4/04 IO-LC1, IO-LC3 I/O Expansion Modules
Unitronics Industrial Automation 9
Output current 0.3A maximum per output
Maximum frequency 20Hz (resistive load)
0.5Hz (inductive load)
ON voltage drop 0.5V maximum
Short circuit protection Yes
Response time 10mSec typical
Operating modes Both outputs can be independently configured, via the software, to operate in
one of the following modes:
Direct ladder control The output functions like a standard digital output, and is directly controlled
via ladder software. This is the default mode at power-up.
Setpoint The output is linked to one of the active Loadcell input values and operates
according to parameters set by the application software.
Status indicators
(OUT)
Red LEDs—Lit when the corresponding output is active.
Environmental
IP20/NEMA1
Operating temperature
0° to 50°C (32 to 122° F)
Storage temperature
-20° to 60°C (-4 to 140° F)
Relative Humidity (RH)
5% to 95% (non-condensing)
Mechanical
Dimensions (WxHxD)
80mm x 93mm x 60mm (3.15 x 3.66 x 2.362”)
Weight
170g (6oz)
Mounting
Either onto a 35mm DIN-rail or screw- mounted.
Notes:
1. The maximum current consumption does not provide for output requirements.
The additional current requirement of the outputs must be added.
2. The minimum settling times and settling time resolutions are: 12.5ms for one active channel, 675ms for two
active channels and 1,012.5ms for three active channels
3. The following connection-problems will cause the corresponding OUT OF RANGE LED to light up:
- Disconnection of one of the signal (±SG) lines
- Disconnection of one or both of the sense (±SN) lines
When the Out Of Range LED is lit, the Out Of Range bit of the corresponding Loadcell Status Message turns
ON, and the Loadcell's Net and Gross values will be set according as follows:
Normal Resolution High Resolution
Under-Range:
-2
15
= -32,768 = 8000 Hex -2
23
= -8,388,608 = FF80 0000 Hex
Over-Range:
2
15
- 1 = 32,767 = 7FFF Hex 2
23
- 1 = 8,388,607 = 007F FFFF Hex
4. When the external power-supply cannot be detected, the No Power Bit in all of the Loadcell Status
Messages turns ON.
5. The input's LED light up only when a communication link is established between module and OPLC.
6. AC excitation has the advantage of lower offset drift errors, improving performance over time and in the
presence of ambient temperature changes. To minimize the impact of offset drift errors in your loadcell
application, the use of AC excitation is recommended.
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