Siemens MXL-IQ Operation, Installation, And Maintenance Manual page 38

Installation
Figure 30
Installing the MOM-2 Card Guides
Figure 31
Installing the MOM-4 Card Guides
2-8
To mount the MOM-2/4 in an MSE-3L
enclosure:
1. Hold the MOM-2/4 so that terminal
blocks TB2 and TB4 are on the left.
2. Place the module vertically on the
mounting studs near the top left of the
enclosure as shown in Figure 23 on
page 2-3.
3. Fasten the MOM-2/4 in position with the
No. 10 flatwashers, lockwashers, and
nuts provided.
To install the card guides
(See Figures 30 and 31):
Install the card guides included in the
package using the #6 x 7/16 screws
provided. (The MOM-4 is shipped with the
mounting screws for the card guides
already installed.)
1. Mount the long screws.
2. Make sure that the locating pin on the
guide is seated in the hole on the
MOM-2/4.
3. Tighten the screw.
Repeat this process for the remaining card
guide(s). The MOM-2/4 is now ready to
accept the optional modules. If the system
does not require the installation of any half-
width modules, install the two #6 x 5/16
screws in the center holes where the
additional card guides would be placed.
Plug-in Cards for the MOM-2/4
Determine which optional plug-in modules
are used in your CSG-M configuration.
Next, decide where they should be installed
by checking the following factors:
1. The size of each module. The CSM-4
and CRM-4 each occupy two adjacent
slots.
2. How the field wiring will be installed.
3. The maximum load current permitted for
the MOM-2/4 is 6 amps for the MPS-6 or
12 amps for the MPS-12. This current
must be derated by the current drawn
from SMB TB5 (CZM-1B6 power and
NAC #1 and NAC #2). When the system
includes an external auxiliary power
supply, the maximum load current
permitted depends on the application.
Refer to Table 5 for the maximum
current required by each module under
full load conditions.
MOM-2/4 Electrical Installation
1. Attach the 8-conductor ribbon cable to
P6 on the SMB-2, engaging the locking
rib of the cable with the locking tab on P6.
2. Attach the other end of the 8-conductor
ribbon cable to P7 on the MOM-2/4,
engaging the locking rib of the cable with
the locking tab on P7.
3. Connect one end of the 2-wire 24 VDC
cable to P3 on the SMB-2, using the
locking tab to lock the cable onto P3.