© Brüel & Kjaer Vibro ● S1079330.002 / V04 ● █ Page 163 of 188
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VC-8000 MPS
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23.11 Bypass a Signal (or Relay) Channel
If a transducer is faulty and causing nuisance alarms, you can easily bypass the signal channel (or
the relay channel) as a temporary solution until the sensor is replaced.
When you bypass a signal channel, the Modbus signal will be set to the signal clamp value; typically,
this value is zero (see section 16.1.9). The analog output (4-20 mA) signal will also be set to the
clamp value or to the 2mA clamp (if enabled).
Do not use the Signal/Relay Bypass function when reconfiguring a rack.
Servicing a rack includes: power cycle, cards removed, configuration changes, firmware
upgrades etc. The rack should be externally bypassed when being serviced
(See section 6.9 Avoid False Trips).
Only use Signal/Relay Bypass to temporarily disable nuisance alarms.
23.11.1 Bypass Signal Channel
Signal Bypass disables the signal channel, regardless of any alarm conditions in the rack. Use the
VC-8000 Maintenance software to bypass signal channels; the Maintenance display on the touch
screen panel cannot bypass signal channels.
Follow these steps to bypass a signal channel.
Action Screen Capture
Select the signal channel.
Confirm that you are viewing the correct signal
channel (Slot 3 Channel 3 (Brg 2X))
Select Enable Bypass
Enter password (if required).