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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 #

Fuse Clips G4 Fuse Retaining Clip 10 Pack

G4 FUSE CLIP
Opto 22
1: Rp512.587
1In Stock

Mfr. Part No.
G4 FUSE CLIP

Mouser Part No
94-G4FUSECLIP

Opto 22

Fuse Clips G4 Fuse Retaining Clip 10 Pack

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Datasheet

1In Stock

Rp512.587

Rp496.626

Rp477.179

Rp459.384

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Min.: 1
Mult.: 1

I/O Modules G4 DC Input 10-32 VDC, 24 VDC Logic

G4IDC24
Opto 22
1: Rp689.259
102In Stock

Mfr. Part No.
G4IDC24

Mouser Part No
94-G4IDC24

Opto 22

I/O Modules G4 DC Input 10-32 VDC, 24 VDC Logic

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Datasheet

102In Stock

Rp689.259

Rp631.469

Rp544.326

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic

G4IDC5
Opto 22
1: Rp637.340
175In Stock

Mfr. Part No.
G4IDC5

Mouser Part No
94-G4IDC5

Opto 22

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic

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Datasheet

175In Stock

Rp637.340

Rp591.108

Rp574.597

Rp567.442

Rp549.646

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 2.5-28 VDC, 5 VDC Logic

G4IDC5D
Opto 22
1: Rp636.239
135In Stock

Mfr. Part No.
G4IDC5D

Mouser Part No
94-G4IDC5D

Opto 22

I/O Modules G4 DC Input 2.5-28 VDC, 5 VDC Logic

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Datasheet

135In Stock

Rp636.239

Rp579.367

Rp552.765

Rp521.577

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Min.: 1
Mult.: 1

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

G4OAC24A
Opto 22
1: Rp657.154
119In Stock

Mfr. Part No.
G4OAC24A

Mouser Part No
94-G4OAC24A

Opto 22

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

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Datasheet

119In Stock

Rp657.154

Rp574.413

Rp556.618

Rp536.804

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Min.: 1
Mult.: 1

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

G4OAC5A
Opto 22
1: Rp646.880
148In Stock
410Expected 29/06/2026

Mfr. Part No.
G4OAC5A

Mouser Part No
94-G4OAC5A

Opto 22

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

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Datasheet

148In Stock

410Expected 29/06/2026

Rp646.880

Rp592.025

Rp580.284

Rp574.413

Rp521.577

Min.: 1
Mult.: 1

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

G4ODC5
Opto 22
1: Rp664.492
182In Stock
324Expected 09/07/2026

Mfr. Part No.
G4ODC5

Mouser Part No
94-G4ODC5

Opto 22

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

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Datasheet

182In Stock

324Expected 09/07/2026

Rp664.492

Rp592.759

Rp582.669

Rp556.067

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Min.: 1
Mult.: 1

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally open

G4ODC5R
Opto 22
1: Rp687.975
83In Stock
163Expected 09/07/2026

Mfr. Part No.
G4ODC5R

Mouser Part No
94-G4ODC5R

Opto 22

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally open

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Datasheet

83In Stock

163Expected 09/07/2026

Rp687.975

Rp624.131

Rp604.501

Rp590.191

Rp544.326

Min.: 1
Mult.: 1

Modules Accessories G4 Digital 4-Channel Mounting Rack

G4PB4
Opto 22
1: Rp1.515.563
24In Stock

Mfr. Part No.
G4PB4

Mouser Part No
94-G4PB4

Opto 22

Modules Accessories G4 Digital 4-Channel Mounting Rack

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Datasheet

24In Stock

Rp1.515.563

Rp1.405.304

Rp1.404.203

Rp1.195.242

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel I/O Module Rack

G4PB16
Opto 22
1: Rp3.737.814
10In Stock

Mfr. Part No.
G4PB16

Mouser Part No
94-G4PB16

Opto 22

Modules Accessories G4 16-channel I/O Module Rack

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Datasheet

10In Stock

Rp3.737.814

Rp3.432.170

Rp3.379.150

Rp3.355.850

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Min.: 1
Mult.: 1

Mounting Fixings G4 MODULE SOCKET 100-PACK

G4-MOD-SOCKETS
Opto 22
1: Rp1.126.261
2In Stock

Mfr. Part No.
G4-MOD-SOCKETS

Mouser Part No
94-G4-MOD-SOCKETS

Opto 22

Mounting Fixings G4 MODULE SOCKET 100-PACK

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Datasheet

2In Stock

Rp1.126.261

Rp1.093.972

Rp1.069.205

Rp1.047.006

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Min.: 1
Mult.: 1

Fuse Clips G4 FUSE SOCKET 100-PACK

G4 FUSE SOCKETS
Opto 22
1: Rp1.126.261
1In Stock

Mfr. Part No.
G4 FUSE SOCKETS

Mouser Part No
94-G4FUSESOCKETS

Opto 22

Fuse Clips G4 FUSE SOCKET 100-PACK

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Datasheet

1In Stock

Rp1.126.261

Rp1.113.419

Rp1.026.459

Rp993.069

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Min.: 1
Mult.: 1

I/O Modules G4 AC Input 90-140 VAC/VDC, 5 VDC Logic, Low Impedance

G4IAC5L
Opto 22
1: Rp674.399
1In Stock

Mfr. Part No.
G4IAC5L

Mouser Part No
94-G4IAC5L

Opto 22

I/O Modules G4 AC Input 90-140 VAC/VDC, 5 VDC Logic, Low Impedance

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Datasheet

1In Stock

Rp674.399

Rp596.795

Rp586.522

Rp574.964

Rp521.577

Min.: 1
Mult.: 1

I/O Modules G4 DC Input - DC voltage, self-powered, normally open

G4IDC5-SW
Opto 22
1: Rp1.298.897
6In Stock

Mfr. Part No.
G4IDC5-SW

Mouser Part No
94-G4IDC5-SW

Opto 22

I/O Modules G4 DC Input - DC voltage, self-powered, normally open

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Datasheet

6In Stock

Rp1.298.897

Rp1.184.418

Rp1.171.759

Rp1.169.007

Rp1.025.908

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 2.5-16 VDC, 5 VDC Logic, Very High Speed

G4IDC5K
Opto 22
1: Rp612.756
15In Stock

Mfr. Part No.
G4IDC5K

Mouser Part No
94-G4IDC5K

Opto 22

I/O Modules G4 DC Input 2.5-16 VDC, 5 VDC Logic, Very High Speed

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Datasheet

15In Stock

Rp612.756

Rp546.527

Rp546.344

Rp469.841

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 24 VDC Logic

G4OAC24
Opto 22
1: Rp710.724
14In Stock

Mfr. Part No.
G4OAC24

Mouser Part No
94-G4OAC24

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 24 VDC Logic

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Datasheet

14In Stock

Rp710.724

Rp613.674

Rp613.490

Rp521.577

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic

G4OAC5
Opto 22
1: Rp632.387
38In Stock
45Expected 29/06/2026

Mfr. Part No.
G4OAC5

Mouser Part No
94-G4OAC5

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic

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Datasheet

38In Stock

45Expected 29/06/2026

Rp632.387

Rp581.568

Rp567.442

Rp559.736

Rp521.577

Min.: 1
Mult.: 1

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

G4ODC5A
Opto 22
1: Rp776.770
8In Stock

Mfr. Part No.
G4ODC5A

Mouser Part No
94-G4ODC5A

Opto 22

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

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Datasheet

8In Stock

Rp776.770

Rp660.273

Rp561.204

Min.: 1
Mult.: 1

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally closed

G4ODC5R5
Opto 22
1: Rp1.006.828
27In Stock

Mfr. Part No.
G4ODC5R5

Mouser Part No
94-G4ODC5R5

Opto 22

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally closed

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Datasheet

27In Stock

Rp1.006.828

Rp925.739

Rp904.458

Rp892.533

Rp799.519

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel Mounting Rack with Header Connector

G4PB16H
Opto 22
1: Rp3.654.156
1In Stock

Mfr. Part No.
G4PB16H

Mouser Part No
94-G4PB16H

Opto 22

Modules Accessories G4 16-channel Mounting Rack with Header Connector

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Datasheet

1In Stock

Rp3.654.156

Rp3.318.241

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel I/O Module Rack with Terminal Strip

G4PB16T
Opto 22
1: Rp4.063.456
2In Stock
2Expected 09/07/2026

Mfr. Part No.
G4PB16T

Mouser Part No
94-G4PB16T

Opto 22

Modules Accessories G4 16-channel I/O Module Rack with Terminal Strip

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Datasheet

2In Stock

2Expected 09/07/2026

Rp4.063.456

Rp3.704.057

Min.: 1
Mult.: 1

Modules Accessories G4 4-channel Output Module Rack

G4PB4R
Opto 22
1: Rp1.479.788
8In Stock

Mfr. Part No.
G4PB4R

Mouser Part No
94-G4PB4R

Opto 22

Modules Accessories G4 4-channel Output Module Rack

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Datasheet

8In Stock

Rp1.479.788

Rp1.366.960

Rp1.333.754

Rp1.174.327

Min.: 1
Mult.: 1

Modules Accessories G4 8-channel I/O Module Rack

G4PB8
Opto 22
1: Rp2.034.021
1In Stock

Mfr. Part No.
G4PB8

Mouser Part No
94-G4PB8

Opto 22

Modules Accessories G4 8-channel I/O Module Rack

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Datasheet

1In Stock

Rp2.034.021

Rp1.925.046

Rp1.924.128

Rp1.922.110

Rp1.754.245

Min.: 1
Mult.: 1

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Red (10-Pack)

G4STRAPB
Opto 22
1: Rp2.283.710
7In Stock

Mfr. Part No.
G4STRAPB

Mouser Part No
94-G4STRAPB

Opto 22

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Red (10-Pack)

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Datasheet

7In Stock

Rp2.283.710

Rp1.941.190

Rp1.932.384

Rp1.697.005

Min.: 1
Mult.: 1

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Black (10-Pack)

G4STRAPB-BLACK
Opto 22
1: Rp1.938.071
1In Stock

Mfr. Part No.
G4STRAPB-BLACK

Mouser Part No
94-G4STRAPB-BLACK

Opto 22

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Black (10-Pack)

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Datasheet

1In Stock

Rp1.938.071

Rp1.929.265

Rp1.868.173

Rp1.812.952

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Min.: 1
Mult.: 1

G4 I/O Family

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