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IO-Link Master Unit
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last update: March 9, 2026
IO-Link Master Unit
GD-ILM16C-MLP/GD-ILM16E-MLP
General specifications
| Item | GD-ILM16C-MLP | GD-ILM16E-MLP | |
|---|---|---|---|
| Number of ports | 16 | ||
| Power supply voltage | 24 VDC ±15% (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) | ||
| Current consumption (Only Master Unit) | 195 mA or less | ||
| Maximum current of the port | 0.2 A or less per 1 port, 2.5 A or less per 16 port | ||
| Maximum power current | 8 A (Total of unit power supply and I/O power supply) | ||
| Insulation resistance | 20 MΩ or more (between external power supply and unit power supply at 500 VDC) | ||
| Connectors | Field network | 2×RJ45 Socket | |
| Power supply | Spring-clamp terminal block, 5-pole, 2-row | ||
| Input/output | 3×16-channel spring-clamp terminal blocks | 16×e-CON sockets, 4 poles | |
| Indicators | POWER LED (blue green), EVENT LED (yellow), ALARM LED (red), I/O LED (orange) | ||
| Display | OLED (Display language: English, Japanese, Simplified Chinese, Traditional
Chinese, Korean, French, Spanish, German, Portuguese, Italian) |
||
| Field network | • EtherNet/IP
• Ethernet & Modbus/TCP • CC-Link IE Field Basic (Switch in settings) |
||
| I/O assignment | Switchable in the following 6 modes by setting for each port:
• Unused (default) • IO-Link communication mode • SIO (PNP input) mode • SIO (NPN input) mode • SIO (PNP output) mode • SIO (NPN output) mode |
||
|
IO-Link
Communication Specifications |
IO-Link revision | 1.1 | |
|
Communication
speed |
COM1 (4,800 bps)/COM2 (38,400 bps)/COM3 (230.4 kbps) | ||
| Physical layer | IO-Link-compliant | ||
| Minimum cycle time | 0.3 ms | ||
| Data | Periodic: Process data, Status Aperiodic: Devices data, Event | ||
|
Input
Specifications |
Rated input voltage | 24 VDC ±20% (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) *1 | |
|
Voltage and current
at ON |
PNP: 15 VDC or more, 5.5 mA or more | ||
| NPN: Power supply voltage -13 VDC or less, 3.0 mA or more | |||
|
Voltage and current
at OFF |
PNP: 10 VDC or less, 2.0 mA or less | ||
| NPN: Power supply voltage -8 VDC or more, 2.0 mA or less | |||
| Input resistance | PNP: 5.5 mA rated current circuit load, NPN: 4.7 kΩ | ||
| Input filter time | 0 ms (default), 0.1 ms, 1 ms, 5 ms, 10 ms, 20 ms | ||
|
Output
Specifications |
Rated load voltage | 10.8 to 26.4 VDC (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) *1 | |
|
Maximum output
load current |
0.2 A per 1 port, 2.5 A per 16 port | ||
|
Overcurrent
protection current |
Current limiting (0.5 A) by Overcurrent protection function | ||
|
OFF output leakage
current |
PNP: 0.1 mA or less NPN: 0.2 mA or less | ||
| Residual Voltage | PNP: 1.8 V or less, NPN: 1.6 V or less | ||
|
Output response
time |
0.1 ms or less | ||
|
Environmental
resistance |
Operating/
Storage temperature |
Operating: 0 to 55°C
Storage: -25 to +75°C (no freezing or condensation) |
|
|
Operating/
Storage humidity |
Operating/Storage: 5 to 95% RH (no condensation) | ||
| Vibration resistance | IEC 61131-2 compliant
Vibration frequency: 5 to 8.4 Hz, single amplitude: 3.5 mm Vibration frequency: 8.4 to 150 Hz, acceleration: 10 m/s2 (1.0 G) Number of sweeps: 10 times each in 3 directions along X, Y, and Z axes |
||
| Shock resistance | IEC 61131-2 compliant
Peak acceleration: 150 m/s2 (15 G), 3 times each in 3 directions along X, Y, and Z axes (total of 18 times) |
||
|
Operating
environment |
No corrosive gas | ||
| Operating altitude | 0 to 2,000 m | ||
| Installation location | In door use | ||
|
Degree of
protection |
IP20 | ||
| Overvoltage category | ǁ or less | ||
| Pollution degree | 2 or less | ||
| Equipment class | Class ǀ | ||
| Material | Case: PC, keys/DIN rail mounting hook: POM, terminal block: PA | ||
| Weight | Approx. 195 g (including terminal blocks, when not wired) | ||
| Included accessories | Instruction manual, compliance sheet, power terminal block, 2×RJ45 connector protective cap (attached to unit) | ||
| 3×device terminal block | --- | ||
*1. Use a Class 2 power supply or a power supply compliant with SELV (Safety Extra-Low Voltage) circuit and LIM (Limited Energy Circuit) circuit standards.
Field network communication specifications
EtherNet/IP Communication Specifications
| Item | GD-ILM16[]-MLP |
|---|---|
| Host Network Communication Protocol | EtherNet/IP |
| Applicable version | EtherNet/IP adapter |
| Authentication version | CT21 |
| Conforming standard | IEEE802.3u |
| Transmission speed | 10 Mbps (10BASE-T), 100 Mbps (100BASE-TX) |
| Cable | Twisted pair cable (STP)
Category 5/5e or higher |
| Ethernet Connection Type | Star configuration, linear bus configuration, device level ring configuration |
| Distance between nodes | Within 100 m |
| IP address configuration | Static IP address only |
| Cyclic Communication (Implicit Message) | Class 1 service |
| Acyclic Communication (Explicit Message) | • Class 3 message
• UCMM |
| Support objects | • Identity object
• Message Router object • Assembly object • Connection Manager object • DLR object • QoS object • TCP/IP Interface object • Ethernet Link object • This unit's object • IO-Link device object connected to this unit |
| Reset service | • Type0
• Type1 |
| Maximum no. of connections | Class 1: 5, Class 3: 8, UCMM: 8 |
| Packet interval (RPI) | 1 to 3,200 ms |
| Unit Allowable Communications Band Width | 1,000 pps |
| EtherNet/IP Product Internal Response Time | 0.6 ms or less |
| Extended access function | This function uses cyclic communication to read and write settings for
this product and IO-Link devices. Host master side programs can be simplified. |
| Other functions | • ACD (Address Conflict Detection)
• DLR (Device Level Ring) • Auto Negotiation • Auto MDIX • Quick Connect |
Ethernet & Modbus/TCP Communication Specifications
| Item | GD-ILM16[]-MLP | |
|---|---|---|
| Host network communication protocol | Modbus TCP/UDP communication or Ethernet socket communication | |
| Conforming standard | IEEE802.3u | |
| Transmission speed | 10 Mbps (10BASE-T), 100 Mbps (100BASE-TX) | |
| Cable | Twisted pair cable (STP) Category 5, 5e and above | |
| Ethernet connection type | Star configuration, linear bus configuration | |
|
Modbus
communication |
Master (client)/Server | Operates as a Modbus server |
| Transport layer protocol | TCP or UDP | |
| Port number | 502 (common to TCP/IP and UDP/IP) | |
| Corresponding function code | 3, 6, 16, 23 | |
| Register number | 400001 to 465536 | |
| Distance between nodes | Within 100 m | |
| IP address setting | Static IP address only | |
| Number of connectable units | Number of units that can be connected from one Modbus/TCP master:
It depends on the specifications of the Modbus/TCP master |
|
|
Number of simultaneous
connections |
Modbus/TCP: 2
Modbus/UDP: 4 |
|
|
Socket
communication |
Transport layer protocol | TCP or UDP |
| Port number | 2001 (common to TCP/IP and UDP/IP) | |
| IP address setting | Static IP address only | |
|
Number of simultaneous
connections |
TCP/IP: 2
UDP/IP: 4 |
|
CC-Link IE Field Basic Communication Specifications
| Item | GD-ILM16[]-MLP | |
|---|---|---|
| Host network communication protocol | CC-Link IE Field Basic communication, socket communication (UDP/IP, TCP/IP), or Modbus/TCP | |
| Conforming standard | IEEE802.3u | |
| Transmission speed | 100 Mbps (100BASE-TX) | |
| Cable | Twisted pair cable (STP) Category 5, 5e or higher | |
| Ethernet connection type | Star configuration, linear bus configuration | |
|
Cyclic
communication |
Method | CC-Link IE Field Basic cyclic transmission |
| By station type | Slave station | |
| Number of occupied stations | 1 station | |
| Distance between nodes | Within 100 m | |
| IP address setting | Static IP address | |
| Product standard response time | 0.6 ms | |
| Extended access function | This function uses cyclic communication to read and write settings for
this product and IO-Link devices. Host master side programs can be simplified. |
|
| Port number | • Cyclic data transmission: 61450 (UDP)
• Node connection: 61451 (UDP) |
|
|
Acyclic
communication |
Method | Socket communication (UDP/IP or TCP/IP) or Modbus/
TCP communication |
| Access target | Both socket communication and Modbus/TCP:
Reading and writing of setting values is possible, as well as reading of process data (writing to process data is not applicable). Note: Socket communication setting values background access mode is possible. |
|
|
Number of simultaneous
connections |
• Socket communication (UDP/IP: 4, TCP/IP: 1)
• Modbus/TCP communication: 2 |
|
| IP address setting | Static IP address | |
| Port number | • Socket communication: 2001 (both TCP and UDP)
• Modbus/TCP communication: 502 |
|
GD-ILM16C-CLI/GD-ILM16E-CLI
General specifications
| Item | GD-ILM16C-CLI | GD-ILM16E-CLI | |
|---|---|---|---|
| Number of ports | 16 | ||
| Power supply voltage | 24 VDC ±15% (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) | ||
| Current consumption (Only Master Unit) | 220 mA or less | ||
| Maximum current of the port | 0.2 A or less per 1 port, 2.5 A or less per 16 port | ||
| Maximum power current | 8 A (Total of unit power supply and I/O power supply) | ||
| Insulation resistance | 20 MΩ or more (between external power supply and unit power supply at 500 VDC) | ||
| Connectors | Field network | 2×RJ45 Socket | |
| Power supply | Spring-clamp terminal block, 5-pole, 2-row | ||
| Input/output | 3×16-channel spring-clamp terminal blocks | 16×e-CON sockets, 4 poles | |
| Indicators | POWER LED (blue green), EVENT LED (yellow), ALARM LED (red), I/O LED (orange) | ||
| Display | OLED (Display language: English, Japanese, Simplified Chinese, Traditional Chinese, Korean, French, Spanish, German, Portuguese, Italian) | ||
| Field network | • CC-Link IE Field
• CC-Link IE TSN (Switch in settings) |
||
| I/O assignment | Switchable in the following 6 modes by setting for each port:
• Unused (default) • IO-Link communication mode • SIO (PNP input) mode • SIO (NPN input) mode • SIO (PNP output) mode • SIO (NPN output) mode |
||
|
IO-Link
Communication Specifications |
IO-Link revision | 1.1 | |
| Communication speed | COM1 (4,800 bps)/COM2 (38,400 bps)/COM3 (230.4 kbps) | ||
| Physical layer | IO-Link-compliant | ||
| Minimum cycle time | 0.3 ms | ||
| Data | Periodic: Process data, Status
Aperiodic: Devices data, Event |
||
|
Input
Specifications |
Rated input voltage | 24 VDC ±20% (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) *1 | |
| Voltage and current at ON | PNP: 15 VDC or more, 5.5 mA or more | ||
| NPN: Power supply voltage -13 VDC or less, 3.0 mA or more | |||
| Voltage and current at OFF | PNP: 10 VDC or less, 2.0 mA or less | ||
| NPN: Power supply voltage -8 VDC or more, 2.0 mA or less | |||
| Input resistance | PNP: 5.5 mA rated current circuit load, NPN: 4.7 kΩ | ||
| Input filter time | 0 ms (default), 0.1 ms, 1 ms, 5 ms, 10 ms, 20 ms | ||
|
Output
Specifications |
Rated load voltage | 10.8 to 26.4 VDC (SELV and LIM power supplies, or UL 1310 Class 2 power supplies) *1 | |
|
Maximum output load
current |
0.2 A per 1 port, 2.5 A per 16 port | ||
|
Overcurrent protection
current |
Current limiting (0.5 A) by Overcurrent protection function | ||
|
OFF output leakage
current |
PNP: 0.1 mA or less NPN: 0.2 mA or less | ||
| Residual Voltage | PNP: 1.8 V or less, NPN: 1.6 V or less | ||
| Output response time | 0.1 ms or less | ||
| Environmental resistance |
Operating/
Storage temperature |
Operating: 0 to 55°C
Storage: -25 to +75°C (no freezing or condensation) |
|
|
Operating/
Storage humidity |
Operating/Storage: 5 to 95% RH
(no condensation) |
||
| Vibration resistance | IEC 61131-2 compliant
Vibration frequency: 5 to 8.4 Hz, single amplitude: 3.5 mm Vibration frequency: 8.4 to 150 Hz, acceleration: 10 m/s2 (1.0 G) Number of sweeps: 10 times each in 3 directions along X, Y, and Z axes |
||
| Shock resistance | IEC 61131-2 compliant
Peak acceleration: 150 m/s2 (15 G), 3 times each in 3 directions along X, Y, and Z axes (total of 18 times) |
||
| Operating environment | No corrosive gas | ||
| Operating altitude | 0 to 2,000 m | ||
| Installation location | In door use | ||
| Degree of protection | IP20 | ||
| Overvoltage category | ǁ or less | ||
| Pollution degree | 2 or less | ||
| Equipment class | Class ǀ | ||
| Material | Case: PC, keys/DIN rail mounting hook: POM, terminal block: PA | ||
| Weight | Approx. 195 g (including terminal blocks, when not wired) | ||
| Included accessories | Instruction manual, compliance sheet, power terminal block, 2×RJ45 connector protective cap (attached to unit) | ||
| 3×device terminal block | --- | ||
*1. Use a Class 2 power supply or a power supply compliant with SELV (Safety Extra-Low Voltage) circuit and LIM (Limited Energy Circuit) circuit standards.
Field network communication specifications
CC-Link IE Field Communication Specifications
| Item | GD-ILM16[]-CLI |
|---|---|
| Host network communication protocol | CC-Link IE Field |
| Station type | Remote device station or Intelligent devices station |
| Transmission speed | 1 Gbps |
| Total cable extension | Between Field Network master station and this product: 100 m
Between this product (IO-Link master) and IO-Link devices: 20 m |
| Station number setting | 1 to 120 |
| Internal response time | 0.6 ms or less |
CC-Link IE TSN Communication Specifications
| Item | GD-ILM16[]-CLI |
|---|---|
| Host network communication protocol | CC-Link IE TSN |
| Station type | Remote station |
| Transmission speed | 1 Gbps or 100 Mbps *1 |
| Total cable extension | Between Field Network master station and this product: 100 m
Between this product (IO-Link master) and IO-Link devices: 20 m |
| Station number setting | 1 to 254 |
| Internal response time | 0.6 ms or less |
| Authentication Class | Class B or Class A (Switchable) |
*1. It is specified in the master setting value “M83.IE TSN Class Setting”. Additionally, 100 Mbps is supported only for Class A.
last update: March 9, 2026
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