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Hi-Lite™ 30 LED contour tube specification & installation
v6 – June 2021
The installation
– Current Sense Circuit (CSC) operation
The Current Sense Circuit (CSC) is an integral part of the PSU. Its function is to
continuously monitor the installation and remove the low-voltage supply should
a fault be detected. Whilst it is primarily a safety feature, it can also assist in
troubleshooting.
The CSC has a status LED which indicates the current state of the circuit. On
the standard 240W supply there is an LED for each output channel. The CSC is a
sophisticated electronic device which takes a number of complex measurements
from the system in order to recognise fault conditions.
It is not necessary to understand the detailed functions of the operation algorithms
in order to successfully install or troubleshoot a Hi-Lite™ installation, however a
description of the CSC and its operation is set out below for information.
Operation
During normal operation the CSC continuously and automatically performs tests
on the DC supply to the Hi-Lite™ installation. Should a fault be detected the DC
output is switched off. Once this has occurred, a series of attempts to reinstate the
DC supply are made at intervals increasing from 1 second to 1 hour.
Should any re-try be successful, the DC output is switched on and the CSC enters
a back-off mode. Whilst in this back-off mode the re-try period that will be applied,
should a further fault be detected, is slowly reduced back to 1 second.
Should the fault still be present after the full retry cycle (around 5 hours), the CSC
enters an abort mode. Once in this mode, no further retries are made and the
status LED flashes red.
When a fault is detected, the status LED pulses a number of times rates to indicate
the type of fault. The table below lists these faults.
Pulse ratio Fault indicated
2 pulses
Start-up impedance test failure
3 pulses
Current monitor failure
4 pulses
Run-time impedance test failure
5 pulses
Reserved
6 pulses
Run-time voltage test failure
7 pulses
Start-up voltage test failure
8 pulses
Over-current
Visive Group Limited
Ash Road South, Wrexham Industrial Estate, Wrexham, LL13 9UG +44 (0) 1978 660181
www.visivegroup.com
