9–4 EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL
I/O MODULE INSTALLATION CHAPTER 9: EXTERNAL I/O MODULES
9.2 I/O Module Installation
See sections 3.3 and 5.6 for installation instructions for the external I/O Modules.
9.2.1 Power Source for I/O Modules
The EPM 9450/9650 can supply power to a limited number of I/O Modules and external
displays. For more modules, you must use an external power source, such as the GE PSIO
(12V). Refer to Section 5.6.2 to determine power needed.
Figure 9-2: PSIO Power Supply Side View, Showing Male RS485 Port
Figure 9-3: Power Flow from PSIO to I/O Module
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