Communications Bus and Supply Terminal Blocks, Functions,
Ratings, Requirements, and Cables Table
Table 14: Communications Bus and Supply Terminal Blocks, Functions, Ratings, Requirements, and Cables
Recommended Cable
Type
Function, Electrical Ratings/Requirements
Terminal Labels
Terminal
Block/Port
Label
0.6 mm (22 AWG) stranded,
3-wire twisted, shielded cable
recommended
FC Bus Communications
+
_
FC BUS
Signal Reference (Common) for bus communications
COM
Isolated terminal (optional shield drain connection)
SHLD
Wireless Commissioning
Converter retractable cable or
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
6-Position Modular Connector provides:
•
FC Bus Communications
•
FC Bus Signal References and 15 VDC Common
•
15 VDC Power for Wireless Commissioning
•
Converter or ZFR1811 Wireless Router
FC Bus
(port)
0.6 mm (22 AWG) stranded,
3-wire twisted, shielded cable
recommended
Note:
The + and - wires are
one twisted pair and
the COM and SA PWR
are the second twisted
pair of wires.
SA Bus Communications
+
_
SA BUS
SA Bus Signal Reference and 15 VDC Common
COM
15 VDC Supply Power for Devices on the SA Bus
(Maximum total current draw for SA Bus is 240 mA.)
SA PWR
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
6-Position Modular Connector provides:
•
SA Bus Communications
•
SA Bus Signal References and 15 VDC Common
•
15 VDC Power for devices on the SA Bus and
•
Wireless Commissioning Converter
SA BUS
(Port)
0.8 mm to 1.5 mm (20 to 16
AWG) 2-wire
24 VAC Power Supply - Hot
Supplies 20-30 VAC (Normal 24 VAC)
HOT
24~
24 VAC Power Supply Common
(Isolated from all other
Common terminals on controller)
COM
1
See
to determine wire size and cable lengths for cables other than the recommended cables.
2
The SA Bus and FC Bus wiring recommendations in this table are for MS/TP bus communications at 38.4k baud. For more
information, refer to the
MS/TP Communications Bus Technical Bulletin (LIT-12011034)
Setup and Adjustments
Data Protection Battery
The NIE is shipped with the data protection battery installed and connected. Do not disconnect the battery for any
reason other than to replace a defective battery.
The 24 VAC supply power to the NIE charges the data protection battery. At initial startup, the battery may require
a charging period of at least 4 hours before it supports data protection if power fails. Maximum protection (up to 3
consecutive power failures without recharging time) requires a 15-hour charging period.
The data protection battery slowly loses charge when 24 VAC power is removed from the NIE. If the battery completely
loses charge, the NIE real-time clock stops.
24
NIE29 Installation Instructions
