 3.7
.
Table 3.7
Terminal Numbers and Wire Sizes (Same for all Models)
Terminals
Terminal Screws
AWG Sizes
Wire Thickness (mm
2
)
Wire Type
1 to 11, 13 to 33
M3.5
20-16
Stranded wire: 0.5 to 1.25
Single wire: 0.5 to 1.25
•
Shielded, twisted-pair wire
12 (G)
M3.5
20-14
0.5 to 2
•
Shielded, polyethylene-
covered, vinyl sheath cable
The closed-loop connectors and tightening torques for various wire sizes are shown in
Table 3.8
.
Table 3.8
Closed-Loop Connectors for Ground Terminal
Terminals
Terminal Screws
Crimp Size
Tightening Torque (n - m)
0.5
1.25 to 3.5
0.75
1.25 to 3.5
1.25
1.25 to 3.
2
M3.5
2 to 3.5
0.8
