Communication Technology TVC-25 volume control

Tri-wire TVC-25 25W volume control in white

Communication Technology 25W Tri-wire override volume control on UK single gang in white. Use with TW1010 (sold separately). May also be used without TW1010 in applications when a 'non-override' volume control is required.

TVC-25 and TW1010 volume controls

TW1010 is an interface between the amplifier and loudspeaker/s to allow low cost overall paging override, volume restoration,where a number of individual loudspeaker line volume controls are to be installed.

Without TRIWIRE, each volume control would need to be fitted with an override relay requiring centrally sourced powering, involving 4 wire cabling. As the name suggests, the TRIWIRE system uses only three wires linked to the volume controls, enabling a lower cost of installation.

A special TRIWIRE line volume control, TVC25, is recommended for use with this system, though any of the CommunicationTechnology range is compatible.

TW1010 has the advantage of being low profile and suitable for all back boxes of at least 20mm depth, supplied standard with an Ivory White plastic front panel. For installation in close proximity to the host amplifier.

Features

No remote relay powering necessary
• Lower cost of each volume control
• Compatibility with all types of paging access systems, including VOX gates, passive or electronic access
• Requires only a few milliamps, can be powered from a 24V plug top supply, or the host amplifier
• TW1010 can easily be installed in a UK double switchplate back box or within the host amplifier
• May also be used to terminate all amplifier, microphone and loudspeaker cabling
• Auxiliary outputs for speech (paging) only, music only in addition to normal outputs are provided

Tri-wire system series

TW1010 Triwire override interface complete with UK switchplate
TVC25 25W Triwire override volume control (May also be used without TW1010 in applications when a 'non-override' volume control is required

Specification TVC-25

Rated Input 25W
Maximum Load 30W
Maximum Input Voltage 100V RMS 140V Peak
Control Attenuation 60dB in 12 steps, including off
Operating in Systems Attenuation recommended below 150Hz
Terminations Screw terminals; maximum cable size 3.5mm²
Dimensions PC, 65(L) x 50 (D)mm. Overall depth 30mm. When mounted to supplied UK Single
Switchplate depth behind panel is 20mm

Specification TW1010

Supply Voltage 18-35 V negative ground, 24V nominal
Supply Current 20mA on override
System Function By direct 'PRESS TO TALK' connection on paging microphone or by
grounded 24V access system
Volume Restoration Relay Contacts: Silver nickel 2 Amp. Maximum switching voltage 150V AC
Maximum Input Power 120W RMS, 50, 70 or 100V line
Dimensions (face plate) 145(W) x 85(H) x 15(D) mm (2 gang EO plate)
requires at least 25mm depth back box/enclosure

Specific accessories	Price ex. VAT
Communication Technology TW1010 volume control	£51

Page last updated:  Tuesday 13 May 2008

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