Electrical Installation
There are two inputs that connect the
MOM-4 with the MMB-1/-2 and PSR-1.
These inputs provide all the necessary
power and data lines to support the
optional modules.
The first input is an 8-conductor ribbon
cable. Attach the cable to P6 on the
MMB-1/-2 or P6 on the PSR-1, making
sure that the locking rib on the cable
connector engages the locking tab on
P6. Attach the other end of the cable
to P7/P10 on the MOM-4, again making
sure that the locking rib on the cable
engages the locking tab on P7/P10.
This cable supplies 5 VDC and commu-
nication between the MMB-1/-2, PSR-1
and the modules installed in the MOM-4.
The second input feeds 24 VDC full
wave unfiltered DC to the MOM-4. This
input is connected to either P5/P8
(MMB-1 only) or TB6/TB7. A 2-wire
cable is provided for backward compat-
ibility with the MMB-1. Connect one
end of the cable to P3 on the MMB-1,
making sure the cable rib and board tab
lock. Attach the other end of the cable
to P5/P8 on the MOM-4 in the same
way. The MMB-1 limits this power input
to 2 amps. Under maximum load condi-
tions the optional modules must never
draw more than 2 amps from this
connection.
MOM-4 Connections and Ratings
4 - 53
When the 24 VDC is provided by either
the MMB-2 or the PSR-1 use TB6/TB7
on the MOM-4 to connect the power.
The wire for this connection is not
supplied (See MMB-2 Installation
Instructions, P/N 315-095097 or PSR-1
Installation Instructions, P/N 315-
090911 for terminal connections). Use
the following chart to determine the
available 24 VDC current.
MAXIMUM MODULE LOAD CURRENTS
Source Max. Current
MMB-2 with MPS-6/6W 6 *
MMB-2 with MPS-12/12W 12 *
PSR-1 with MPS-6/6W 6 **
PSR-1 with MPS-12/12W 12 **
* Derate by the total of CZM-1B6 power, NAC-1 and NAC-2
** Derate by the total of CZM-1B6 power
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