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G4 I/O Family

Opto 22 G4 I/O Family offers I/O modules with an LED status indicator on the top of the module and a more compact footprint than the previous G1 I/O modules. The G4 product lineup includes not only discrete and analog I/O modules but also controllers, battery packs, fuse clips, tools, and accessories. The discrete I/O modules can switch up to 3A per channel, and each module is individually fused. The analog I/O modules provide complete electrical channel-to-channel isolation, which eliminates troublesome ground loop problems. The Opto 22 G4 products are guaranteed for life and are suitable for new installations, legacy Optomux and mistic systems, Raspberry Pi, and more.

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Part #

I/O Modules G4 AC Input 90-140 VAC/VDC, 24 VDC Logic

G4IAC24
Opto 22
1: Rp658.805
45In Stock

Mfr. Part No.
G4IAC24

Mouser Part No
94-G4IAC24

Opto 22

I/O Modules G4 AC Input 90-140 VAC/VDC, 24 VDC Logic

Datasheet

45In Stock

Rp658.805

Rp559.920

Rp559.553

Rp525.980

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Input 90-140 VAC/VDC, 5VDC Logic, with Manual/Auto Switch

G4IAC5MA
Opto 22
1: Rp1.189.738
8In Stock

Mfr. Part No.
G4IAC5MA

Mouser Part No
94-G4IAC5MA

Opto 22

I/O Modules G4 AC Input 90-140 VAC/VDC, 5VDC Logic, with Manual/Auto Switch

Datasheet

8In Stock

Rp1.189.738

Rp1.158.000

Rp1.142.956

Rp1.131.031

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 15 VDC Logic

G4OAC15
Opto 22
1: Rp658.621
10In Stock

Mfr. Part No.
G4OAC15

Mouser Part No
94-G4OAC15

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 15 VDC Logic

Datasheet

10In Stock

Rp658.621

Rp559.920

Rp475.895

Min.: 1
Mult.: 1

I/O Modules G4 AC Output, 24-280 VAC, 5 VDC Logic, Normally Closed

G4OAC5A5
Opto 22
1: Rp837.495
2In Stock

Mfr. Part No.
G4OAC5A5

Mouser Part No
94-G4OAC5A5

Opto 22

I/O Modules G4 AC Output, 24-280 VAC, 5 VDC Logic, Normally Closed

Datasheet

2In Stock

Rp837.495

Rp739.344

Rp730.538

Rp712.008

Rp628.534

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-60 VDC, 15 VDC Logic

G4ODC15
Opto 22
1: Rp690.543
1In Stock

Mfr. Part No.
G4ODC15

Mouser Part No
94-G4ODC15

Opto 22

I/O Modules G4 DC Output 5-60 VDC, 15 VDC Logic

Datasheet

1In Stock

Rp690.543

Rp586.889

Rp498.828

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-60 VDC, 5 VDC Logic with Manual/Auto Switch

G4ODC5MA
Opto 22
1: Rp1.168.090
4In Stock

Mfr. Part No.
G4ODC5MA

Mouser Part No
94-G4ODC5MA

Opto 22

I/O Modules G4 DC Output 5-60 VDC, 5 VDC Logic with Manual/Auto Switch

Datasheet

4In Stock

Rp1.168.090

Rp1.080.763

Rp1.034.898

Rp1.012.699

Rp918.768

Min.: 1
Mult.: 1

Mounting Fixings G4 PEM NUTS 100-PACK

G4-PEM-NUTS
Opto 22
1: Rp1.192.307
4In Stock

Mfr. Part No.
G4-PEM-NUTS

Mouser Part No
94-G4-PEM-NUTS

Opto 22

Mounting Fixings G4 PEM NUTS 100-PACK

Datasheet

4In Stock

Rp1.192.307

Rp1.115.070

Rp1.073.241

Rp1.034.531

View

Min.: 1
Mult.: 1

I/O Modules G4 AC OUTPUT 12-280 VAC, 24 VDC LOGIC WITH HOA/SW

G4OAC24AMA
Opto 22
1: Rp1.247.528
4In Stock

Mfr. Part No.
G4OAC24AMA

Mouser Part No
94-G4OAC24AMA

Opto 22

I/O Modules G4 AC OUTPUT 12-280 VAC, 24 VDC LOGIC WITH HOA/SW

Datasheet

4In Stock

Rp1.247.528

Rp1.101.861

Rp1.018.753

Rp996.922

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 24-280 VAC, 24 VDC Logic

G4OAC24A
Opto 22
1: Rp700.450
337On Order

Mfr. Part No.
G4OAC24A

Mouser Part No
94-G4OAC24A

Opto 22

I/O Modules G4 AC Output 24-280 VAC, 24 VDC Logic

Datasheet

337On Order

Rp700.450

Rp602.299

Rp577.532

Rp556.985

Rp521.577

Min.: 1
Mult.: 1

I/O Modules G4 AC Input 180-280 VAC/VDC, 5 VDC Logic

G4IAC5A
Opto 22
1: Rp722.099
13Expected 02/09/2026

Mfr. Part No.
G4IAC5A

Mouser Part No
94-G4IAC5A

Opto 22

I/O Modules G4 AC Input 180-280 VAC/VDC, 5 VDC Logic

Datasheet

13Expected 02/09/2026

Rp722.099

Rp613.674

Rp613.490

Rp521.577

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 4-16 VDC, 5VDC Logic High Speed

G4IDC5B
Opto 22
1: Rp656.603
10Expected 08/09/2026

Mfr. Part No.
G4IDC5B

Mouser Part No
94-G4IDC5B

Opto 22

I/O Modules G4 DC Input 4-16 VDC, 5VDC Logic High Speed

Datasheet

10Expected 08/09/2026

Rp656.603

Rp605.785

Rp585.054

Rp577.532

View

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-200 VDC, 5 VDC Logic

G4ODC5A
Opto 22
1: Rp776.770
8Expected 03/09/2026

Mfr. Part No.
G4ODC5A

Mouser Part No
94-G4ODC5A

Opto 22

I/O Modules G4 DC Output 5-200 VDC, 5 VDC Logic

Datasheet

8Expected 03/09/2026

Rp776.770

Rp660.273

Rp561.204

Min.: 1
Mult.: 1

Modules Accessories G4 24-channel I/O Module Rack

G4PB24
Opto 22
1: Rp4.222.882
3Expected 02/09/2026

Mfr. Part No.
G4PB24

Mouser Part No
94-G4PB24

Opto 22

Modules Accessories G4 24-channel I/O Module Rack

Datasheet

3Expected 02/09/2026

Rp4.222.882

Rp3.613.795

Rp3.613.612

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel I/O Module Rack Isolated Control

G4PB16I
Opto 22
1: Rp4.181.237
4On Order

Mfr. Part No.
G4PB16I

Mouser Part No
94-G4PB16I

Opto 22

Modules Accessories G4 16-channel I/O Module Rack Isolated Control

Datasheet

4On Order

Rp4.181.237

Rp3.901.093

Rp3.811.015

Rp3.783.312

View

Min.: 1
Mult.: 1

Battery Packs REPLACEMENT PART FOR G4 CONTROLLERS

G4BATT32
Opto 22
Shipping Restricted

Mfr. Part No.
G4BATT32

Mouser Part No
94-G4BATT32

Opto 22

Battery Packs REPLACEMENT PART FOR G4 CONTROLLERS

Datasheet

Shipping Restricted

I/O Modules G4 AC Input 190-280 VAC/VDC, 24 VDC Logic

G4IAC24A
Opto 22
1: Rp654.035
Non-Stocked Lead-Time 4 Weeks

Mfr. Part No.
G4IAC24A

Mouser Part No
94-G4IAC24A

Opto 22

I/O Modules G4 AC Input 190-280 VAC/VDC, 24 VDC Logic

Datasheet

Non-Stocked Lead-Time 4 Weeks

Rp654.035

Rp603.767

Rp575.514

Rp572.212

View

Min.: 1
Mult.: 1

I/O Modules G4 100 Ohm Platinum RTD Analog Input

G4AD10
Opto 22
1: Rp7.340.968
Non-Stocked

Mfr. Part No.
G4AD10

Mouser Part No
94-G4AD10

Opto 22

I/O Modules G4 100 Ohm Platinum RTD Analog Input

Datasheet

Non-Stocked

Rp7.340.968

Rp7.229.608

Rp7.149.987

Min.: 1
Mult.: 1

I/O Modules G4 4 to 20 mA Analog Input

G4AD3
Opto 22
1: Rp8.429.437
Non-Stocked

Mfr. Part No.
G4AD3

Mouser Part No
94-G4AD3

Opto 22

I/O Modules G4 4 to 20 mA Analog Input

Datasheet

Non-Stocked

Rp8.429.437

Min.: 1
Mult.: 1

I/O Modules G4 Type K Thermocouple Analog Input

G4AD8
Opto 22
1: Rp8.712.148
Non-Stocked

Mfr. Part No.
G4AD8

Mouser Part No
94-G4AD8

Opto 22

I/O Modules G4 Type K Thermocouple Analog Input

Datasheet

Non-Stocked

Rp8.712.148

Min.: 1
Mult.: 1

I/O Modules G4 4-20 mA Analog Output

G4DA3
Opto 22
1: Rp7.891.899
Non-Stocked

Mfr. Part No.
G4DA3

Mouser Part No
94-G4DA3

Opto 22

I/O Modules G4 4-20 mA Analog Output

Datasheet

Non-Stocked

Rp7.891.899

Rp7.747.699

Min.: 1
Mult.: 1

Ethernet Development Tools Ethernet I/O Upgrade for B4 Brain

G4EB2
Opto 22
1: Rp17.748.838
Non-Stocked

Mfr. Part No.
G4EB2

Mouser Part No
94-G4EB2

Opto 22

Ethernet Development Tools Ethernet I/O Upgrade for B4 Brain

Datasheet

Non-Stocked

Rp17.748.838

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic with Manual/Auto Switch

G4IDC5MA
Opto 22
1: Rp1.187.537
Non-Stocked

Mfr. Part No.
G4IDC5MA

Mouser Part No
94-G4IDC5MA

Opto 22

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic with Manual/Auto Switch

Datasheet

Non-Stocked

Rp1.187.537

Rp1.146.625

Rp1.121.491

Rp1.099.292

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 24-280 VAC, 15 VDC Logic

G4OAC15A
Opto 22
1: Rp677.151
Non-Stocked

Mfr. Part No.
G4OAC15A

Mouser Part No
94-G4OAC15A

Opto 22

I/O Modules G4 AC Output 24-280 VAC, 15 VDC Logic

Datasheet

Non-Stocked

Rp677.151

Rp650.182

Rp632.203

Rp617.159

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 24-280 VAC, 5 VDC Logic, with manual/auto switch

G4OAC5AMA
Opto 22
1: Rp1.161.118
Non-Stocked

Mfr. Part No.
G4OAC5AMA

Mouser Part No
94-G4OAC5AMA

Opto 22

I/O Modules G4 AC Output 24-280 VAC, 5 VDC Logic, with manual/auto switch

Datasheet

Non-Stocked

Rp1.161.118

Rp991.785

Rp962.798

View

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic with Manual/Auto Switch

G4OAC5MA
Opto 22
1: Rp1.200.012
Non-Stocked

Mfr. Part No.
G4OAC5MA

Mouser Part No
94-G4OAC5MA

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic with Manual/Auto Switch

Datasheet

Non-Stocked

Rp1.200.012

Rp1.080.763

Rp1.053.244

Rp1.031.779

Rp918.768

Min.: 1
Mult.: 1