Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements
Input and Output Wiring Guidelines
provides information and guidelines about the
functions, ratings, and requirements for the controller
input and output terminals; and references guidelines for
determining proper wire sizes and cable lengths.
In addition to the wiring guidelines in
, observe
these guidelines when wiring controller inputs and
outputs:
•
Run
all
low-voltage wiring and cables separate from
high-voltage wiring.
•
All input and output cables, regardless of wire size or
number of wires, should consist of stranded, insulated,
and twisted copper wires.
•
Shielded cable is not required for input or output
cables.
•
Shielded cable is recommended for input and output
cables that are exposed to high electromagnetic or
radio frequency noise.
•
Inputs/outputs with cables less than 30 m (100 ft)
typically do not require an offset in the software setup.
Cable runs over 30 m (100 ft) may require an offset
in the input/output software setup.
Table 3: FX-PCX47 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
Function, Ratings, Requirements
Terminal
Label
Terminal Block
Label
Same as (Universal)
INn
Note:
Use 3-wire cable for
devices that source power from
the +15V terminal.
15 VDC Power Source
for active (3-wire) input devices
connected to the Universal IN
n
terminals.
Provides 100 mA total current
+15 V
UNIVERSAL
(Inputs)
See Guideline
A
in
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pull-down
INn
See Guideline
B
in
Analog Input - Current Mode (4–20 mA)
Internal 100 ohm load impedance
Note:
A current loop fail-safe jumper can be positioned to
maintain a closed 4 to 20 mA current loop, even when the
power to the controller is interrupted or off. See
.
See Guideline
A
in
Analog Input - Resistive Mode (0–600k ohm)
Internal 12 V. 15k ohm pull up
Qualified Sensors: 0-2k ohm potentiometer, RTD (1k Nickel
[Johnson Controls
®
sensor], 1k Platinum, and A99B Silicon
Temperature Sensor) Negative Temperature Coefficient
(NTC) Sensor (10k Type L, 10k JCI Type II, 2.252k Type
II)
See Guideline
A
in
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V. 15k ohm pull up
Same as (Universal)
INn
Universal Input Common
for all Universal Input terminals
Note:
All Universal ICOM
n
terminals share a common,
which is isolated from all other commons.
ICOMn
11
FX-PCX47 Expansion Input/Output Module Installation Instructions
