Table 6: Communications bus and supply power terminal blocks, functions, ratings,
requirements, and cables
Terminal
block/Port
label
Terminal
labels
Function, electrical ratings/Requirements Recommended cable
type
+
-
FC Bus Communications
COM
Signal Reference (Common) for Bus
communications
FC BUS
SHLD
Isolated terminal (optional shield drain
connection)
0.6 mm (22 AWG)
stranded, 3-wire
twisted, shielded cable
recommended
FC BUS
(Port)
FC Bus
RJ-12 6-Position Modular Connector
provides:
FC Bus Communications
FC Bus Signal Reference and 15 VDC
Common
15 VDC, 180 mA, Power for Bluetooth
Commissioning Converter or FX-ZFR181x/FX-
ZFR182x Wireless Router
Bluetooth Commissioning
Converter retractable
cable or 24 AWG 3-pair CAT
3 Cable <30.5 m (100 ft)
+
-
SA Bus Communications
COM
SA Bus Signal Reference and 15 VDC
Common
SA BUS
SA PWR
15 VDC Supply Power for Devices on the SA
Bus
(Maximum total current draw for SA Bus is
240 mA.)
0.6 mm (22 AWG)
stranded, 4-wire (2
twisted-pairs), shielded
cable recommended.
Note:
The + and - wire
are one twisted pair,
and the COM and SA
PWR are the second
twisted pair of wires.
Sensor
Sensor
RJ-12 6-Position Modular Connector
provides:
SA Bus Communications
SA Bus Signal Reference and 15 VDC
Common
15 VDC Power for devices on the SA bus and
Wireless Commissioning Converter
24 AWG 3-pair CAT3 cable
<30.5 m (100 ft)
HOT
24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
24~
COM
24 VAC Power Supply Common
(Isolated
from all other Common terminals on
controller)
35 VA
0.8 mm to 1.0 mm
(18 AWG) 2-wire
25
FX-PCG26 General Purpose Programmable Controller Installation Instructions