Chapter 2 – Activation and Installation
Multi-Tech Systems, Inc. MultiModem CDMA Wireless Modem User Guide
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For optional direct-DC powering.
•
Connect the direct-DC power supply cable into the DC power source on the vehicle or machine in
which you are mounting the modem. Be sure the GND connection is correct.
•
Connect red wire to + (positive) and black wire to – (negative).
Note:
Units shipped with the universal AC power supply are not suited for installation in hazardous
locations.
Note:
For automotive application: according to the type of application, you can use permanent “+” or key-
switched “+”. Connect the power supply to its source (for example, in a mobile situation, to the
vehicle’s DC fuse/terminal block).
Warning
Over-voltage protection is provided on the device. To ensure complete protection, you
may want to add additional filtering to the DC input
Optional – Attach the Modem to a Flat
Surface
To mount the Wireless MultiModem, do the following:
1.
Obtain mounting screws (two are needed) that are appropriate for the surface on which you will mount the
modem. For example, one might use two 6-32 self-tapping screws 5/8” in length to mount the unit in a
truck to the wall of the cab behind the passenger’s seat.
2.
Typically, the unit is mounted against a flat surface into which holes can be drilled. The mounting holes
(center-to-center) must be separated by 125mm or 4 -15/16 inches.
Drill the mounting holes at the desired mounting location.
3.
Slide the mounting bridle into the corresponding slots on the backside of the modem chassis.
4.
Attach the modem with two screws to the mounting surface at the desired location on the equipment.
