Verasys® 32 Point 24 VAC Application Controller Installation Instructions
24
•
Refer to the Verasys® BACnet® MS/TP Communications Bus Technical Bulletin
(LIT-12012362)
for detailed
information regarding wire size and cable length requirements for the Sensor and System buses.
Table 7: Communication Bus and Supply Power terminal Blocks, Functions, Ratings, Requirements, and
Cables
Terminal
Block/Port
Label
Terminal Labels
Function, Electrical Ratings/
Requirements
Cable Type
System Bus
(Upper)
+
System Bus Communications
0.6 mm
2
(22 AWG) stranded, 3-wire twisted,
shielded cable is best practice.
-
COM
Signal Reference (Common) for Bus
communications
SHD
Isolated terminal (optional shield
drain connection)
Sensor BUS
(Port)
Sensor BUS
RJ-12 6-Position Modular Connector
provides: Sensor Bus
Communications
Sensor Bus Signal Reference and 15
VDC Common
15 VDC, 71.5 ohms at 4 W
N/A (24 AWG) 3-pair CAT3 cable <30.5 m (100
ft)
Sensor Bus
Terminal
(Lower)
+
Sensor Bus Communications
0.6 mm
2
(22 AWG) stranded, 4-wire (2 twisted-
pairs), shielded cable is best practice.
Note:
The + and
-
wire are one twisted pair,
and the COM and Sensor PWR are the second
twisted pair of wires.
-
COM
Sensor Bus Signal Reference and 15
VDC Common
PWR
15 VDC Supply Power for Devices on
the Sensor bus. Maximum total
current draw for Sensor bus is 240
mA.
24~ INPUT
HOT
24 VAC Power Supply
–
Hot
Supplies 20–30 VAC Nominal 24 VAC
0.8 mm
2
to 1.5 mm
2
(32 AWG) 2-wire
COM
24 VAC Power Supply Common
Isolated from all other Common
terminals on controller
20 VA at 24 VAC nominal
MODBUS
+
Modbus communications
0.6 mm
2
(22 AWG) stranded, 4-wire
(2 twisted pairs), shielded cable is best
practice.
-
COM
Signal Reference (Common) for bus
communications
24~ OUT
24~
24 VAC Utility Supply
(for actuators)
- 80 mA continuous
0.8 mm
2
to 1.5 mm
2
(18 AWG) 2-wire
COM
24 VAC Power Supply Common
