SATEC EM920 Installation Manual - Manual (Page 27)

Chapter 2 Installation 21
Auxiliary Power Supply
AC/DC Auxiliary Power Supply
The EM920 can be equipped with additional power supply to redundant the built-in power
supply (Auxiliary Power Supply – APS).
To install the APS module follow instructions:
1) Remove the plastic cover
2) Remove the body shield
3) Plug-in the module in the APS slot and attach it to bracket using the two
screws
4) Connect the APS pigtail cable and pass it through the device base window
cables
5) Mount back the body shield
6) Mount back the plastic cover
The APS module is factory or Meter Shop plugged-in at the APS slot
The APS module is connected to an external AC/DC Voltage source with a three-wire pigtail
cable as shown in figure 25, see Appendix: Technical Specifications
Figure 27: AC/DC APS module
The AC/DC APS module provide one indication GREEN LED:
is "OFF" if AC/DC APS cable is disconnected or
no power source is applied to it
"PWR" GREEN
LED:
is "ON" if power is applied to AC/DC APS cable