.hide-partial { max-height: none; } .show-more { display: none; }

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.

All Results (58)

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Fuse Clips G4 FUSE SOCKET 100-PACK

G4 FUSE SOCKETS
Opto 22
1: €58.20
1In Stock

Mfr. Part No.
G4 FUSE SOCKETS

Mouser Part No
94-G4FUSESOCKETS

Opto 22

Fuse Clips G4 FUSE SOCKET 100-PACK

Learn More

Datasheet

1In Stock

€58.20

€54.93

€52.68

View

Min.: 1
Mult.: 1

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

G4STRAPB-BLACK
Opto 22
1: €90.85
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)

Learn More

Datasheet

1In Stock

€90.85

€90.44

€87.57

€84.99

View

Min.: 1
Mult.: 1

Fuse Clips G4 Fuse Retaining Clip 10 Pack

G4 FUSE CLIP
Opto 22
1: €24.03
1In Stock

Mfr. Part No.
G4 FUSE CLIP

Mouser Part No
94-G4FUSECLIP

Opto 22

Fuse Clips G4 Fuse Retaining Clip 10 Pack

Learn More

Datasheet

1In Stock

€24.03

€23.28

€22.37

€21.53

View

Min.: 1
Mult.: 1

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

G4OAC5A
Opto 22
1: €31.68
555In Stock Restricted Availability

Mfr. Part No.
G4OAC5A

Mouser Part No
94-G4OAC5A

Opto 22

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

Learn More

Datasheet

555In Stock

€31.68

€28.26

€27.54

€26.44

€24.45

Min.: 1
Mult.: 1

Restricted Availability

I/O Modules G4 DC Output 5-60 VDC, 24 VDC Logic

G4ODC24
Opto 22
1: €31.64
1,044In Stock Restricted Availability

Mfr. Part No.
G4ODC24

Mouser Part No
94-G4ODC24

Opto 22

I/O Modules G4 DC Output 5-60 VDC, 24 VDC Logic

Learn More

Datasheet

1,044In Stock

€31.64

€27.31

€26.67

€24.45

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC24
Opto 22
1: €32.31
102In Stock Restricted Availability

Mfr. Part No.
G4IDC24

Mouser Part No
94-G4IDC24

Opto 22

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

Learn More

Datasheet

102In Stock

€32.31

€29.60

€25.52

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5
Opto 22
1: €29.88
145In Stock Restricted Availability

Mfr. Part No.
G4IDC5

Mouser Part No
94-G4IDC5

Opto 22

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

Learn More

Datasheet

145In Stock

€29.88

€27.71

€26.94

€26.60

€25.77

Min.: 1
Mult.: 1

Restricted Availability

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

G4OAC5
Opto 22
1: €29.64
89In Stock Restricted Availability

Mfr. Part No.
G4OAC5

Mouser Part No
94-G4OAC5

Opto 22

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

Learn More

Datasheet

89In Stock

€29.64

€27.26

€26.60

€26.24

€24.45

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5
Opto 22
1: €31.64
350In Stock Restricted Availability

Mfr. Part No.
G4ODC5

Mouser Part No
94-G4ODC5

Opto 22

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

Learn More

Datasheet

350In Stock

€31.64

€28.17

€27.64

€26.43

View

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5R
Opto 22
1: €33.39
220In Stock Restricted Availability

Mfr. Part No.
G4ODC5R

Mouser Part No
94-G4ODC5R

Opto 22

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

Learn More

Datasheet

220In Stock

€33.39

€29.82

€28.95

€27.57

€25.52

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 16-channel I/O Module Rack

G4PB16
Opto 22
1: €176.42
10In Stock Restricted Availability

Mfr. Part No.
G4PB16

Mouser Part No
94-G4PB16

Opto 22

Modules Accessories G4 16-channel I/O Module Rack

Learn More

Datasheet

10In Stock

€176.42

€160.89

€159.20

€157.93

View

Min.: 1
Mult.: 1

Restricted Availability

Mounting Fixings G4 MODULE SOCKET 100-PACK

G4-MOD-SOCKETS
Opto 22
1: €52.80
2In Stock

Mfr. Part No.
G4-MOD-SOCKETS

Mouser Part No
94-G4-MOD-SOCKETS

Opto 22

Mounting Fixings G4 MODULE SOCKET 100-PACK

Learn More

Datasheet

2In Stock

€52.80

€52.55

€50.95

€49.43

View

Min.: 1
Mult.: 1

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

G4IAC5
Opto 22
1: €31.56
15In Stock Restricted Availability
29Expected 20/08/2026

Mfr. Part No.
G4IAC5

Mouser Part No
94-G4IAC5

Opto 22

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

Learn More

Datasheet

15In Stock

29Expected 20/08/2026

€31.56

€27.51

€27.08

€26.51

€23.48

Min.: 1
Mult.: 1

Restricted Availability

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

G4IAC5L
Opto 22
1: €31.61
1In Stock Restricted Availability

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

Learn More

Datasheet

1In Stock

€31.61

€27.98

€27.49

€26.95

€24.45

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5-SW
Opto 22
1: €60.89
6In Stock Restricted Availability

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

Learn More

Datasheet

6In Stock

€60.89

€55.52

€54.93

€54.80

€49.19

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5D
Opto 22
1: €30.30
15In Stock Restricted Availability

Mfr. Part No.
G4IDC5D

Mouser Part No
94-G4IDC5D

Opto 22

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

Learn More

Datasheet

15In Stock

€30.30

€27.42

€26.20

€24.45

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5K
Opto 22
1: €28.72
15In Stock Restricted Availability

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

Learn More

Datasheet

15In Stock

€28.72

€25.62

€25.61

€23.48

Min.: 1
Mult.: 1

Restricted Availability

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

G4OAC24
Opto 22
1: €33.46
14In Stock Restricted Availability

Mfr. Part No.
G4OAC24

Mouser Part No
94-G4OAC24

Opto 22

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

Learn More

Datasheet

14In Stock

€33.46

€28.77

€28.76

€24.45

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5R5
Opto 22
1: €46.01
19In Stock Restricted Availability
32Expected 20/08/2026

Mfr. Part No.
G4ODC5R5

Mouser Part No
94-G4ODC5R5

Opto 22

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

Learn More

Datasheet

19In Stock

32Expected 20/08/2026

€46.01

€43.65

€42.55

€41.95

€37.48

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 16-channel Mounting Rack with Header Connector

G4PB16H
Opto 22
1: €174.57
4In Stock Restricted Availability

Mfr. Part No.
G4PB16H

Mouser Part No
94-G4PB16H

Opto 22

Modules Accessories G4 16-channel Mounting Rack with Header Connector

Learn More

Datasheet

4In Stock

€174.57

€156.52

Min.: 1
Mult.: 1

Restricted Availability

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

G4PB16T
Opto 22
1: €190.48
4In Stock Restricted Availability

Mfr. Part No.
G4PB16T

Mouser Part No
94-G4PB16T

Opto 22

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

Learn More

Datasheet

4In Stock

€190.48

€173.63

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 Digital 4-Channel Mounting Rack

G4PB4
Opto 22
1: €73.11
14In Stock Restricted Availability

Mfr. Part No.
G4PB4

Mouser Part No
94-G4PB4

Opto 22

Modules Accessories G4 Digital 4-Channel Mounting Rack

Learn More

Datasheet

14In Stock

€73.11

€65.88

€64.97

€64.22

€58.14

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 4-channel Output Module Rack

G4PB4R
Opto 22
1: €69.37
8In Stock Restricted Availability

Mfr. Part No.
G4PB4R

Mouser Part No
94-G4PB4R

Opto 22

Modules Accessories G4 4-channel Output Module Rack

Learn More

Datasheet

8In Stock

€69.37

€64.08

€62.52

€57.02

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 8-channel I/O Module Rack

G4PB8
Opto 22
1: €95.35
1In Stock Restricted Availability

Mfr. Part No.
G4PB8

Mouser Part No
94-G4PB8

Opto 22

Modules Accessories G4 8-channel I/O Module Rack

Learn More

Datasheet

1In Stock

€95.35

€90.24

€90.20

€90.10

€85.53

Min.: 1
Mult.: 1

Restricted Availability

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

G4STRAPB
Opto 22
1: €107.05
6In 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)

Learn More

Datasheet

6In Stock

€107.05

€91.00

€90.64

€82.73

Min.: 1
Mult.: 1

G4 I/O Family

All Results (58)

Customer Service Office

Company

Resources

Support

G4 I/O Family

All Results (58)

Industrial Automation

Embedded Solutions

Circuit Protection

Electromechanical

Power