Cable and wiring recommendations, Example – Rockwell Automation 20P PowerFlex Digital DC Drive User Manual
Page 44
44
Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 1
Installation and Wiring
Cable and Wiring
Recommendations
Use the following cable and spacing recommendations for all drives sizes:
Example:
Spacing relationship between 480V AC incoming power leads and 24V DC logic
leads:
•
480V AC leads are Class 2; 24V DC leads are Class 6
•
For separate steel conduits, the conduits must be 3 inches (76 mm) apart
•
In a cable tray, the two groups of leads are to be 6 inches (152 mm) apart
Minimum Spacing Between Classes - Steel Conduit/Tray
Category Wiring
Class
Signal Definition
Signal Example
Cable Type
1
2/3/4
5/6
7/8
9/10/11
See Cable
Spacing
Notes, on
Power
1
AC Power (600V Or
Greater)
2.3kV 3/ph AC Lines
Per NEC & Local
Codes
0
3/9 in.
(76/229 mm)
3/9 in.
(76/229 mm)
3/18 in.
(76/457 mm)
See Note 6
1/2/5
2
AC Power (Less Than
600V)
460V 3/ph AC Lines
3/9 in.
(76/229 mm)
0
3/6 in.
(76/152 mm)
3/12 in.
(76/305 mm)
See Note 6
1/2/5
3
DC Power
DC Motor Armature
4
DC Power
DC Motor Field
Control
5
115V AC/DC Logic
Relay Logic/PLC I/O
Motor Thermostat
3/9 in.
(76/229 mm)
3/6 in.
(76/152 mm)
0
3/9 in.
(76/229 mm)
See Note 6
1/2/5
115V AC Power
Power Supplies,
Instruments
6
24V AC/DC Logic
PLC I/O
Signal
(Process)
7
Analog Signals, DC
Supplies
Reference/Feedback
Signal, 5 To 24V DC
Shielded Cable –
Belden 8735,
8737, 8404
3/18 in.
(76/457 mm)
3/12 in.
(76/305 mm)
3/9 in.
(76/229 mm)
0
1/3 in.
(25/76 mm)
2/3/4/5
Digital (Low Speed)
TTL
8
Digital (High Speed)
I/O, Encoder, Resolver,
Count Pulse Tach
Shielded Cable –
Belden 9728, 9730
Signal
(Comm.)
9
Serial Communication
RS-232 (20-COMM-R),
422 To Terminals/printers
Shielded Cable –
Belden RS-232 –
8735, 8737 RS-
422 – 9729, 9730
See Note 6
1/3 in.
(25/76 mm)
0
–
11
Serial Communication
(Greater Than 20k Baud)
PLC Remote I/O, PLC Data
Highway
Twinaxial Cable –
Belden 9463, A-B
1770-CD
Minimum Spacing Between Classes Steel Conduit/Tray
Category
Wiring
Class
Signal Definition
Signal Example
1
2/3/4
5/6
Power
2
AC Power (less
than 600V)
460V 3/Ph AC Lines
3/6 in.
(76/152 mm)
Control
6
24V AC/DC Logic
PLC I/O
3/6 in.
(76/152 mm)