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Network Adapter, Light Version, Programmable Modbus/TCP



Programmable Specification, GL-9971 (Programmable Modbus/TCP Network Adapter)

Program MemoryMemory Area 1 : 256 KBytes
Contains: Code
Data MemoryMemory Area 0 : 40 KBytes
Contains: Data, Input, Output, Memory and Non-Retained Data

Memory: %MW0 ~ %MW4095 (4096 words)
I/O Input:%IW0 ~ %IW2047 (2048 words)
I/O Output: %QW0 ~ %QW2047 (2048 words)
Non-Volatile Memory4 KBytes
(Memory Area 2 - Retained : 2 KBytes)
(Memory Area 3 - Persistent Retained: 2 KBytes)
Run-Time System Multiple PLC Tasks
Program LanguagesIEC 61131-3 (LD, IL, ST, FBD, SFC)
OPC-Server DA
WebvisualizationNot supporting

Interface Specification, GL-9971 (Programmable Modbus/TCP Network Adapter)

Adapter TypeMaster & Slave Node (Modbus TCP, Modbus RTU)
Max. Expansion Module10 Slots
Max. Data Size(Input+Output)Max 128Byte each slot
Max. NodesLimited by Ethernet Specification
Baud rate 10/100Mbps, Auto-negotiation, Full Duplex
Ethernet InterfaceRJ-45 socket * 2pcs
Ethernet Protocol**Modbus/TCP, Modbus/UDP, SNTP
HTTP (Webvisualization***, Web-Server), DHCP/BOOTP, OPC-server
Max. Socket24 (UDP: 8, TCP: 16, TCP_LISTEN: 10)
Indicator6 LEDs
1 Green/Red, Module Status (MOD)
1 Green/Red, Network Status (NET)
1 Green/Red, PLC Run/Stop Status (RUN)
1 Green/Red, Expansion I/O Module Status (IOS)

General Specification

System PowerSupply voltage : 24Vdc nominal
Supply voltage range : 16~32Vdc
Protection : Output current limit (Min. 1.5A)
Reverse polarity protection
Power DissipationRefer to Network Adapter Manual
Current for I/O Module1.5A @ 5Vdc (When using in ‘60℃ ~ 70℃’ temperature environment,
the power dissipation is limited to 0.8A.)
IsolationSystem power to internal logic : Non-isolation
System power I/O driver : Isolation
Field PowerSupply voltage : 24Vdc typical (Max. 32Vdc)
* Field Power Range is different depending on IO Module series.
Refer to IO Module`s Specification.
Max. Current Field Power ContactDC 10A Max.
Module Size54mm x 99mm x 70mm


Codesys, Windows, 32 bitDownload
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Codesys, G-Series XMLDownload


Catalog - G-SeriesDownload
Manuals - Network AdaptersDownload
Manuals - Digital InputsDownload
Manuals - Digital OutputsDownload
Manuals - Analog InputsDownload
Manuals - Analog OutputsDownload
Manuals - Special ModulesDownload
Manuals - Power ModulesDownload
CAD Files
G-Series 2D Files (DWG)Download
G-Series 3D Files (STP)Download
IO Guide ProDownload
CSPP File: GL-9084Download
CSPP File: GN-9284Download
CSPP File: GN-9285Download
EDS File: GN-9289Download