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6.18
Over Range
The VIBROCONTROL 18xx vibration detects when the measured value exceed the set measuring
range.
The detection of an over range will not generate a system error.
The DC analog output will change to 20.5 mA.
The status of the alarm relays will not change.
6.19
Configuration of Analog Outputs
The VC-18xx has four independent analog outputs on terminals #9, #10, #11 and
#12 that can be configured either as a relay output or as an analog DC output. When configured as
a DC output, it is proportional to the vibration measurand. The selection of the four analog outputs
is described in section 6.4.
6.19.1 Relays
The VC-18xx vibration monitor has four alarm relays that can be attached to any of the Alert and
Danger alarms. Relays must be enabled in the menu in order to become activated, if triggered.
One alarm relay can serve more than one alarm thus making it not always possible to determine
immediately exactly which vibration measuring function caused an alarm relay to become
activated.
The "contacts" of all alarm relays are closed (= make) while in standby and open (= break) when
activated. Therefore the alarm relays also appear to be activated whenever the main power of the
VC-18xx vibration monitor fails.
The four VC-18xx status alarm relays are named respectively: "Output 1 Relay" (terminal #12),
"Output 2 Relay" (terminal #11), "Output 3 Relay" terminal #10) and "Output 4 Relay" (terminal #9).
Page 44 of 110
© Brüel & Kjær Vibro ● C106834.002 / V06
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