2-4 INSTALLATION MDS 05-2415A01, Rev. A
EXTERNAL CONNECTIONS
The following section describes how to connect external equipment to the transceiver in
typical installations. These recommendations may not be appropriate for all locations; local
electric wiring or fire codes may prescribe unique standards. The US National Electrical
Code is commonly the basis for local wiring guidelines and is recommended in the absence
of local standards.
DANGER
The MDS 4310-HL Data Transceiver is approved for use in
Class I, Groups ABCD, Division 2, Hazardous Locations.
The installer of these transceivers MUST be familiar with
hazardous location installation guidelines before any instal-
lation or maintenance is begun. Do not begin installation of
or make external connections to this device unless the area
is known to be non-hazardous.
Refer to Appendix H of this manual for further information
on the approved conditions under which the MDS 4310-HL
can be installed in hazardous locations.
ANTENNA Connector
The
ANTENNA Connector on the front panel of the MDS 4310 is the RF connector. See Figure
2-1. It is an industry standard female type “N” connector and mates with a standard type “N”
male connector, such as Amphenol 3900 (MIL Type UG-21) for RG-8 cable.
The exact mating connector type depends on the cable used. If large diameter rigid or semi-
rigid coaxial cable is used for the feedline (see Antenna and Feedlines section), use a short
length of RG-8 or RG-214/U cable between the transceiver and the feedline. A three foot
section of RG-214/U cable with connectors at both ends (P/N 19-1323A01) is available from
MDS. This flexible interface eliminates tight bends in the feedline and reduces bending,
mechanical stress on the feedline and connectors.
+13.8 DC (Primary Power) Connector
The radio can be powered from +13.8 Vdc power source connected through J2 on the
transceiver’s front panel. A custom power cable with an integral fuse and a molded mating
connector is provided with the radio. The lead with the integral fuse is the positive + line and
the lead with no fuse is the negative – line.
This power cable has an in-line fuse rating of three amperes (3A); do not use a substitute
cable without providing some type of external current limiting (fuse) protection for the radio.
INTERFACE Connector
On the left side of the front panel is the
INTERFACE connector, J1, consisting of a standard 25-
pin female “D” style connector. It mates with male connectors of the same series, such as the
ITT CANNON DB-25-P. These connectors are manufactured by many firms and are
available from distributors or from most retail electronics stores.
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