Johnson Controls FX-PCX3731 - Cable and Wire Length Guidelines

Table 3: FX-PCX3731 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
1
Function, Ratings, RequirementsTerminal
Label
Terminal Block
Label
See Guideline A in Table 4
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width Internal 18 V, 3k ohm
pull up
IN n
BINARY INPUT
Binary Input - Pulse Counter/Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V, 3k ohm pull up
Binary Input Common for all Binary Input (IN) terminals
Note: All Binary ICOMn terminals share a common, which
is isolated from all other commons, except the
Configurable Output (CO) common (OCOMn) when
the CO is defined as an Analog Output.
ICOM n
See Guideline C in Table 4
Binary Output - 24 VAC Triac (External Power)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
OUTn
BINARY
OUPUT(External
Power Source Only)
Binary Output Common (for OUTn terminal)
Note: Each Binary Output common terminal (OCOMn) is
isolated from all other commons, including other
Binary Output commons.
OCOMn
See Guideline C in Table 4
Binary Output - 24 VAC Triac (Internal Power)
Sources internal 24 VAC power (24~ HOT)
OUTn
BINARY
OUPUT(Internal
Power Source Only)
Binary Output - 24 VAC Triac (Internal Power)
Connects OCOMn to 24~ COM when activated.
Internal Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
OCOMn
1
See Table 4 to determine wire size and cable lengths for cables.
Cable and Wire Length
Guidelines
Table 4 defines cable length guidelines for the various
wire sizes that may be used for wiring low-voltage (<30V)
input and outputs.
8FX-PCX3731 Input/Output Module Installation Instructions