Varec Data Entry Terminal 8620 Installation and..., Installation And Operation Manual

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Maintenance and Troubleshooting
24 Installation and Operations Manual
5.2.5 8620 DET Voltage Monitor
The voltage monitor monitors the input voltage and detects whether the voltage is low or below
an acceptable level (for DC units only). The voltage monitor LED indicates the different states of
the input voltage (see Table 5-5 below).
For AC units, the LED indicates that power is supplied to the unit.
Figures 5-3 shows the location of the 8620 DET voltage monitor LED.
Figure 5-3: 8620 DET Voltage Monitor LED and Reset Button Locations
Table 5-5 lists the input voltage and the state of the LED for monitoring the voltage.
Note The LED remains Red once the supplied power to the 8620 DET becomes
unacceptable. Contact your Varec representative for more information when the LED is RED.
5.2.6 Resetting the 8620 DET
Note The reset button resets the CPU of 8620 DET, but does not reset the voltage monitor.
To reset the 8620 DET, toggle the reset button shown in Figures 5-3 above.
Input Voltage LED
Above 23 VDC Solid Green
Approximately 23 VDC - 19 VDC Flashes Green
Below 19 VDC
Red (The LED remains Red even if good power is restored).
Contact Varec for more information.
Table 5-5: Input Voltage and LED State
8620 Voltage
Monitor LED
8620 DET
Reset Button