EMC stands for Energy Management Computer, which can used to remotely monitor and control the APS C series ice melt controllers.
These connections are made to the Class 2 connection terminal block on pins 14 through 22. The following diagram will aid in making these connections.
APS C Series EMC Connections
The EMC can use the override on and override off to turn the systems on and off and provides internal dry contacts for monitoring and alarms. For a complete description of how the EMC works refer to the manual page 15.