SATEC EM920 Installation Manual - Manual (Page 18)

Chapter 12
Input / Output ports options
Before I/O Module installation 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.
On board I/O ports
LOGIC/DISPLAY
The EM920 LOGIC/DISPLAY board is equipped with two fast Dry contact detector – Digital
Inputs 2DI unit, providing wet contact voltage of 24VDC, RS-485 communication port
COM3 and USB device port.
Figure 13:LOGIC/DISPLAY Cable
2DI
Two On Board optically isolated digital inputs are provided for status monitoring and
external synchronization of power demand period and time. Dry contacts may be connected
to these inputs, as shown in Figures 12
For ratings, see Appendix: Technical Specifications.
Figure 14: 2DI LOGIC/DISP LAY STATUS Input Connection
KYZ relay
The meter includes one Form C relayl output. It can be used to send KYZ pulsing
information to third party system equipment, accessible from meter base blades
contacts.
For ratings, see Appendix: Technical Specifications