Gai-tronics DHF-102 Digital Intercom Staitons Instrukcja Użytkownika Pobierz pdf (Strona 13)

Pub.: 42004-383D

ODEL DHS/DHF SERIES DIGITAL INTERCOM STATIONS Page 11 of 24

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System

This station requires a two-conductor twisted pair cable run between the station and the central cabinet.

Cable capacitance is critical to the station performance on long distances. Refer to Table 1 for the

maximum system cable lengths and Table 2 for the recommended cable sizes. Terminate the system

cable on terminal block P44 pins 5 and 6 (Data A and B).

Table 1.

Maximum System Cable Lengths

Cable Capacitance 22 AWG (0.325 mm

) 20 AWG (0.519 mm

)

30.5 nf/1000 feet (304.8 m) 6562 feet (2000 m) 6562 feet (2000 m)

13.7 nf/1000 feet (304.8 m) 6562 feet (2000 m)/

9843 feet (3000 m) with local 24 V power

9843 feet (3000 m)

Table 2.

Recommended Cable Sizes

Cable Use Size

System Two-conductor twisted pair, No. 22 AWG (0.325 mm

) is typical

Power Three-conductor, No. 18 AWG (0.823 mm

) is typical

Footswitch, inputs, audio line Two-conductor, No. 22 AWG (0.325 mm

) is typical

Output contacts Two-conductor twisted pair, No. 18 AWG (0.823 mm

) is typical

Speaker cable Two-conductor twisted pair, No. 18 AWG (0.823 mm

) is typical

Audio

External Speaker

If this station is located in a high noise area, an external speaker or horn can be used to broadcast audio

received by this station. Terminate the external speaker or horn on terminal block TB14.

Audio Output to Remote Amps

Audio received by this station can be transmitted to remote amplifier stations for broadcast into high noise

areas. Terminal block TB1 has been provided to connect audio to the remote amplifiers.

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Gai-tronics DHF-102 Digital Intercom Staitons Instrukcja Użytkownika Strona 13