Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 33)

2–15 Installation
Publication 1397-5.0 — June, 2001
If more than two SCANport modules are used with the 1397 Drive,
an additional 24V DC power supply must be installed, or 115V
SCANport modules must be used. Refer to the SCANport user
manual for information on installing additional SCANport modules.
The 24V DC power supply can be accessed at terminals #14 (24V
DC) and #15 (24VDC common) of the regulator board terminal strip.
24V DC Power Supply
14
15
+24V
24V COM
Wire sizes must be selected individually, observing all applicable
safety and NEC regulations. The minimum permissible wire size
does not necessarily result in the best operating economy. Due to the
Drive overload capacity, the conductors for the transformer primary
and secondary must be sized (at a minimum) for 125% of the full
load Drive line current. The motor armature conductors must also be
rated for 125% (at a minimum) of the full load motor current.
Shielded type wire is recommended in control circuits for protection
against interference. A shielded wire is required for all signal wires.
The recommended conductor size must be a minimum of 24 AWG.
The best interference suppression is obtained with a wire having an
individual shield for every pair. Table 2.B provides a listing and
description of cable types and wiring recommendations. Figure 2.9
shows recommended cable shielding. Note that wiring classes are
for reference only, and are not associated with any code or standard.
Figure 2.11
Cable Shielding Recommendations
2 Conductor
Shielded Cable
2 Conductor Shielded Cable
Multi-Conductor Shielded
Cable with Individual
Shielded Pairs
Shield
Shield
Shield
Shield Connection
Terminal;
Symbol
Wire Size, Type & Class