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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.
Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Black (10-Pack) G4STRAPB-BLACK Opto 22 1: £118.40 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 about Opto 22 g4 io family	Datasheet	1In Stock	£118.40 £79.67 £77.17 £74.91 View £73.41 Quote	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 Learn More about Opto 22 g4 io family	Datasheet	1In Stock	£50.81 £47.95 £45.99 View Quote	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 Learn More about Opto 22 g4 io family	Datasheet	1In Stock	£20.98 £20.87 £19.12 £18.37 View £17.54 £17.12 Quote	Min.: 1 Mult.: 1
I/O Modules G4 DC Output 5-60 VDC, 24 VDC Logic G4ODC24 Opto 22 1: £28.02 770In 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 about Opto 22 g4 io family	Datasheet	770In Stock	£28.02 £24.97 £24.02 £23.24 View £21.34 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Output 5-60 VDC, 5 VDC Logic G4ODC5 Opto 22 1: £28.75 828In 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 about Opto 22 g4 io family	Datasheet	828In Stock	£28.75 £26.02 £25.07 £24.21 View £23.09 £22.81	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Input 10-32 VDC, 24 VDC Logic G4IDC24 Opto 22 1: £29.69 129In 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 about Opto 22 g4 io family	Datasheet	129In Stock	£29.69 £26.20 £25.85 £25.02 View £22.28 £22.23 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic G4IDC5 Opto 22 1: £27.45 108In 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 about Opto 22 g4 io family	Datasheet	108In Stock	£27.45 £25.03 £24.00 £23.34 View £22.70 £22.39 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 AC Output 24-280 VAC, 24 VDC Logic G4OAC24A Opto 22 1: £29.05 268In 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 Learn More about Opto 22 g4 io family	Datasheet	268In Stock	£29.05 £25.14 £24.00 £23.14 View £22.08 £21.81	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic G4OAC5 Opto 22 1: £27.94 61In 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 about Opto 22 g4 io family	Datasheet	61In Stock	£27.94 £24.86 £23.92 £23.14 View £21.34 £21.27 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 AC Output 24-280 VAC, 5 VDC Logic G4OAC5A Opto 22 1: £27.86 384In 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 about Opto 22 g4 io family	Datasheet	384In Stock	£27.86 £24.94 £24.30 £23.20 View £21.34 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 Reed Relay Output, 5 VDC logic, normally open G4ODC5R Opto 22 1: £29.41 202In 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 about Opto 22 g4 io family	Datasheet	202In Stock	£29.41 £26.01 £24.82 £24.02 £22.28	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 Reed Relay Output, 5 VDC logic, normally closed G4ODC5R5 Opto 22 1: £43.62 51In 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 Learn More about Opto 22 g4 io family	Datasheet	51In Stock	£43.62 £38.48 £38.10 £37.36 View £32.72 £32.71 Quote	Min.: 1 Mult.: 1 Restricted Availability
Modules Accessories G4 16-channel I/O Module Rack G4PB16 Opto 22 1: £157.30 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 about Opto 22 g4 io family	Datasheet	10In Stock	£157.30 £140.46 £138.68 £137.37 View Quote	Min.: 1 Mult.: 1 Restricted Availability
Mounting Fixings G4 MODULE SOCKET 100-PACK G4-MOD-SOCKETS Opto 22 1: £48.79 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 about Opto 22 g4 io family	Datasheet	2In Stock	£48.79 £45.82 £43.93 £42.64 View £41.32 £39.91 Quote	Min.: 1 Mult.: 1
I/O Modules G4 AC Input 90-140 VAC/VDC, 5 VDC Logic G4IAC5 Opto 22 1: £27.70 28In Stock Restricted Availability	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 about Opto 22 g4 io family	Datasheet	28In Stock	£27.70 £24.85 £23.96 £23.30 View £21.68 £21.21	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 AC Input 180-280 VAC/VDC, 5 VDC Logic G4IAC5A Opto 22 1: £29.55 13In Stock Restricted Availability	Mfr. Part No. G4IAC5A Mouser Part No 94-G4IAC5A	Opto 22	I/O Modules G4 AC Input 180-280 VAC/VDC, 5 VDC Logic Learn More about Opto 22 g4 io family	Datasheet	13In Stock	£29.55 £25.12 £25.02 £21.34	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: £29.49 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 about Opto 22 g4 io family	Datasheet	1In Stock	£29.49 £24.97 £24.20 £23.55 View £21.34 £21.27 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Input - DC voltage, self-powered, normally open G4IDC5-SW Opto 22 1: £54.83 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 about Opto 22 g4 io family	Datasheet	6In Stock	£54.83 £49.39 £47.17 £46.04 £42.94	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Input 4-16 VDC, 5VDC Logic High Speed G4IDC5B Opto 22 1: £27.14 10In Stock Restricted Availability	Mfr. Part No. G4IDC5B Mouser Part No 94-G4IDC5B	Opto 22	I/O Modules G4 DC Input 4-16 VDC, 5VDC Logic High Speed Learn More about Opto 22 g4 io family	Datasheet	10In Stock	£27.14 £24.79 £23.75 £22.72 View £22.31 £21.66 Quote	Min.: 1 Mult.: 1 Restricted Availability
I/O Modules G4 DC Input 2.5-28 VDC, 5 VDC Logic G4IDC5D Opto 22 1: £27.69 12In 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 about Opto 22 g4 io family	Datasheet	12In Stock	£27.69 £25.23 £24.52 £23.83 View £22.72 £21.83	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: £26.31 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 about Opto 22 g4 io family	Datasheet	15In Stock	£26.31 £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: £28.85 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 about Opto 22 g4 io family	Datasheet	14In Stock	£28.85 £25.02 £24.37 £21.34 £21.27	Min.: 1 Mult.: 1 Restricted Availability
Modules Accessories G4 16-channel Mounting Rack with Header Connector G4PB16H Opto 22 1: £156.13 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 about Opto 22 g4 io family	Datasheet	4In Stock	£156.13 £136.64	Min.: 1 Mult.: 1 Restricted Availability
Modules Accessories G4 16-channel I/O Module Rack Isolated Control G4PB16I Opto 22 1: £177.64 4In Stock Restricted Availability	Mfr. Part No. G4PB16I Mouser Part No 94-G4PB16I	Opto 22	Modules Accessories G4 16-channel I/O Module Rack Isolated Control Learn More about Opto 22 g4 io family	Datasheet	4In Stock	£177.64 £157.45 £157.25	Min.: 1 Mult.: 1 Restricted Availability
Modules Accessories G4 16-channel I/O Module Rack with Terminal Strip G4PB16T Opto 22 1: £175.84 1In Stock Restricted Availability 10Expected 05/10/2026	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 about Opto 22 g4 io family	Datasheet	1In Stock 10Expected 05/10/2026	£175.84 £162.24 £157.78 £155.97 View Quote	Min.: 1 Mult.: 1 Restricted Availability

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