Engineering Documentation

Appendix A – Discontinued Products
Modular Equipment Controller (MEC) and Point Expansion Module (PXM)
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Point Type Specifics Diagram
Analog Output 4-20 mA Figure 77
0-10 Vdc Figure 78
Digital Input Dry contacts Figure 79
Pulse accumulating Figure 80
Digital Output Pulsed or latched Figure 81
Universal Input Figure 82
WARNING
All transformer or isolated power supply secondary neutrals requiring connection to
earth ground must be directly connected to an approved building earth ground
terminal located at the point termination module where the signal is terminated.
This is represented in the following diagrams by “E” at the earth ground symbol.
Analog Input
Fig. 105: Connecting a 2-Wire Analog Input (4 to 20 mA).
Fig. 106: Connecting an Externally Powered Analog Input (4 to 20 mA).