Auxiliary power supply, Low dc auxiliary power supply, Figure 21: auxiliary dc power supply connection – SATEC EM720 Installation Manual User Manual
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Chapter 2 Installation
Auxiliary Power Supply
Low DC Auxiliary Power Supply
The
EM720
can be equipped with additional power supply to redundant the built-in power supply
(Auxiliary Power Supply –
APS
), without need of Battery backup Power Supply (
BPS
).
The DC
APS
can be plugged-in any
EM720
module slots.
The
APS
module is connected to an external DC Voltage source with a three-pin width pluggable
terminal block, as shown in figure 20, see
for DC Voltage Inputs requirements
The DC
APS
module provide two indication GREEN LEDS:
"VIN" GREEN LED: is "ON" continuously when DC voltage is applied to the terminals
is "OFF" if Measurement AC Voltages inputs are applied to the
EM720
"VOUT" GREEN LED:
is "ON" if Measurement AC Voltages inputs are missing
Figure 21: Auxiliary DC Power Supply Connection