MPA-32A16R

Digital input

32 isolated digital input channels

32 digital input channels read external switches and sensors straight from the terminal block. In the ladder program they are the contacts P0–P31. The inputs are split 16 + 16 across 2 I/O modules.

• P0–P31 inputs

  32 isolated digital input points in total

• 

  COM0 / COM1 commons (2 per module)

  Module 0 COM0 = P0–P7 · COM1 = P8–P15 | Module 1 COM0 = P16–P23 · COM1 = P24–P31 (8 points per COM)

• 

  DC 0–80 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 5 V–24 V at the terminal turns that contact memory ON

Relay output

16 isolated relay contact outputs

16 volt-free relay contacts switch DC or AC loads directly. In the ladder program, turning the contacts P32–P47 ON closes the matching relay onto its COM.

• 

  P32–P47 outputs

  16 isolated relay points in total

• 

  COM0 / COM1 / COM2 / COM3 commons

  COM0 = P32–P35 · COM1 = P36–P39 · COM2 = P40–P43 · COM3 = P44–P47 (4 points per COM)

• 

  DC 0–30 V / AC 0–250 V

  Volt-free contacts, so DC and AC loads both wire straight to the terminal

• 

  5A / 1POINT · 8A / 1COM

  Maximum switching current, per point and per COM

Relay output layout

* Each block of 4 points shares one COM — the load supply arrives on that COM

High-speed counter · encoder

2 isolated high-speed counter / encoder channels

Pulses that arrive faster than one program scan are counted in hardware. Counter channels 0 and 1 are the digital input contacts P0 · P1 themselves, so no extra terminal is needed — and the same contacts read a two-phase encoder.

• P0 · P1 counters

  Max 8kHz, counting 0 ~ 4,294,967,295 — read with the HCNT function block

• Encoder pairs

  Channel 0 P0(A)·P2(B) · Channel 1 P1(A)·P3(B) — Max 8kHz, -2,147,483,648 ~ 2,147,483,647

• Shared with the inputs

  There are no counter or encoder terminals of their own — the contacts they use are P0 · P1.

Counter and encoder wiring

* The counter and the encoder are wired to the same contacts.

Communication

three serial channels plus I²C

RS-232 · RS-485 · UART sit on the CPU module's terminal block as three independent channels, each with its own MP STUDIO channel number (Channel 1 · Channel 2 · Channel 3), and an I²C master port sits beside them. A user-defined protocol can be written in NORMAL MODE with the PUT, GET, PUTLEN, GETLEN function blocks.

• RS-485 multidrop

  485+ and 485- — two wires carry several devices on one pair

• Modbus RTU

  Master on one channel of the three, slave on every channel.

• I²C · 1:N

  SDA · SCL · +5V · GND — master mode only, for a character LCD and other I²C devices

• Ethernet via M-ETHER

  M-ETHER converts Ethernet to RS-232 / RS-485, and Download Mode makes remote download and debugging possible

* Several devices share one 485+ / 485- pair. The channel number the ladder uses is Channel 2.

* All four groups are screw poles on the CPU module, silkscreened I2C · RS232 · RS485 · UART. Note that RS-232 is marked TX / RX while UART is marked TXD / RXD.

7-segment (FND) connectionFND · TM1637

A four-digit 7-segment display on two signal wires

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 = RXD · DIO = TXD is the pair the manufacturer's own wiring article uses — and +5V and GND come off the I2C terminal block's +5V and GND (the signals come from the UART poles), 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

• One display

  This board brings out a single CLK / DIO pair

• Powered from the board

  +5V · GND on the I2C terminal block

• FINI · FINT · FDATA

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

Connection from the wiring article

* The poles are silkscreened RXD · TXD · +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.

* The display's CLK and DIO lines land on these two poles; +5V and GND come from the group named above. The manufacturer's own article assigns the UART port's RXD to CLK and TXD to DIO. The channel has one of each, so there is a single pair — and while a display is connected, that channel cannot carry serial communication.

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

  From the I²C terminal block — limit not published

• Supercapacitor hold-up

  Holds the +5 V rail up through a power cut

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.

Mounting · DIN railDIN Rail

A sealed enclosure that clips onto a 35 mm DIN rail

The controller ships as a sealed enclosure: a CPU bay plus 3 I/O bays, 109 × 108 mm across the front and 83 mm deep with the clip. Two sliding clips hook it onto a 35 mm DIN rail; where no rail is used, the Ø4 holes in the clip feet take a screw. Overall height is 120.42 mm with the clips open and 115.16 mm once they are closed on the rail.

• 35 mm DIN rail

  Two sliding clips hook over the rail

• Direct screw mounting

  Through the Ø4 holes in the clip feet

• 109 × 108 mm

  Enclosure front, 83 mm deep (79 mm body)

• 115.16 mm engaged

  120.42 mm with the clips open

Mounting on a 35 mm DIN rail

* The clips hook over a 35 mm DIN rail. Overall height is 120.42 mm with them open and 115.16 mm once closed and engaged. The drawing shows the mounting method rather than the clips' own shape.

* The enclosure front with the clips open. All dimensions in millimetres.

Important notesX · F · Y · K

Expansion modules (X · F · Y · K) are built into the same enclosure as the base unit, in the configuration you order. That is why the combinations have limits.