Rockwell Automation SD3100 DISTRIB PWR SYS SD3100 DC PWR MODULE - Manual (Page 38)

3-4 SD3100 Power Modules
3.4 Wiring AC Input to the Field Power Module
AC power connections to the single-phase Field Power Module are made to terminal
block TB2 at the bottom left of the control compartment. Phase control for the Field
Power Module is determined by the PMI Regulator, which also controls phasing for the
armature power devices. The Field Power Module’s AC input terminals must be
connected to AC input lines L1 and L3 through an isolation transformer. Terminal block
TB2 has been provided for these connections.
3.4.1 Installing the Field Isolation Transformer
The field isolation transformer should be installed at an appropriate location external
to the Power Module, and in conformance with the NEC/CEC and all applicable local,
national, and international codes. The transformer’s input fuse ratings and required
minimum wire sizes for use with the Field Power Module are listed in table 3.2.
Wire the field isolation transformer as shown in figure 3.2. Connect terminal 31 on TB2
to H2 on the field isolation transformer and terminal 30 to H1. Connect X1 to terminal
L1A and X2 to terminal L3A.
Important: The isolation transformer must be connected to terminal block TB2 as
shown in figure 3.2. Improper drive regulation and/or fuse clearing may
result if the Field Power Module’s AC inputs are incorrectly wired.
Table 3.2 – Isolation Transformer Wiring Requirements
Field Power Module
(Amps)
Isolation Transformer Fuse
Rating (Maximum Amps)
Minimum Required
Wire Size (AWG)
15 30 #10
60 100 #4
Figure 3.2 – Field Terminal Wiring
FIELD
ISOLATION
TRANSFORMER
35 37 L1
A
L3
A
30 31
H1 H2
X1 X2
+ –
TO MOTOR
FIELD
TERMINAL
BLOCK
TB2