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LCA20/LCB20
Load Cell Amplifier with Relay & Data Output
OUTPUT
4-20mA, 0-10V
POWER SUPPLY
100/230VAC, 9-32VDC
RATING
IP65
The LCA20 is a highly flexible digital signal conditioning amplifier with relay and data output for single or multiple load cell applications.
The device is easy to set-up, either AC or DC powered and is IP65 NEMA 4 protected.
There are options of local or remote LCD displays, isolated 4-20mA or 0-10V analogue outputs, and relay outputs for control or alarm functions.
The newly designed LCA20 replaces the LCA15, providing increased functionality and much improved performance.

To view the full specification, please download the product datasheet.
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Typical Specification
Inputs
- The LCA20 accepts input from load cells/strain gauges and offers excitation voltage of 5V @160mA to drive up to 10x 350Ω bridges
- ± sense wires compensate for cable and safety barrier losses down to 3V excitation.
- Gain sensitivity is available in two ranges, 0.5-3.7mV/V and 3.7-7.8mV/V.
- Initial offset is no greater than ±0.15mV (15µV/V) which is cancelled during auto-calibration.
| PARAMETER | VALUE |
|---|---|
| Speed | Programmable 10 or 80 samples per second. |
| Factory mV/V Calibration Accuracy | ±0.05% FSD |
| Drift | ±2ppm/°C @ 2.5mV/V |
| Non-Linearity (Before Linearization) | 10-point |
| Internal Resolution | 20bit or 1 part in 1,000,000 |
| Noise Free Resolution @ 10Hz | 17.5bit or 1 part in 180,000 |
| Contact Inputs | Volt free and available for auto-tare, print and peak hold reset. |
Analogue Output
| PARAMETER | VALUE |
|---|---|
| Drive | 4-20mA up to 1KΩ - 0-10V up to 2mA |
| Accuracy | ±015% of range. |
| Resolution | Display up to 13 bits/4.5 digits. Settling time of 350mS to within 1% of step change. |
| Isolation | ±130V RMS or DC maximum to analogue input or any other port. |
Data Retention/Protection
| PARAMETER | VALUE |
|---|---|
| Retention | 20-years for set up values, minimum of 100,000 write cycles. |
| Protection | Watchdog timer giving repeat auto resets. Impending power detection and hold off. Calibration and Toolkit lock feature. |
Other Options & Accessories
| PARAMETER | VALUE |
|---|---|
| 2 Set Points | Output through 5A 240V AC SPCO relays with a latching option. |
| Communications Port (RS485) | Enabling up to 253 units to be multi dropped. |
| Communications Port (RS232) | For 1 to 1 connection and standard printer drive and large displays. |
| Printer Operation | By closure of volt-free contact or continuous ASCII stream. |
| Baud Rates | 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200. |
| Die Cast Case | Sealed to IP65/NEMA 4 with external dimensions of 220 x 120 x 80mm maximum. |
| Stainless Steel Case | Sealed to IP65/NEMA 4 with external dimensions of 224 x 160 x 90mm. |
| PCB Only (Eurocard) LCB20 | 100 x 160 x 57mm for rack or customer enclosure. |
Environmental
| PARAMETER | VALUE |
|---|---|
| Storage Temperature | -20 to + 70°C |
| Operating Temperature | -10 to +50°C |
| Relative Humidity | 95% maximum non-condensing. |
| CE Environmental Approval | European EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC |
Outline Dimensions (mm)
Ordering Codes
| CODE | DESCRIPTION |
|---|---|
| LCA20 | LCA20 base unit. |
| LC4 | RS485/232 communications |
| LR1 | Relay output module with 2 set points |
| LS1 | AC power supply. 100/120V or 220/230VAC. |
| LS3 | DC power supply. 9-32VDC. |
| LP1 | On board programmer. |
| LP2 | Remote handheld programmer. |
| LTL | Transparent plastic lid case. |
| JBA | Junction box active. |
| JPA | Junction box active – PCB only. |
| JPP | Junction box passive – PCB only. |
| LSS | Stainless steel case. |
| LDC | Die cast case. |
| PGM1 | Programming lead. |
Premium Quality
Rapid Turnaround
Dedicated Support Team
12 Month Warranty
