Viconics VWG-50 (Classic ZigBee) Installation Guide - Manual (Page 15)

15 | VWG-50-Installation Manual
2) Apply Power
Apply power to the VWG by plugging in the power plug into either the VWG (if wall
mount AC adapter VWG-PS-AC) or the 24VAC-powered VWG-PS-DC module.
3) Check the Status LEDs
When power is applied, the green LED labeled “SYS” will light. This is a green LED. Once
the VWG boots, the yellow “BEAT” (heartbeat) LED will begin blinking, with a typical rate
of about 1 Hz. Boot time should begin within 30 seconds after power is applied.
The blink pattern of the heartbeat LED under normal operation will differ for each
installation (depending on station activity). But, in general, the LED should blink about once
per second. The rate will be slower when the control engine is executing the station
database, and as more objects / wireless controllers are added.
After applying power, if the heartbeat LED comes on (steady) and stays lit longer than
two minutes, contact technical support for assistance. See also the “Using Status LEDs”
section.
A
BOUT THE
B
ATTERY
The VWG is provided with a custom 10-cell NiMH battery pack mounted to the unit (under
the cover). This battery allows the VWG to continue operation through very short power
bumps (a few seconds in duration). If a longer power outage occurs, the battery provides
enough run time for the VWG to backup data and then shutdown. Typically, this is one
minute. Shutdown occurs automatically, after data is backed up to on-board flash
memory.
The battery is trickle-charged by the VWG during normal operation. Following an extended
power outage, the battery is charged at a faster rate. The power and battery circuitry is
monitored by the VWG. The battery should be replaced approximately every three years, or
more often if the unit is in a high temperature environment.
Note: A NiMH battery characteristic is to lose charge if not left in charge mode (trickle
charge). Leaving the battery unconnected, or in the unit powered off will cause
the battery to fully discharge in a matter of weeks. Note that in the case of a new
VWG, it ships from the factory with a completely discharged battery. Therefore,
allow at least 18 hours for the battery to charge if it has not been in a powered unit.
For more information on the use and replacement of the battery, refer to the “Required
Battery Maintenance” section.