Figure 7: Pin number assignments
Table 4: Pin number assignments
1
Power 15 VDC
2
Bus and power common
3
Power 15 VDC
4
Bus and power common
5
Sensor or zone bus -
6
Sensor or zone bus +
Supply power terminal block
The 24 VAC supply power terminal block is a gray, removable, 2-terminal plug that fits into a board-
mounted jack on the upper left of the ZEC controller. Wire the 24 VAC supply power wires from the
transformer to the
HOT
and
COM
terminals on the terminal plug as shown in the following figure.
Figure 8: Supply power terminal block wiring
Table 5: Supply power terminal block wiring
1
Supply power terminal block jack
2
Supply power terminal block plug
3
Wires from Johnson Controls 90 VAC to 24 VAC, Class 2, power transformer
Verasys ZEC510 VAV Controllers Installation Guide
12
