- Valcom 6 amp 2 wire clock driver- Includes a 6 amp current limited power supply and a Valcom digital protocolmixer- When combined with a VC-V-D11025 Digital Clock (or a V-GPS V-DCPI or V-WMC) the V-VCU can provide correction data and power to up to 120analog 36 2.5" digital or 30 4.0" digital clocks- Multiple V-VCUs may be combined in a single system- V-VCU interface to the V-GPS V-V-DCPI or V-WMC simply involves connecting the "data out" found on any one of these units to the"data in" ofthe V-VCU