Gai-tronics DEX-101 Hazardous Area Driller's Intercom Sta Manual de usuario descargar pdf (Pagina 9)

Pub. 42004-679L2G

ODEL DEX-10X AND DEX-20X DRILLER’S INTERCOM STATIONS Page 8 of 13

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07/13

Auxiliary Devices

Terminal block TB1 is provided for connection of the speaker, system cable, footswitch, and beacon.

This terminal block accepts a #12–22 AWG wire. Refer to Table 2 for the recommended conductor sizes.

Conductor ends can be stripped and terminated with or without a wire ferrule.

Table 2. Recommended Cable Sizes

Cable Use Size

System Digital: Two-conductor twisted pair, No. 22 AWG is typical

Analog: Four-conductor twisted pair (A/B twist; C/D twist), No. 22 AWG is

typical

Power Three-conductor, No. 12 AWG is typical

Beacon Two-conductor, No. 18 AWG is typical (for digital models only)

Footswitch Two-conductor, No. 22 AWG is typical

Speaker Cable Two-conductor twisted pair, No. 18 AWG is typical

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.

Table 3. Maximum System Cable Lengths

Digital Models Analog Models

Cable Capacitance No. 22 AWG No. 20 AWG No. 22 AWG No. 20 AWG

30.5 nf/1000 feet 6562 feet 6562 feet 4921 feet 6562 feet

13.7 nf/1000 feet 9843 feet 9843 feet

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.

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Gai-tronics DEX-101 Hazardous Area Driller's Intercom Sta Manual de usuario Pagina 9