MPS-8A8R

Digital input

8 isolated digital input channels

8 digital input channels read external switches and sensors straight from the terminal block. In the ladder program they are the contacts P0–P7.

• P0–P7 inputs

  8 isolated digital input points in total

• 

  COM0 commons

  COM0 = P0–P7 (8 points per COM)

• 

  DC 0–40 V input

  DC 5 V and above reads as HIGH · optocoupler isolated

• 

  NPN / PNP sensors

  Either sensor wiring convention is read as-is

Input channel layout

* Example wiring for external switches or sensors — applying DC 12–24 V at the terminal turns that contact memory ON

Relay output

8 isolated relay output channels, volt-free contacts

8 relay output channels switch external loads. Turning one of the output contacts P32–P39 on in the ladder closes that contact onto its COM — a volt-free contact, so it takes DC and AC loads alike.

• 

  P32–P39 outputs

  8 isolated relay output points

• 

  COM2 / COM3 / COM4 / COM5 commons

  COM2 = P32–P33 · COM3 = P34–P35 · COM4 = P36–P37 · COM5 = P38–P39 (2 points per COM)

• 

  DC or AC loads

  0–30 V D.C / 0–250 V A.C volt-free contact

• 

  Rated 5 A

  Up to 5 A per point

Output channel layout

* Example wiring for external loads — the load supply comes in on the COM side. The relay contact is volt-free, so it may switch DC of either polarity or AC. The contact is rated 0–30 V D.C / 0–250 V A.C, up to 5 a per point.

Analog inputAnalog Input

4 analog input channels on a screw block — the range is selected on the board

AI0–AI3 and AGND come out on one screw block. All 4 channels are 10-bit, and every channel carries its OWN 4-position jumper: DC 0(1)–5 V · DC 0–10 V · 0(4)–20 mA · NTC 10 kΩ 3950K temperature sensor. A temperature probe therefore goes on the same channels as any other analog signal. The ladder reads a channel with the ADC function block, or with NTEMP when that channel is set to NTC.

• AI0–AI3 · 4 channels

  4 analog input points, 10-bit (0–1023)

• 4 selectable ranges

  DC 0(1)–5 V · DC 0–10 V · 0(4)–20 mA · NTC 10 kΩ 3950K temperature sensor

• Jumper selected, per channel

  Its own 4-position jumper on every channel — no wiring change

• Reference 2.5 V ±0.2%

  The reference the analog front end measures against

Analog input terminal

* The screw block reads AI0 · AI1 · AI2 · AI3 and AGND. The block itself is silkscreened ADC0 · ADC1 · ADC2 · ADC3 · AGND. Each channel's mode is set on its own 4-position jumper inside the board — check the jumper before wiring a sensor.

High-speed pulse outputPWM Output

6 PWM output points on 2 independent timers

PWM0–PWM5 are 6 pulse outputs driven by 2 timer resources — channel 0 = PWM0–PWM2 · channel 1 = PWM3–PWM5. Ports on the SAME timer share a WIDTH and a frequency; the two groups are independent of each other, so this board can emit two different frequencies at once. The output swings DC 0 V LOW to DC 5 V HIGH at up to 30 mA per point.

• 6 PWM points

  PWM0–PWM5 · DC 0 V / DC 5 V output

• 2 timers

  channel 0 = PWM0–PWM2 · channel 1 = PWM3–PWM5

• DUTY / WIDTH 0–65535

  Set the pulse directly, or give a frequency instead

• DC 5 V · 30 mA

  LOW DC 0 V / HIGH DC 5 V · up to 30 mA per point

Pulse output header and duty

* 2 headers, silkscreened PWM0 · PWM1 · PWM2 · GND / PWM3 · PWM4 · PWM5 · GND. channel 0 = PWM0–PWM2 · channel 1 = PWM3–PWM5.

High-speed counter · encoderCounter · Encoder

2 isolated counter points up to 5kHz, plus one encoder channel

The two counter points are OPTOCOUPLED — they take DC 0–80 V straight off a field device, either polarity, on their own common COM1. The encoder is a separate, non-isolated channel on the I2C pair, and it doubles as counter channel 2 for open-collector pulse sources. The ladder reads both with the HCNT and ENCODER function blocks.

• 2 isolated counter points

  HCNT0 · HCNT1, returning to their own common COM1

• Encoder A and B phases

  SDA is the A phase and SCL the B phase — B lagging A counts up

• 4.7 kΩ pull-up on the encoder pair

  Built into the I2C lines — no external resistors

• DC 0–80 V · 5kHz

  NPN or PNP, HIGH from DC 5 V or above

What the two kinds of input are for

* The counter poles are isolated: a DC 5~24V pulse source connects straight to HCNT0 · HCNT1 with its return on COM1, and HIGH is recognised from DC 5 V or above. The encoder pair is a different circuit — DC 0–5 V with a 4.7 kΩ pull-up already on the board.

CommunicationRS-232 · RS-485 · UART

3 serial channels and one I²C channel, all on the top terminal row

This board brings out RS-232 · RS-485 · UART at the same time — RS-232 is channel 1, RS-485 is channel 2, UART is channel 3 in MP STUDIO's communication-port settings. All of them speak Modbus RTU and LS Cnet (XBC/LINK) as a slave, or your own protocol in NORMAL MODE. I²C is a separate master-mode channel with its pull-ups already fitted.

• 3 serial channels

  RS-232 = channel 1 · RS-485 = channel 2 · UART = channel 3

• RS-485 multidrop

  485+ and 485- — one pair, many nodes

• Modbus RTU slave

  Also Cubloc Modbus RTU and LS Cnet (XBC/LINK), as a slave

• I²C · 1 channel

  Master mode · 1:N · 4.7kΩ pull-ups built in

* All four channels are on the long screw row along the top edge. I²C reads SDA · SCL and carries 4.7kΩ pull-ups, so an I²C device connects with no external resistors.

* 485+ and 485- are poles of the long screw row along the top edge. It is channel 2 in MP STUDIO's communication-port settings, and one pair carries every node on the bus.

7-segment (FND) connectionFND · TM1637

A four-digit 7-segment display on two signal wires — up to 3 of them

The display module carries a TM1637 driver, so a four-digit readout needs only a clock line and a data line. This board has no dedicated display connector: the two signals go on ordinary screw poles — CLK = PWM4 · DIO = PWM5 is the pair the manufacturer's own wiring article uses — and +5V and GND come off the bottom power group (+5V · +24V · GND), which makes the whole run four wires. The ladder drives it with the FINI · FINT · FDATA function blocks.

• Two wires: CLK and DIO

  A TM1637 four-digit module needs no more

• Up to 3 displays

  Each on its own pair of poles

• Powered from the board

  +5V · GND on the bottom power group · up to 1A

• FINI · FINT · FDATA

  Ladder function blocks — initialise, print a number, drive the segments

Connection from the wiring article

* The poles are silkscreened PWM4 · PWM5 · +5V · GND; nothing on the board says CLK or DIO, so the role of each wire is printed where it lands. The display comes in a decimal-point form and a time-displaying form, both sold separately.

* Every display needs its own CLK and DIO pair; +5V and GND are shared by all of them. The manufacturer's own article says all six of PWM0–PWM5 can serve as CLK and DIO, and gives PWM4 = CLK, PWM5 = DIO as its example. The pairs below are one valid allocation, taken in port order — which two ports make a pair is your choice.

Power · Data retentionPower · Backup

DC 12V ~ 24V in, 5 V out — and your data survives the blackout

The controller takes DC 12V ~ 24V and converts it to 5 V internally with a LM2576 regulator. Size the supply for at least 24V 0.5A.

• DC 12V ~ 24V

  Size the supply for 24V 0.5A or more

• 5 V internal

  LM2576 DC-DC conversion

• +5 V out 1A

  From the power terminal block — it takes 5 V in too

• Supercapacitor hold-up

  About ten seconds on the +5 V pole

Where the power goes

* Any of three sources runs the controller: the external supply through the regulator, the download port's 5 V, or DC 5 V fed straight into the +5 V pole. The supercapacitor sits on that same 5 V node and keeps it alive when they go away.

Mounting · DIN railDIN Rail

Clips onto a 35 mm DIN rail, or screws down through the PCB's own holes

Inside a control panel the board clips onto a 35 mm DIN rail; built into a machine it screws down through the Ø3.5 mounting holes in the PCB. The board measures 151.8 × 100.0 mm without the rail clip, and stands 114.2 mm high once the clip is closed on the rail.

• 35 mm DIN rail

  Clips onto the rail in a control panel

• Direct PCB mounting

  Screws through the Ø3.5 mounting holes

• 151.8 × 100.0 mm

  PCB outline with no rail clip fitted

• 114.2 mm engaged

  119.4 mm with the clip open, 114.2 mm closed

Mounting on a 35 mm DIN rail

* The clip hooks over a 35 mm DIN rail. Overall height is 119.4 mm with the clip open and 114.2 mm once it is closed and engaged. The drawing shows the mounting method rather than the clip's own shape.

* The outline and mounting holes with no rail clip fitted. All dimensions in millimetres.