PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
1-14 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 Spacing
Notes,
page 1-15
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)
03/9 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, Count
Pulse Tach
Shielded Cable
– Belden 9728,
9730
Signal
(Comm.)
9 Serial
Communication
RS-232
(20-COMM-R), 422
To Te r minals/
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)
Note: Cells removed from example table for clarity only.
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