Johnson Controls M4-CV Series User Manual

Table 7: Communication bus and supply power terminal blocks, functions, ratings, requirements, and cables
Terminal block/Port label Terminal labels Function, electrical ratings/
Requirements
Recommended cable type
+
-
SA Bus Communications
COM SA Bus Signal Reference and 15 VDC
Common
SA BUS
1
POWER 15 VDC Supply Power for Devices on the
SA Bus
0.6 mm (22 AWG) stranded, 4-wire
(2 twisted-pairs), shielded cable
recommended
Note: The + and - wires are one
twisted pair, and the COM and
POWER wires are the second
twisted pair.
SA BUS (Port)
1
SA BUS (CVM)
Sensor (CVE)
RJ-12 6-Position Modular Port provides
SA Bus Communications.
SA Bus provides 15 VDC Power for the
following:
• NS Series Sensors
• MAP Gateway 4.2 or above
• Wireless ZigBee WRZ-78xx Series
One-to-One Wireless Receiver
• DIS1710 Local Controller Display
• VAV Balancing Tool
24 AWG 3-pair CAT 3 Cable <30.5m
(100 ft)
HOT 24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24VAC)
24V~
COM 24 VAC Power Supply Common
The CVM models only isolate this
terminal from the FC Bus common.
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire
1 The FC Bus and SA Bus wiring recommendations in this table are for MS/TP Bus communications at 38.4k baud.
Termination diagrams
A set of Johnson Controls termination diagrams provides details for wiring inputs and outputs to the controllers. See the
figures in this section for the applicable termination diagrams.
Table 8: Termination details
Type of Field Device Type of Input/
Output
Termination diagrams
Voltage Input -
External Source
UI
Voltage Input -
Internal Source
UI
M4-CV Series VAV Box Controllers Installation Guide 11

Johnson Controls M4-CV Series Specifications

General

Brand	Johnson Controls
Model	M4-CV Series
Category	Controller
Language	English