MPS-16A8R8T

Digital input

16 isolated digital input channels

16 digital input channels read external switches and sensors straight from the terminal block. In the ladder program they are the contacts P0–P15.

• P0–P15 inputs

  16 isolated digital input points in total

• 

  COM0 / COM1 commons

  COM0 = P0–P7 · COM1 = P8–P15 (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

Transistor output

8 non-isolated sinking transistor output channels

8 transistor output channels switch external loads. When the ladder turns one of the output contacts P32–P39 on, that terminal is driven to GND — a sinking output.

• 

  P32–P39 outputs

  8 non-isolated sinking transistor output points

• 

  V+ / GND supply

  Connect the load supply's P(+) to V+ and its N(−) to GND

• 

  Non-isolated sinking output

  The output's reference potential is the board's own GND

• 

  Sinking output, 1 A

  Up to 1 A per point · up to 6 A across all 8 points

Output channel layout

* Example wiring for external loads — the load goes between V+ and the output terminal. ⚠️ Applying a P(+) voltage to an output terminal while that output is ON shorts it and destroys the transistor.

Relay output

8 isolated relay output channels, volt-free contacts

8 relay output channels switch external loads. Turning one of the output contacts P40–P47 on in the ladder closes that contact onto its COM — a volt-free contact, so it takes DC and AC loads alike.

• 

  P40–P47 outputs

  8 isolated relay output points

• 

  COM3 / COM4 / COM5 / COM6 commons

  COM3 = P40–P41 · COM4 = P42–P43 · COM5 = P44–P45 · COM6 = P46–P47 (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 the input range is set on the board itself: 3 ranges, whose setting method is in the table below. The ladder reads a channel with the ADC function block.

• AI0–AI3 · 4 channels

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

• 3 selectable ranges

  0(4)–20 mA · DC 0(1)–5 V · DC 0–10 V

• Set on the board

  The header cap picks the range — no wiring change

• ADC2 for 4–20 mA

  A current or 1–5 V sensor reads 0–818

Analog input terminal

* The screw block reads AI0 · AI1 · AI2 · AI3 and AGND. The range is chosen by the header beside it, and the same choice applies to the channels wired through it — check it before wiring a sensor.

Temperature inputNTC

2 NTC temperature channels on a terminal block of their own

2 NTC temperature channels, T0 · T1, on a terminal block of their own with a shared AGND pole — separate from the analog input block. The ladder reads one with the NTEMP function block, which returns tenths of a degree — 234 means 23.4℃.

• 2 NTC channels

  T0 · T1

• -40℃ to 120℃

  Measuring range, resolution 0.1℃

• NTEMP function block

  CHANNEL and OUT — a reading of 234 is 23.4℃

• NTC 3950K 10KΩ(25℃)

  Thermistor this input is scaled for

NTC terminals

* Both channels sit on one terminal block and share the AGND pole. The input is scaled for a NTC 3950K 10KΩ(25℃) thermistor; a 10KΩ pull-up is fitted on the board and the divider hangs off the 2.5 V reference and reaches the MCU through a low-pass filter.

Analog outputAnalog Output

2 analog output channels — DC 0–5 V at 16-bit resolution

AO0–AO1 come out on a screw block along the board's left edge. The ladder writes a number with the DAC function block and the converter turns it into a voltage — 16 bits across 0–65535, which is the finest resolution anywhere in this series. DC 0–10 V is available as a factory change.

• AO0–AO1 · 2 channels

  DC 0–5 V analog output

• 16-bit resolution

  0–65535 across the full range

• DAC function block

  Written straight from the ladder — no library

• External supply required

  Nothing comes out on USB 5V alone

How the output is produced

* A screw block on the board's left edge, reading AO0 then AO1. The manual publishes no ground pole for this block — take the reference potential from the board's own ground terminals (AGND · GND).

High-speed pulse outputPWM Output

4 PWM output points on 2 independent timers

PWM0–PWM4 are 4 pulse outputs driven by 2 timer resources — channel 0 = PWM0–PWM1 · channel 1 = PWM3–PWM4. 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.

• 4 PWM points

  PWM0–PWM4 · DC 0 V / DC 5 V output

• 2 timers

  channel 0 = PWM0–PWM1 · channel 1 = PWM3–PWM4

• 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 · GND / PWM3 · PWM4 · GND. channel 0 = PWM0–PWM1 · channel 1 = PWM3–PWM4.

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 on their own common COM2. 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

  H0 · H1, returning to their own common COM2

• 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

  HIGH from DC 5 V or above

What the two kinds of input are for

* The counter poles are isolated: a 24V pulse source connects straight to H0 · H1 with its return on COM2, 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 down the board's right edge

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 nine-pole screw block down the board's right edge. I²C reads SDA · SCL and carries 4.7kΩ pull-ups, so an I²C device connects with no external resistors. The UART (channel 3) group continues along the same block and has 3 poles — the manual does not name its poles, so it is not drawn above.

* 485+ and 485- are poles of the nine-pole screw block down the board's right 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 2 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 = PWM3 · DIO = PWM4 is the pair the manufacturer's own wiring article uses — and +5V and GND come off the +5V pole of the power block; the ground is the GND pole already in the pulse-output group, 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 2 displays

  Each on its own pair of poles

• Powered from the board

  +5V · GND · 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 PWM3 · PWM4 · +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 PWM0 with PWM1, and PWM3 with PWM4, can serve as CLK and DIO, and gives PWM3 = CLK, PWM4 = DIO as its example. The two pairs below are the article's own, and they are the same two timer groups the manual's pulse-output circuit figure draws.

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 160.0 × 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

• 160.0 × 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.