I/o wiring – Rockwell Automation 20G PowerFlex 755 IP00 NEMA/UL Open Drive - Frames 8-10 User Manual
Page 59
Rockwell Automation Publication 750-IN020C-EN-P - May 2012
59
PowerFlex 755 IP00, NEMA/UL Open Type Drive
I/O Wiring
Important points to remember about I/O wiring:
•
Always use copper wire.
•
Wire with an insulation rating of 600V or greater is recommended.
•
Control and signal wires should be separated from power wires by at least
0.3 meters (1 foot).
•
For CE compliance, 115 volt digital input wiring must be shielded or must
not exceed 30 meters (98 feet) in length.
•
In order to maintain electrical safety for all user-accessible low voltage
circuits (ELV/PELV circuits), I/O terminals designated for 24V or lower
voltage must not be connected to a circuit of higher voltage or a circuit
which is not adequately insulated from dangerous voltages with double or
reinforced insulation within other connected equipment or wiring.
•
In order to provide electrical safety for user-accessible low voltage I/O
circuits which are referenced to earth (PELV circuits) and which may be
touched simultaneously, care should be taken to provide a common earth
reference for all equipment connected to the drive.
I/O Wire Recommendations
IMPORTANT
I/O terminals labeled “(–)” or “Common” are not referenced to earth ground
and are designed to greatly reduce common mode interference. Grounding
these terminals can cause signal noise.
ATTENTION: Hazard of personal injury or equipment damage exists when
using bipolar input sources. Noise and drift in sensitive input circuits can cause
unpredictable changes in motor speed and direction. Use speed command
parameters to help reduce input source sensitivity.
Type
Wire Type(s)
Description
Min. Insulation
Rating
Signal
(1) (2) (3)
Standard Analog I/O
–
0.750 mm
2
(18 AWG), twisted pair, 100% shield with drain.
300V,
75…90 °C
(167…194 °F)
Remote Pot
–
0.750 mm
2
(18 AWG), 3 conductor, shielded.
Encoder/Pulse I/O
<30 m (100 ft)
Combined
0.196 mm
2
(24 AWG) individually shielded pairs.
Encoder/Pulse I/O
30 to 152 m
(100 to 500 ft)
Signal
0.196 mm
2
(24 AWG) individually shielded pairs.
Power
0.750 mm
2
(18 AWG) in.dividually shielded pairs
Combined
0.330 mm
2
(22 AWG), power is 0.500 mm
2
(20AWG)
individually shielded pairs.
Encoder/Pulse I/O
152 to 259 m
(500 to 850 ft.)
Signal
0.196 mm
2
(24AWG) individually shielded pairs.
Power
0.750 mm
2
(18 AWG) individually shielded pairs.
Combined
0.750 mm
2
(18 AWG) individually shielded pairs.
Digital I/O
Safety Inputs
Homing Inputs
Unshielded
–
Per US NEC or applicable national or local code.
300V,
60 °C (140 °F)
Shielded
Multi-conductor shielded cable
0.750 mm
2
(18 AWG), 3 conductor, shielded.
(1) Control and signal wires should be separated from power wires by at least 0.3 meters (1 foot).
(2) If the wires are short and contained within a cabinet which has no sensitive circuits, the use of shielded wire may not be necessary, but is always recommended.
(3) I/O terminals labeled “(–)” or “Common” are not referenced to earth ground and are designed to greatly reduce common mode interference. Grounding these terminals can cause signal noise.
(4) Safety option modules 20-750-S and 20-750-S1 require shielded cable.