Clocks FAQs

In both cases type 1 correction should be used.

Yes. As long as you observe the wiring guidelines provided in the wire gauge guide.

Yes, assuming that you are using 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-GPSA GPS master clock and V-WMCA 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.

For 110V clock systems, use the V-A11012 or V-A11016. For 24VDC or 24VAC clock systems, use the V-A2412 or V-A2416.

Use the V-A2412, V-A2416, V-D2425B, or V-D2440B.

Synch-wire 59th minute correction protocol
Synch-wire 58th minute correction protocol
Synch-wire National Time and Rauland protocol

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.

The analog clocks, and digital clock surface mount enclosures are designed to mount to a single gang electrical box.

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.

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.

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.

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.

The Valcom clocks use Power over Ethernet (PoE), and are compliant with IEEE standard 802.3af. The power may be supplied by a LAN switch with PoE capability. If the LAN switch does not have PoE, a midspan power injector may be used.

The Valcom PoE clocks use Network Time Protocol (NTP) to receive time from any NTP server. The NTP server can be located on an internal (private) network or on the public Internet.

Each Valcom PoE clock will require one Ethernet connection for both data and power. Each PoE port will supply power to one device. Each clock requires about 5 – 7 Watts.

The Valcom clocks will contact the NTP server to synchronize time within about one minute of being powered on, then once per hour thereafter.

Each Valcom clock is supplied with the VIP-102B IP Solutions Setup Tool. This software tool provides an easy way to program all of the features of the clocks.

The Valcom PoE clocks can be programmed with a static IP address, or can use a DHCP (Dynamic Host Configuration Protocol) server.

Valcom analog and digital PoE clocks are surface mounted.