The power supply/amplifier(s) shall be Alpha Communications® / S.T.R.™ model VCU309, or approved equal. Amplifier shall operate from a 24VAC (40VA) U.L. Listed transformer (model# T2440). All wiring to power supply/amplifier shall be low-voltage Class II wiring, installed as per all federal, state, and local electrical codes. Power supply/amplifier shall surface mount right to the finished wall and shall be installed in a suitable environment that is free from excessive dirt, dust, temperature, humidity, grease and water. Power supply/amplifier shall provide the intercom amplification and signaling power for proper system operation. For most secure installation, power supply should be installed into a lockable equipment cabinet/housing.
Power supply/amplifier(s) shall be installed a safe distance from any source of electrical interference.
The Alpha Communications® / S.T.R.™ VCU309 amplifier/power supplies are used with the S.T.R.™ 'NoCoax' type video-intercom systems, to provide intercom amplification, power to operate the electric door opener(s) etc., and power to operate the video monitor units.
These VCU309 amplifier/power supplies are designed to easily surface mount right onto the finished wall by means of customer supplied screws or the convenient plastic 'Din Rail' bracket supplied with each power supply. Connections are positive screw terminal type.
The VCU309 is used for each 30 (or less) 'NoCoax' type video intercom monitor / handset stations on a system.
Height: 2.375" (60mm)
Width: 4.25" (108mm)
Depth: 4.75" (120mm) from mounting surface
|Volume Control:||Adjustable potentiometer built-in
|Connections:||Positive Screw Terminal Connectors.|
Basic video-intercom riser wiring shall be 4-common #22AWG and 1 selective wire #22AWG, for each video monitor station connected to the riser cable. Add one (or more) additional common and/or selective wires for any optional functions required, or for 'spare' wires. See system wiring manual for more complete wiring information.