MPA Series
MPA-8A8R
MPA-8A8R Industrial PLC Controller
MPA-8A8R is an industrial PLC controller with 8 isolated digital inputs and 8 relay outputs. Onboard RS-232, RS-485, UART, I²C, programmed in MP STUDIO ladder logic. DIN-rail mountable for automation, testing, HMI integration and machine control.
Adding an expansion module means the unit is dismantled and re-assembled to order, so such an order is difficult to exchange or refund. Some combinations are not available on some models; if yours cannot be built we will contact you.
International shipping (EMS · DHL · UPS) — calculated at checkout by destination & weight
Ships the next business day (regardless of order time)
Large orders may take 1 extra day to dispatch
Cancel before dispatch · request a return/exchange after delivery
Overview
/ OVERVIEWMPA-8A8R is an industrial PLC controller with 8 isolated digital inputs and 8 relay outputs. Onboard RS-232, RS-485, UART, I²C, programmed in MP STUDIO ladder logic. DIN-rail mountable for automation, testing, HMI integration and machine control.
Key features
- Programmed in MP STUDIO ladder logic
- 8 opto-isolated digital inputs, NPN/PNP selectable
- 8 relay outputs for AC/DC dry-contact switching
- Industrial communication: RS-485, RS-232, UART, I²C · Modbus RTU
- DIN-rail 35 mm mountable, isolated field I/O for the factory floor
Specifications
/ SPEC| Power input | DC 12V – 24V |
|---|---|
| Digital inputs | 8 |
| Relay outputs | 8 |
| High-speed pulse inputs | 3 |
| Encoder inputs | 3 |
| RS-232 | 1ch |
| RS-485 | 1ch |
| UART | 1ch |
| I²C | 1ch |
| Modbus RTU | Yes |
| LS Cnet | Yes |
Software
MP STUDIO — Ladder Logic
The MPS series is programmed in MP STUDIO, a free ladder-logic IDE. Draw the control logic as a ladder diagram and call analog, temperature, high-speed counter and pulse output straight from function blocks.
Ladder logic only
Contacts and coils — existing PLC experience transfers directly
Function blocks
ADC · NTEMP · HCNT · ENCODER · PWM, each a single block
Live monitoring
Ctrl+T to download, Ctrl+M to monitor and debug on the machine
Before the first download
Install MP STUDIO from the ILOGICS download centre, pick your model in the device list, set the COM port, and you can download straight away.
This model connects to the PC with an ordinary USB cable — no MP download cable is required, and the driver is Silicon Labs CP210x.
Power · Data retentionPower · Backup
DC 12V ~ 24V in, 5 V out — and your data survives the blackout
The controller takes DC 12V ~ 24V and an on-board regulator converts it to 5 V for the internal circuit. Size the supply for at least 24V 0.5A.
DC 12V ~ 24V
Size the supply for 24V 0.5A or more
5 V internal
On-board regulator conversion
+5 V out 1A
From the I²C terminal block
Supercapacitor hold-up
Holds the +5 V rail up through a power cut
Before wiring the supply
- An EEPROM section written about 100,000 times can fail, and a failed section reads back a random value after a power cut. For values that change constantly, use the supercapacitor method below.
- Do not exceed the stated input voltage range.
- Do not reverse the supply polarity or mis-wire the input.
Where the power goes
* Either source runs the controller: the external supply through the regulator, or the download port's 5 V directly. The supercapacitor sits on the same 5 V node and keeps it alive when both go away.
Power and data retention
| Input voltage | DC 12V ~ 24V |
| SMPS requirement | 24V 0.5A or more |
| Internal conversion | On-board regulator to 5 V |
| +5 V output | 1A max, from the +5 V pole of the I²C terminal block |
| USB-powered operation | Runs on the PC's 5 V through the download port |
| Non-volatile memory | EEPROM, about 100,000 writes per section |
| Hold-up on a power cut | Supercapacitor on the +5 V pole |
| Blackouts retained | More than 100,000, writing only when the mains drops |
Size the supply for 24V 0.5A or more, plus whatever the +5 V pole is feeding (up to 1A).
Keeping data through a blackout
Which method you want depends on how often the value changes. The first is a setting; the second needs one part and a few rungs.
EEPROM retentive area — values that change occasionally
Mark a retentive area under Settings → Data Memory in MP STUDIO and the runtime copies that memory into non-volatile EEPROM every time its value changes — no code to write. Because a section survives only about 100,000 writes, it belongs to setpoints, calibration data and machine configuration rather than to anything the scan updates.
Supercapacitor — values that change constantly
Fit a supercapacitor to the +5 V pole and the internal 5 V stays up for a moment after the main supply is cut. Wire the main supply into a digital input as well, add a rung that moves the live value into the retentive memory as soon as that input goes off, and a second rung that moves it back once on restart. The EEPROM is then written only at the instant of a blackout, so it survives more than 100,000 of them.
Downloads
/ FILESFAQ
How many I/O points does the MPA-8A8R have?▾
The MPA-8A8R provides 8 isolated digital inputs and 8 relay outputs, with onboard RS-485, RS-232, UART, I²C communication. See the specification table for the full breakdown.
Does the MPA-8A8R support Modbus RTU?▾
Yes. The MPA-8A8R supports Modbus RTU — master and slave alike — over its serial interface.
