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B. Unpacking.
After unpacking the Model 310, examine it for damage that may have occurred in transit. If the equipment has
been damaged, do not attempt to install or operate it, file a claim immediately with the carrier stating the extent of
the damage. Carefully check all envelopes, shipping labels and tags before removing or destroying them.
Before attempting to install the intercom, be sure that all parts listed in the KIT CONTENTS LIST have been
supplied.
C. Kit Contents List.
Qty.
1
4
4
1
1
D. Mounting.
The selection of the mounting location for the device, its controls and the routing of the wiring
is to be accomplished under the direction of the facilities and the safety engineer.
The intercom is intended to be mounted on any relatively flat and rigid surface by the two mounting ears on the
exterior of the housing. Figure 6 is a dimensional outline drawing showing the proper mounting configuration. The
two mounting ears have 13/32" diameter holes spaced 5‑5/8" apart. Hardware for mounting the intercom to the
surface is left up to the installer.
This unit is heavy and should be mounted on a rigid surface capable of supporting the weight of the intercom.
The intercom housing has two 1/2"‑14 IPS openings in the bottom. When installing the conduit to these openings
seal the threads with pipe compound or other sealing material.
For shipboard applications, installations shall be in accordance with the United States Coast Guard,
For units using the noise cancelling hand‑held microphone, install the supplied microphone mounting clip on any
rigid surface near the intercom. Avoid locating the microphone where it may be exposed to excessive moisture or
dust.
E. Electrical Connections.
All wiring to the intercom is terminated to the terminal block provided. The terminal block plugs into a header on
the PC board and is configured such that it can only plug in one way. Figure 7 shows the orientation of the wiring
block and describes the function of each position.
There are three jumpers shown on the PC board in Figure 7 which may need to be moved depending on the
desired operation of the intercom. J5 and J6 are for operating the intercom in either a balanced signal line
or unbalanced signal line configuration. These must be moved together as a pair. They are factory set in the
balanced line position. J7 is for configuring the intercom as either a Primary or Secondary device. The intercom is
factory set in the Primary position.
There is a switch on the board to configure the operation of the board from 120VAC to 240VAC. The switch is
factory set for the intercom to operate on 120VAC (see Figure 7).
See Figures 8 through 15 for typical intercom configurations.
Description
Wiring Block
Screws, Phillips Head
Lockwashers
Instruction Sheet
Resistor, 1K, 1W
Title 46 CRF, Parts 110‑113.
Do not connect wires when power is applied.
Part Number
140A326‑01
2561013
101216
6
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