Viconics VTR7300 Application Manual - Manual (Page 17)

17
Wiring of Pulsed Electric Reheat Applications Components of VC340xX Relay Pack
All VC3xxxX Relay Pack(s) are for use as operating controls only and are not safety devices. These instruments
have undergone rigorous tests and verifications prior to shipment to ensure proper and reliable operation in the
field. Whenever a control failure could lead to personal injury and/or loss of property, it becomes the responsibility
of the user / installer / electrical panel designer to incorporate safety devices ( such as relays, flow switch, thermal
protections, etc… ) and/or alarm system to protect the entire system against such catastrophic failures. Tampering
of the devices or miss application of the device will void warranty.
Provide overload protection and disconnect as required.
Status LED VC3xxxX Relay Packs are equipped with a single green status LED beside the low voltage screw terminals.
Green LED off: Line power to the VC3xxxX Relay Pack is off
Green LED 2 short pulse fast blinking:
• Line power to the VC3xxxX Relay Pack is on
• No active communication has been received from a VTR73xxA Terminal Equipment Controller in the past 10 seconds.
• The VC3xxxX Relay Pack is in stand-by mode with all outputs reset to their default “off demand” contact opened state.
Green LED 2 short pulse fast blinking & 1 long pulse:
• Line power to the VC3xxxX Relay Pack is on
• Communication active and has been received from a VTR73xxA Terminal Equipment Controller.
• The VC3xxxX Relay Pack is in operational mode.