ZETRON 640 DAPT XTRA, Installation And Repair Manual

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Installation
52 025-9416
Pin # Label Description
12 M-D M (mouth) lead for trunk D
26 TIP 1-A tip lead 1 for trunk A
27 TIP 2-A tip lead 2 for trunk A
28 E-A E (ear) lead for trunk A
29 TIP 1-B tip lead 1 for trunk B
30 TIP 2-B tip lead 2 for trunk B
31 E-B E (ear) lead for trunk B
32 TIP 1-C tip lead 1 for trunk C
33 TIP 2-C tip lead 2 for trunk C
34 E-C E (ear) lead for trunk C
35 TIP 1-D tip lead 1 for trunk D
36 TIP 2-D tip lead 2 for trunk D
37 E-D E (ear) lead for trunk D
Ground Reference and Lightning Protection
TELCO or PABX interfaces to the Model 640 should always include a ground reference connec-
tion. Ground start and E&M wink start applications cannot operate reliably without this ground
reference.
To ground the cabinet chassis to a common earth connection, use any of the screws holding the
rear panel in place and connect to the telephone demarcation block ground point, using 16 AWG
wire or larger. Tying two or three overhand knots in the wire inductively blocks lightning paths
from the telephone equipment, but may also block RF grounding.
CAUTION
The Model 640 does not provide any integrated lightning defense. Use additional equip-
ment, such as Zetron’s Deadbolt, to protect your investment.
Installation Interface Assembly
The optional installation interface assembly (Part No. 950-9334) provides all of the hardware
necessary for easy connection to the telco and the radio station equipment. The kit includes a
terminal block adapter board (Part No. 702-9470) that plugs directly into the RJ21 connector on
the rear of the Model 640. The adapter provides two male, 12-pin, Weidmuellers for connection
to the radio station (separate analog and digital) and four standard, 6-wire, phone jacks for telco
connections.
Terminal Block Adapter Installation
Follow the steps below to install the terminal block adapter on the rear panel of the Model 640.
q 1. Power-down the paging terminal.