When I am using a Valcom MultiPath or V-2924A s a master clock, what correction scheme do I use?  In both cases type 1 correction should be used.

Can I mix analog and digital clocks on the same cable pull?
Yes. As long as you observe the wiring guidelines provided in the wire gauge guide.

Can I use a single cable pull into a classroom for clocks, speakers and call switch?
Yes, assuming that you are using a Valcom intercom.

Can I use the Valcom clocks without a Valcom intercom?
Valcom clocks are compatible with many 3-wire synch corrected systems and may be used to add on to an existing clock system or may be used for new clock systems. In the case of new clock systems, we recommend using Valcom 2-wire digital correction. This correction scheme provides for a great degree of clock accuracy and for immediate clock correction following power failures and time changes. Our V-D110xx clocks, V-GPS GPS master clock and V-WMC Wireless Master Clock Transceiver all feature the capability to serve as master clocks and when used in conjunction with our V-VCU provide for a complete Valcom 2-wire digital head end. Refer to the product selection guides for equipment selection.

If I am using synch wired correction, what clocks should I choose?
For 110V clock systems, use the V-A11012, V-A11016, V-D11025A or V-D11040A. For 24VDC or 24vac clock systems, use the V-A2412, V-A2416, V-D11025A or V-D11040A.

If I am using Valcom 2-wire digital correction, what clocks should I choose?
Use the V-A2412, V-A2416, V-D2425, V-D2440, V-D11025A or V-D11040A.

What is the difference between the V-D110xx and V-D24xx digital clocks?
The V-D24xx clocks can only be used as slave clocks in a Valcom 2-wire digital system. The V-D110xx clocks can be used with Valcom 2-wire digital, 3-wire synch systems and can act as a master clock in a Valcom 2-wire system.

What 3-wire synch protocols are compatible with the Valcom Clocks?
Synch-wire 59TH minute correction protocol
Synch-wire 58th minute correction protocol
Synch-wire National Time and Rauland protocol

How do I set the clocks to recognize the synch-wire protocol that I am using?
The analog clocks automatically discover the correct protocol. The V-D110xx clocks have jumper settings. If you change the protocol in an existing system, the clocks may take up to 3 days to discover the new one.

What mounting provisions are necessary for the analog clocks?
The analog clocks, and digital clock surface mount enclosures are designed to mount to a single gang electrical box.

Do I have to reset the clocks following a power failure?
No, the clocks will automatically reset to the correct time. Depending upon the correction protocol that you are utilizing, this may take up to 24 hours. Valcom 2-wire protocol provides for immediate correction following a power failure.

What is the V-CDT Chronograph Timer Control Box?
The Chronograph Timer Control Box allows the V-D11040A to be used as a timer for sporting events, operating rooms, etc. The chronograph functions of the digital clock includes count up or count down modes in Hour:Minute (HH:MM) or Minute:Second (MM:SS) modes. Counter can be interrupted and resumed.   The V-CDT allows the clock to resume time of day display when the chronograph function is not in use.

I know that the V-D110xx clocks can be used as master clocks in a Valcom 2-wire digital system, what happens when there is a power failure?
The V-D110xx clocks feature an integral 10-year backup battery and continue to maintain current time during power failures.

How many Valcom power units are consumed by the clocks?
The 24V analog clocks require 1 Valcom power unit each, the 24V 2.5" digital clocks require 3 Valcom power units each and the 24V 4.0" digital clocks require 4 Valcom power units each. When using 3-wire synch correction, any Valcom 24VDC power supply may be used to power the clocks. When using Valcom 2-wire digital correction, the V-VCU must be used to power the clocks. The 110V clocks are not rated in power units.

Can I use multiple V-VCUs for systems requiring more than 120 Valcom power units?
Absolutely. The clock driver output of a V-VCU may be connected to the data input(s) of other V-VCUs in order to facilitate large distributed clock systems.

Can I connect the clocks using UTP wiring?
You can use UTP to connect the 24VDC clocks. Follow the wire length guidelines found on www.valcomclocks.com. When using 110V clocks, follow the guidelines of your local electrical code - do not wire 110V clocks with UTP type wiring.