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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.

All Results (58)

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Part #

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

G4STRAPB-BLACK
Opto 22
1: £79.31
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

£79.31

£78.95

£76.45

£74.20

View

Min.: 1
Mult.: 1

Fuse Clips G4 Fuse Retaining Clip 10 Pack

G4 FUSE CLIP
Opto 22
1: £20.98
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

£20.98

£20.32

£19.53

£18.80

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Min.: 1
Mult.: 1

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

G4OAC5A
Opto 22
1: £26.47
558In 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

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Datasheet

558In Stock

£26.47

£24.23

£23.75

£23.51

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC24
Opto 22
1: £28.21
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

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Datasheet

102In Stock

£28.21

£25.84

£22.28

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5
Opto 22
1: £26.09
175In 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

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Datasheet

175In Stock

£26.09

£24.19

£23.52

£23.22

£22.50

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5D
Opto 22
1: £26.03
125In 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

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Datasheet

125In Stock

£26.03

£23.71

£22.62

£21.34

£21.28

Min.: 1
Mult.: 1

Restricted Availability

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

G4OAC24A
Opto 22
1: £26.90
119In Stock Restricted Availability

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

£26.90

£23.51

£22.78

£21.96

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5
Opto 22
1: £27.19
182In Stock Restricted Availability
324Expected 16/07/2026

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 16/07/2026

£27.19

£24.26

£23.84

£22.76

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Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5R
Opto 22
1: £28.15
241In 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

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Datasheet

241In Stock

£28.15

£25.54

£24.74

£24.16

£22.28

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 Digital 4-Channel Mounting Rack

G4PB4
Opto 22
1: £62.02
20In Stock Restricted Availability

Mfr. Part No.
G4PB4

Mouser Part No
94-G4PB4

Opto 22

Modules Accessories G4 Digital 4-Channel Mounting Rack

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Datasheet

20In Stock

£62.02

£57.51

£57.46

£50.76

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 16-channel I/O Module Rack

G4PB16
Opto 22
1: £152.97
10In Stock Restricted Availability

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

£152.97

£140.46

£138.28

£137.33

View

Min.: 1
Mult.: 1

Restricted Availability

Mounting Fixings G4 MODULE SOCKET 100-PACK

G4-MOD-SOCKETS
Opto 22
1: £46.09
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

£46.09

£44.77

£43.75

£42.85

View

Min.: 1
Mult.: 1

Fuse Clips G4 FUSE SOCKET 100-PACK

G4 FUSE SOCKETS
Opto 22
1: £50.81
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

£50.81

£49.31

£46.74

£43.19

View

Min.: 1
Mult.: 1

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

G4IAC5L
Opto 22
1: £27.60
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

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Datasheet

1In Stock

£27.60

£24.43

£24.00

£23.53

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4IDC5-SW
Opto 22
1: £53.16
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

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Datasheet

6In Stock

£53.16

£48.47

£47.95

£47.84

£42.94

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: £25.07
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

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Datasheet

15In Stock

£25.07

£22.37

£22.36

£20.50

Min.: 1
Mult.: 1

Restricted Availability

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

G4OAC24
Opto 22
1: £29.09
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

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Datasheet

14In Stock

£29.09

£25.12

£25.11

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4OAC5
Opto 22
1: £25.88
38In Stock Restricted Availability
45Expected 13/07/2026

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 13/07/2026

£25.88

£23.80

£23.22

£22.91

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC24
Opto 22
1: £26.61
130In Stock Restricted Availability
537On Order

Mfr. Part No.
G4ODC24

Mouser Part No
94-G4ODC24

Opto 22

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

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Datasheet

130In Stock

537On Order

£26.61

£23.46

£23.20

£23.19

£21.34

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5A
Opto 22
1: £31.79
8In Stock Restricted Availability

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

£31.79

£27.02

£23.42

Min.: 1
Mult.: 1

Restricted Availability

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

G4ODC5R5
Opto 22
1: £41.21
27In Stock Restricted Availability

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

£41.21

£37.89

£37.02

£36.53

£32.72

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 16-channel Mounting Rack with Header Connector

G4PB16H
Opto 22
1: £149.54
1In Stock Restricted Availability
3Expected 07/07/2026

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

3Expected 07/07/2026

£149.54

£136.64

Min.: 1
Mult.: 1

Restricted Availability

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

G4PB16T
Opto 22
1: £166.29
2In Stock Restricted Availability
2Expected 16/07/2026

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 16/07/2026

£166.29

£151.58

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 4-channel Output Module Rack

G4PB4R
Opto 22
1: £60.56
8In Stock Restricted Availability

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

£60.56

£55.94

£54.58

£49.78

Min.: 1
Mult.: 1

Restricted Availability

Modules Accessories G4 8-channel I/O Module Rack

G4PB8
Opto 22
1: £83.24
1In Stock Restricted Availability

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

£83.24

£78.78

£78.74

£78.66

£74.67

Min.: 1
Mult.: 1

Restricted Availability

G4 I/O Family

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