GAI-Tronics DEX-203 Посібник - Сторінка 9

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M
DEX-103
DEX-203 D
ODEL
AND

Auxiliary Devices

Terminal block TB1 is provided for connection of the speaker, system cable, footswitch, and beacon.
This terminal block accepts a 4.0-0.5 mm
Conductor ends can be stripped and terminated with or without a wire ferrule.
Cable Use
Size
System
2-conductor twisted pair, 0.75 mm
Power
3-conductor, 4.0 mm
Beacon
2-conductor, 1.0 mm
Footswitch
2-conductor, 0.75 mm
Speaker cable
2-conductor twisted pair, 1.0 mm
1. Install the system cable on TB1 system terminals A–D. Each system cable must be home run to the
Central. Digital stations require termination of a 2-conductor twisted pair cable on system terminals
A and B only. Analog stations require termination of a 4-conductor twisted pair cable (A/B twist &
C/D twist) on system terminals A–D. Refer to Table 3 for the maximum system cable lengths.
2. Install the speaker cable on TB1 Speaker terminals LS1 and LS2. Refer to Table 2 for recommended
conductor sizes.
3. Install the beacon control cable on TB1 terminals C1 and C2. This control output is available on
digital stations only. Refer to Table 2 for recommended conductor sizes.
4. Install the footswitch cable on TB1 terminals N.O. and C. Refer to Table 2 for recommended
conductor sizes.
After all connections are made, inspect and clean the machined and threaded surfaces of both the
termination cover and box. Clean the surfaces by wiping with a clean, lint-free cloth. Apply a light coat
of Killark LUBG lubricant to the cover threads. Install and hand-tighten the cover to the box.
f:\standard ioms - current release\42004 instr. manuals\42004-692l2c.doc
11/10
'
I
RILLER
S
NTERCOM
2
wire. Refer to Table 2 for the recommended conductor sizes.
Table 2. Recommended Cable Sizes
2
is typical
2
is typical
2
is typical
Table 3. Maximum System Cable Lengths
Cable Capacitance
10 nf/100 meters
4.5 nf/100 meters
S
TATIONS
2
is typical
2
is typical
0.75 mm
2
Wire
2000 meters
3000 meters
Pub.: 42004-692L2C
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