Emerson 710NPBA INSTALLING A FIELD EXPANSION MODULE MOUNTING ASSEMBLY

User Instructions UM581127000
Spec. No. 581127000 (Model 710NPBA) Issue AB, March 22, 2012
Chapter 3. Maintenance Page 11
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INSTALLING A FIELD EXPANSION
MODULE MOUNTING ASSEMBLY
A field expansion module mounting assembly can be added to a system that has 24 or
fewer module mounting positions.
Procedure
Danger: Adhere to the “Important Safety Instructions” presented at the front of
this document.
Note: Refer to Figure 3-2 as this procedure is performed.
1) Slide the expansion module mounting assembly into position directly beneath the
bottom-most shelf of the module mounting assembly installed in the system (no
space between shelves). Secure the expansion module mounting assembly to
the relay rack with the provided 12-24 x 1/2" mounting screws and grounding
washers.
Note: Install the ground washers so the teeth make contact with the met al on
the mounting angles. Torque all screws to 65 in-lbs.
2) Remove the rear cover from the bottom-most shelf of the module mounting
assembly installed in the system and the expansion module mounting assembly.
Note: Apply electrical anti-oxidizing compound to busbar mating surfaces bef ore
performing the next step.
3) Secure the existing shelf’s busbars to the expansion shelf’s mating busbars with
the supplied interconnect busbars and hardware. Hardware build-up is: shelf’s
busbar, interconnect busbar, 1/4" hardened flat washer, 1/4" Belleville lock
washer, 1/4-20 nut. Install the Belleville lock washer so the concave side is
towards the busbar. Torque all connections to 60 in-lbs.
4) Install the supplied side brackets (both sides) to tie the existing shelf to the
expansion module mounting assembly.
5) If the Expansion Shelf Accepts DC-DC Converters: Refer to the Power
System Installation Instructions (IM581127000) and install the converter output
jumpers.
6) Remove the termination cable from the bottom controller bus interconnection
connector on the bottom-most existing shelf and plug it into the bottom controller
bus interconnection connector on the expansion shelf. See Figure 3-3.
7) Plug the controller bus connector on the cable exiting the top of the expansion
shelf into the mating connector exiting the bottom of the shelf above it. See
Figure 3-3.
8) Replace the rear covers removed in step 2) above.
9) Refer to the Power System Installation Instructions (IM581127000) and connect
AC input power to the expansion shelf.
10) Refer to the rectifier and converter User Instructions and install modules into the
expansion shelf as required.