Table of Contents

MNET-32A32R

MNET-32A32R is a communication slave I/O device that allows a master device such as a PC, HMI, or PLC to read digital inputs and control relay outputs over a communication link.

Provides 32 digital inputs and 32 relay outputs as standard. Select Modbus RTU Slave or LS Industrial Systems Cnet Slave when ordering.

This product does not accept downloaded user programs. The master device controls I/O by reading or writing addresses on MNET-32A32R.

Product Specifications

Category Quantity Terminals / Addresses Specifications
Product role - - Communication slave I/O
No user program
Module configuration 5 modules CPU
2 digital inputs modules
2 relay outputs modules 		Assembled and shipped in the selected configuration
Power - +24V, GND, F.G DC 24V power terminals
Digital inputs 32 points
(Isolated) 		0~31
Modbus 0~31
Cnet P0000~P0031 		DC 5~24V
NPN/PNP inputs
Optocoupler isolation
8 points/1COM
Relay outputs 32 points
(Isolated) 		0~31
Modbus 32~63
Cnet P0032~P0063 		Dry contacts
Max. DC 30V or AC 300V, 5A
4 points/1COM
Communication protocol Order option Modbus RTU Slave
LS Industrial Systems Cnet Slave 		Select one of the two protocols when ordering
Communication Channels 1 channel each RS-232
RS-485
UART 		Use the port wired to the master device
I²C 1 channel SDA, SCL CPU module terminals
Internal power - +5V, GND Int VCC terminals
Mounting - - 35mm DIN rail

Communication terminals

Identify the CPU module terminals for the communication interface used to connect the master device.

Communication interface Product terminal labels
RS-232 TX, RX, GND
RS-485 485+, 485−
UART TXD, RXD, GND

Digital inputs

See the one-channel digital-input check before wiring for the first time. →

Group Number of inputs Communication address Input configuration
Input 0~7 group 0~7 Modbus 0~7
Cnet P0000~P0007 		8 isolated digital inputs
DC 5~24V
NPN/PNP inputs
Input 8~15 group 8~15 Modbus 8~15
Cnet P0008~P0015 		8 isolated digital inputs
DC 5~24V
NPN/PNP inputs
Input 16~23 group 16~23 Modbus 16~23
Cnet P0016~P0023 		8 isolated digital inputs
DC 5~24V
NPN/PNP inputs
Input 24~31 group 24~31 Modbus 24~31
Cnet P0024~P0031 		8 isolated digital inputs
DC 5~24V
NPN/PNP inputs

Digital inputs share one COM terminal for every 8 points, giving a total of 4 COM groups.

Relay outputs

See the one-channel relay-output check before wiring for the first time. →

Group Number of outputs Communication address Output configuration
Output 0~3 group 0~3 Modbus 32~35
Cnet P0032~P0035 		4 dry relay contacts
Output 4~7 group 4~7 Modbus 36~39
Cnet P0036~P0039 		4 dry relay contacts
Output 8~11 group 8~11 Modbus 40~43
Cnet P0040~P0043 		4 dry relay contacts
Output 12~15 group 12~15 Modbus 44~47
Cnet P0044~P0047 		4 dry relay contacts
Output 16~19 group 16~19 Modbus 48~51
Cnet P0048~P0051 		4 dry relay contacts
Output 20~23 group 20~23 Modbus 52~55
Cnet P0052~P0055 		4 dry relay contacts
Output 24~27 group 24~27 Modbus 56~59
Cnet P0056~P0059 		4 dry relay contacts
Output 28~31 group 28~31 Modbus 60~63
Cnet P0060~P0063 		4 dry relay contacts

Relay outputs share one COM terminal for every 4 points, giving a total of 8 COM groups. The output contact rating is up to DC 30V or AC 300V, 5A.

Inputs use 8 points/1COM and outputs use 4 points/1COM, so the COM groupings differ between the two terminal blocks.

Basic I/O communication addresses

Category Points Modbus RTU internal address
(Decimal) 		LS Industrial Systems Cnet Operation
Input 0~31 0~31 P0000~P0031 Read
Output 0~31 32~63 P0032~P0063 Read / Write
State - 1000 M0000 Check status

For this model, input addresses end at 31 and output addresses start at 32, making the two ranges contiguous.

DIP switch settings

The baud-rate DIP switch has 3 bits; switches 1·2·3 have values 4·2·1 respectively. The leftmost switch is the most significant bit.

Set value Baud rate Switch 1 Switch 2 Switch 3
0 9,600bps OFF OFF OFF
1 14,400bps OFF OFF ON
2 19,200bps OFF ON OFF
3 28,800bps OFF ON ON
4 38,400bps ON OFF OFF
5 57,600bps ON OFF ON
6 76,800bps ON ON OFF
7 115,200bps ON ON ON

The slave-address DIP switch has 4 bits; switches 1·2·3·4 have values 8·4·2·1 respectively.

Setting example Switch 1
(8) 		Switch 2
(4) 		Switch 3
(2) 		Switch 4
(1)
Address 0 OFF OFF OFF OFF
Address 1 OFF OFF OFF ON
Address 5 OFF ON OFF ON
Address 10 ON OFF ON OFF
Address 15 ON ON ON ON

Set the DIP switches with power off. The master device's baud rate, data bits, parity, and stop bits must match the communication settings of the delivered product.

Optional modules

Code Function Points per module Maximum configuration Value format
X Analog inputs 4 points X~X5, up to 20 points 15bit, 0~32,767
NTC mode: temperature ×10
F PT100Ω temperature sensor input 4 points F~F5, up to 20 points −200~800℃
Temperature ×10
Y Analog outputs 3 points Y~Y4, up to 12 points 16bit, 0~65,535
K High-speed pulse outputs 6 points K~K2, up to 12 points DC 5V, 30mA or less
Max. 1MHz

The X module offers selectable DC 0~5V, DC 0~10V, 0(4)~20mA, or NTC inputs. Connect a 2-wire or 3-wire PT100Ω sensor to the F module. The Y module offers selectable DC 0~5V, DC 0~10V, or 0(4)~20mA outputs.

Available option combinations depend on the product. Products with optional modules are assembled in the selected configuration, so exchanges or refunds after purchase may be difficult.

Configure analog inputs (X) and PT100Ω inputs (F) for a combined maximum of 20 points, and analog outputs (Y) and high-speed pulse outputs (K) for a combined maximum of 12 points. You cannot order a configuration that simply adds the maximum point count of every module.

Options are assembled and shipped in the selected configuration; users cannot add or remove I/O or optional modules. Also see MNET Series option configuration guide.

Interpreting option values

Option module communication addresses

Use the address ranges below that correspond to the installed optional modules. The slave-address DIP switch selects the station address of the product to communicate with; the addresses in this table select items to read or write within that product.

Module channel Modbus RTU internal address
(Decimal) 		LS Industrial Systems Cnet
X1 0~3 2000~2003 D0000~D0003
X2 4~7 2004~2007 D0004~D0007
X3 - 2008~2011 D0008~D0011
X4 - 2012~2015 D0012~D0015
X5 - 2016~2019 D0016~D0019
Y1 0~2 2020~2022 D0020~D0022
Y2 3~5 2023~2025 D0023~D0025
Y3 6~8 2026~2028 D0026~D0028
Y4 9~11 2029~2031 D0029~D0031
F1 0~3 2040~2043 D0040~D0043
F2 4~7 2044~2047 D0044~D0047
F3 - 2048~2051 D0048~D0051
F4 - 2052~2055 D0052~D0055
F5 - 2056~2059 D0056~D0059
K1 PWM0~PWM5 2060~2065 D0060~D0065
K2 PWM6~PWM11 2066~2071 D0066~D0071

The confirmed separate addresses for the X module in NTC mode are as follows.

Module Modbus RTU internal address
(Decimal) 		LS Industrial Systems Cnet
X1 NTC 2080~2083 D2080~D2083
X2 NTC 2084~2087 D2084~D2087

The Cnet addresses for NTC are D2080~D2087. Enter these addresses using their own notation, distinguishing it from other option addresses.

Communication startup sequence

  1. Verify that the ordered product's communication protocol matches the master device.
  2. Turn off power and wire the required RS-232, RS-485, or UART port.
  3. Set the baud-rate and slave-address DIP switches.
  4. Match the master device port, baud rate, data bits, parity, stop bits, and target slave address to the delivered product settings.
  5. Check wiring and settings, then turn on the power.
  6. Read the first input to check communication. The Modbus RTU internal address is 0 and the LS Industrial Systems Cnet address is P0000.
  7. Verify that the load is safe for an output test, then control the first output. The Modbus RTU internal address is 32 and the LS Industrial Systems Cnet address is P0032.
  8. After verification, apply all required addresses in order.

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