Table of Contents
Advertisement
Table 2: IOM37 terminal blocks, functions, ratings, requirements, and cables
Terminal
Terminal block label
label
OUTn
Universal
(Outputs)
OCOMn
Cable and wire length guidelines
The table below defines cable length guidelines for the
various wire sizes that may be used for wiring low-voltage
(<30 V) input and outputs.
Table 3: Cable length guidelines for recommended wire sizes for low-voltage (<30 V) Inputs and Outputs
Guideline
Wire size/Gauge and type
1.0 mm (18 AWG) stranded copper
0.8 mm (20 AWG) stranded copper
A
0.6 mm (22 AWG) stranded copper
0.5 mm (24 AWG) stranded copper
1.0 mm (18 AWG) stranded copper
0.8 mm (20 AWG) stranded copper
B
0.6 mm (22 AWG) stranded copper
0.5 mm (24 AWG) stranded copper
See Figure 8 to select wire size/gauge.
C
Use stranded copper wire
8
IOM3711 Input/Output Module Installation Guide
Function, ratings, requirements
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
Requires an external load of 1,000 ohm or more.
Note: The AO operates in Voltage Mode when
connected to devices with impedances greater than
1,000 ohm. Devices that drop below 1,000 ohm may not
operate as intended for Voltage Mode applications.
Analog Output - Current Mode (4–20 mA)
Requires an external load between 0–300 ohm.
Note: The AO operates in Current Mode when
connected to devices with impedances less than 300
ohm. Devices that exceed 300 ohm may not operate as
intended for Current Mode applications.
Binary Output Mode - 24 VAC/DC Field-effect Transistor
(FET)
Connects OUT to OCOM when activated.
30 V AC/DC maximum output voltage
0.5 A maximum output current
40 mA minimum load current (hold current)
Universal Output (UO) Common
Isolated from all other terminal commons, including other UO
commons.
Maximum cable length
and type
457 m (1,500 ft) twisted wire
297 m (975 ft) twisted wire
183 m (600 ft) twisted wire
107 m (350 ft) twisted wire
229 m (750 ft) twisted wire
137 m (450 ft) twisted wire
91 m (300 ft) twisted wire
61 m (200 ft) twisted wire
See Figure 8 to determine
cable length. Use twisted
wire cable.
Determine wire size and
maximum cable length
See Guideline A in Table 3.
See Guideline B in Table 3.
See Guideline B in Table 3.
Same as OUT
Assumptions
100 mV maximum voltage drop
Depending on cable and the connected input
or output device, you may have to define an
offset in the setup software for the input or
output point.
100 mV maximum voltage drop
Depending on cable and the connected input
or output device, you may have to define an
offset in the setup software for the input or
output point.
N/A
Advertisement
Table of Contents
