SATEC EM132-133 Manual - Manual (Page 37)

‎Chapter 2 Installation
EM13x Series SMART MULTIFUNCTION METER 37
2.7 Communications Connections
Before installing the Communication Module, ensure that all
incoming power sources are shut OFF. Failure to observe this
practice can result in serious or even fatal injury and damage
to equipment.
Several communication options are available for the EM13X Series:
 COM1 (standard): RS-485
 COM2 (optional module):
Ethernet 10/100BaseT
PROFIBUS DP
RS-232 or RS-422/485
GPRS
RF
 COM3 (standard): IR
A full description of the communication protocols is found in the EM13X
Series protocol guides that come with your meter.