Johnson Controls FEU2610 Series Installation Instructions Manual page 10

Table 1: Field Controller Platform Wiring List (Part 3 of 3)
Terminal Terminal
Block Labels
2,3 +
SA Bus
-
COM
SA PWR
FC Bus +
Terminal
-
3
Block
COM
SHLD
FC Bus Port FC Bus
24~ Power Hot
COM
1. See Table 2 for alternative wire gauges and lengths.
2. The SA Bus terminals and the RJ-style modular Sensor Port are connected internally.
3. The SA Bus and FC Bus specifications 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).
Table 2: Wire Gauge and Length Guidelines
Guideline Cable Size
A 1.0 mm (18 AWG)
0.8 mm (20 AWG)
0.6 mm (22 AWG)
0.5 mm (24 AWG)
B 1.0 mm (18 AWG)
0.8 mm (20 AWG)
0.6 mm (22 AWG)
0.5 mm (24 AWG)
C See Figure 9.
Function and Electrical Ratings/Requirements
Provides SA Bus communication network.
Provides reference for network communication bus and
15 VDC source power.
Sources 15 VDC power for devices on the SA Bus
Provides FC Bus communication network.
Provides an optional shield connection.
Not used with MS-FEU2610-0U.
RJ-12 6-position modular connector
AC Supply Input
Supply 20-30 VAC (Nominal 24 VAC)
The 24~ Power common; isolated from all other terminal
commons.
Maximum
Length
457.2 m (1,500 ft)
297.2 m (975 ft)
182.9 m (600 ft)
106.7 m (350 ft)
228.6 m (750 ft)
137.1 m (450 ft)
91.4 m (300 ft)
61 m (200 ft)
See Figure 9.
FEU2610 Field Equipment Controller Installation Instructions
Assumptions
100 mV maximum voltage drop
100 mV maximum voltage drop
N/A
10
Recommended Cable Type
1
and Length
0.6 mm (22 AWG) stranded, 4-wire
twisted, shielded cable
recommended
0.6 mm (22 AWG) stranded, 3-wire
twisted, shielded cable
recommended
BTCVT retractable cable or
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
0.8 mm to 1.0 mm
(20 to 18 AWG) 2-wire