Table 5: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal Block label
Terminal
label
Function, ratings, requirements
Determine wire size and
maximum cable length
OUT
n
Binary Output - 24 VAC Triac
(External Power Source)
Connects OUT
n
to OCOM
n
when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
Maximum 6 cycles/hour with M9220BGx-3
40 mA minimum load current
BINARY
(Output)
OCOM
n
Binary Output Common
(for OUT
n
terminal)
Note:
Each Binary Output Common terminal (OCOM
n
) is
isolated from
all
other commons, including other Binary
Output Common terminals.
See Guideline
C
in Table 6.
Cable and wire length guidelines
Table 6 defines cable length guidelines for the various wire sizes that may be used for wiring low-voltage
(<30 V) input and outputs. The required wire sizes and lengths for high-voltage (>30 V) Relay Outputs are
determined by the load connected to the relay, and local, national or regional electrical codes.
Table 6: Cable length guidelines
Guideline
Wire size/Gauge and type
Maximum cable length and
type
Assumptions
1.0 mm (18 AWG) stranded copper
457 m (1,500 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire
297 m (975 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire
183 m (600 ft) twisted wire
A
0.5mm (24 AWG) stranded copper
107 m (350 ft) twisted wire
107 m (350 ft) twisted wire
100 mV maximum voltage drop
Depending on the cable length
and the connected input or
output device, you may have
to define an offset in the setup
software for the input or output
point.
1.0 mm (18 AWG) stranded copper
229 m (750 ft) twisted wire
0.8 mm (20 AWG) stranded copper
297 m (975 ft) twisted wire
137 m (450 ft) twisted wire
0.6 mm (22 AWG) stranded copper
183 m (600 ft) twisted wire
91 m (300 ft) twisted wire
B
0.5 mm (24 AWG) stranded copper
107 m (350 ft) twisted wire
61 m (200 ft) twisted wire
100 mV maximum voltage drop
Depending on the cable length
and the connected input or
output device, you may have
to define an offset in the setup
software for the input or output
point.
C
See Figure 8 to select wire size/
gauge.
Use stranded copper wire.
See Figure 8 to determine cable
length.
Use twisted wire cable.
N/A
M4-CGM General Purpose Application Controllers Installation Guide
9
