The Plug-In Output Board; Powering The Multiflex - Emerson MultiFlex Series Installation And Operation Manual

2.2. The Plug-In Output Board

Figure 2-3 - Exploded View -- MultiFlex Combination I/O Board
All MultiFlex boards except the MultiFlex
16 have output sub-boards that plug in to the top
of the base board. These boards are shipped with
the output board pre-installed on the board using
stand-offs, so no additional hardware setup
should be necessary.
Xformer P/N VA Rating
640-0041 50 VA
640-0042 50 VA
640-0056 56 VA
640-0050 75 VA
640-0045 75 VA
640-0080 80 VA
Table 2-1 - Transformers Compatible with MultiFlex Board
6 • MultiFlex I/O Board Operator's Guide
The additional board makes the MultiFlex
combination I/O boards considerably taller than
the MultiFlex 16 and all previous-generation
CPC I/O boards. If you will be mounting these
boards in an enclosure, the board will need at
least 2.5" of clearance between the base board
and the panel door.

2.3. Powering the MultiFlex

All models of MultiFlex require a 24VAC
Class 2 input power source. The MultiFlex 16
requires the power source to be center-tapped.
All other models do not use the center tap.
CPC supplies a wide variety of 24VAC trans-
formers with varying sizes and either with or
without center taps. Table 2-1 shows the trans-
former sizes and whether they are center-tapped
or non-center-tapped.
Primary Voltage
110 VAC
220 VAC
Multi-tap (120/208/240 VAC)
110 VAC
220 VAC
Multi-tap (120/208/240 VAC)
Center Tap?
No
No
Yes
No
No
Yes
026-1704 Rev 6 06-APR-10