Alarm Hang Time; Overload, Cable Short And Cable Break - BRUEL & KJAER VIBROCONTROL 1800 Series Instructions Manual

Brüel & Kjær Vibro │ Instruction VC-1800 Series
WARNING!
The system error relays are mechanical relays. Excessive current and/or voltage will damage
the relay. For this reason please do not apply any power source directly to the relay. Protect the
relay with a resistor in series that will limit the current.
The following conditions for the system error relay should not be exceeded in your application:
- Insulation
- Maximum current load
- Max. load voltage
Further specifications:
- ON resistance
- Off state leakage current max. 10 μA
6.16

Alarm Hang Time

The "Alarm Hang Time" is the time an Alert or Danger alarm remains activated even though the
vibration level has decreased to below the trigger level.
The system failure relay has no hang time, but will remain activated until the system failure
condition has ended.
6.17

Overload, Cable Short and Cable Break

The VC-18xx watchdog monitors each input channel where a sensor is connected to the device:
- Terminals #13 and #14 for sensor 1
- Terminals #15 and #16 for sensor 2
- Terminals #17 and #18 for sensor 3
- Terminals #19 and #20 for sensor 4
Overload, cable break and short circuit generate a system error (NOK status). The OK relay is
active. The OK LED shows NOK (lit red).
The DC analog output changes to 0 mA to indicate the system error.
© Brüel & Kjær Vibro ● C106834.002 / V06 ●
Technical alterations reserved!
Installation and Operation of VIBROCONTROL
100 V
100 mA
± 28 V
<12.9 Ω
UNRESTRICTED DOCUMENT
EN
18xx
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