NFS2-3030/E Installation Manual — P/N 52544:N1 07/18/2014
27
Attaching Option Boards
Installation
Option boards can be door-mounted behind a single-space blank plate (see Figure 3.9), and
mounted in any CAB-4 compatible chassis.
Mounting procedures
1.
Install four 1 inch (25.4 mm) stand-offs onto the chassis as shown in Figure 3.8.
2.
Place the first option board over the stand-offs so that holes line up.
3.
If no more option boards will be mounted in that position, securely fasten all stand-offs with
screws (provided with module). If mounting a second or third option board, attach another
layer of stand-offs and repeat steps 2-3. Note: Set the switches on an option board before
mounting another layer in front of it.
4.
If mounting a pair of SLC loop modules, refer to Section 3.8 “Connecting the Loop Control
and Expander Modules” and to Section 3.8.5 “Installing a Multi-layer Module into the
Chassis”.
5.
For the top (fourth) layer of option boards, slide the tab at the bottom of the board into the slots
on the chassis, and lay the board back onto the top of the chassis so that the studs line up with
mounting holes on the option board. Securely fasten all stand-offs with screws provided with
module.
6.
If mounting the option board behind a blank module plate in a dress plate or annunciator
backbox, see Figure 3.9 and the BMP-1 Product Installation Drawing. This dress plate is
suitable for option boards, which do not need to be visible or accessible when the door is
closed.
7.
If mounting a pair of loop control/expander modules, see Section 3.8 “Connecting the Loop
Control and Expander Modules”.
Single-space
blank plate
Fasten option board to the
plate with four screws
(included).
tm4
adp4
.cdr
Mount option board
onto stand-offs on the
blank plate
Mount single-space blank plate
onto compatible dress panel
Note: Mounting instructions for option boards are the same in various dress panels.
Figure 3.9 Door-Mounting Option Boards with a Single-space Blank Plate
NOTE:
Mounting two pairs of loop-control and -expander modules in one chassis position may
cause intermittent electrical interference. If this occurs, move one pair to a separate chassis
position.
