Call or text 469-316-8517Mon–Fri 9 AM–3:30 PM CT In stock – zero lead timeFree shipping (lower 48)
Menu

PLC I/O Modules

581 listings · 555 in stock

We have 555 listings in PLC I/O Modules in stock right now, and every one is photographed on our own shelves, so you see the exact unit you will receive. Top brands here include Allen-Bradley, Siemens and Reliance Electric.

More about PLC I/O Modules

By condition, the stock breaks down as 371 used, 109 open box, 66 new surplus and 9 refurbished. Prices start at $6.89 and go up to $3,599.89. Order by 3 PM CT on a business day (Mon–Fri) and it ships the same day from Princeton, TX – free shipping to the lower 48. Our 30-day guarantee covers every item here.

1–24 of 581 results

Filters
Modicon AS-B882-239 Speed Counter Module 2 Point PLC

Modicon

AS-B882-239

Modicon AS-B882-239 High Speed Counter Module 2 Point PLC AEG Gould Automation

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$767.89

Schneider Electric TSXDSY32T2K 32 Transistor Output Module

Schneider Electric

TSXDSY32T2K

Schneider Electric TSXDSY32T2K Modicon Premium 32 Transistor Output Module 24VDC

New – Open Box

Only 2 left

Free shippingShips today by 3 PM CT

$78.89

Allen-Bradley 1734-OB4E Point I/O Sourcing Output Module

Allen-Bradley

1734-OB4E

Allen-Bradley 1734-OB4E Ser C Point I/O 4-Channel 24VDC Sourcing Output Module

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$21.89

Allen-Bradley 1769-IF4 Analog Input Module PLC

Allen-Bradley

1769-IF4

Allen-Bradley 1769-IF4 Ser B Rev 2 Compact I/O 4-Channel Analog Input Module PLC

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$100.89

Beckhoff BK3120 12 MBaud PLC I/O Module

Beckhoff

BK3120

Beckhoff BK3120 PROFIBUS-DP Bus Coupler 24VDC 12 MBaud PLC I/O Module Industrial

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$81.89

GE Fanuc IC693MDL940L Series 90-30 Output Relay Module

GE Fanuc

IC693MDL940L

GE Fanuc IC693MDL940L Series 90-30 Output Relay Module 16 Point 2A Automation

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$155.89

GE Fanuc IC693MDL940L Series 90-30 Relay Output Module

GE Fanuc

IC693MDL940L

GE Fanuc IC693MDL940L Series 90-30 Relay Output Module 16 Point 2A PLC Control

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$155.89

Square D 8030 ROM-221 SY/MAX Series F2 Output Module

Square D

8030 ROM-221

Square D SY/MAX 8030 ROM-221 Series F2 Output Module 120VAC 30619-502-50 PLC I/O

Used

Only 1 left

Free shippingShips today by 3 PM CT

$14.89

Reliance Electric 57C410B Isolated Analog Output Module

Reliance Electric

57C410B

Reliance Electric 57C410B Isolated Analog Output Module 4-Channel 10VDC 57410-1

Used

Only 1 left

Free shippingShips today by 3 PM CT

$58.89

Allen-Bradley 1771-NIV Analog Input Module PLC-5

Allen-Bradley

1771-NIV

Allen-Bradley 1771-NIV Ser A High Resolution Isolated Analog Input Module PLC-5

Used

Only 1 left

Free shippingShips today by 3 PM CT

$168.89

Allen-Bradley 1746-OB16 SLC 500 DC Source Output Module

Allen-Bradley

1746-OB16

Allen-Bradley 1746-OB16 SLC 500 DC Source Output Module Ser D 16-Point PLC I/O

Used

Only 1 left

Free shippingShips today by 3 PM CT

$39.89

Allen-Bradley 1771-OAD/C AC Output Module

Allen-Bradley

1771-OAD/C

Allen-Bradley 1771-OAD/C AC Output Module 120VAC 50/60Hz 240VA Series C PLC-5

Used

Only 1 left

Free shippingShips today by 3 PM CT

$21.89

Square D 8030 ROM-221 SY/MAX Output Module

Square D

8030 ROM-221

Square D SY/MAX 8030 ROM-221 Output Module Series F1 120VAC 2A/Output 16A/Module

Used

Only 1 left

Free shippingShips today by 3 PM CT

$14.89

Festo 195742 195704 8 DI Digital Input Module

Festo

195742

Festo CPX-GE-EV 195742 CPX-AB-4-M12x2 195704 8 DI Digital Input Module Assembly

Used

Only 1 left

Free shippingShips today by 3 PM CT

$26.89

Cognex 800-5888-2 I/O Module Machine Vision Sensor

Cognex

800-5888-2

Cognex 800-5888-2 A Checker DIN Rail Mount PLC I/O Module Machine Vision Sensor

Used

Only 1 left

Free shippingShips today by 3 PM CT

$21.89

Allen-Bradley 1762-IQ16 Sink/Source Input Module

Allen-Bradley

1762-IQ16

Allen-Bradley 1762-IQ16 Ser A MicroLogix 16 Point 24VDC Sink/Source Input Module

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$72.89

Allen-Bradley 1794-OB16 Source Output Module PLC

Allen-Bradley

1794-OB16

Allen-Bradley 1794-OB16 Ser A Flex I/O 16-Point 24VDC Source Output Module PLC

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$26.89

Reliance Electric 45C69 Dual Dry Contact Output Module

Reliance Electric

45C69

Reliance Electric 45C69 AutoMate Dual Dry Contact Output Module 125VAC 57666-A

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$27.89

Horner HE693DAC420F Isolated Analog Output Module

Horner

HE693DAC420F

Horner HE693DAC420F Isolated Analog Output Module 4-Channel 4-20mA GE 90-30 PLC

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$475.89

Allen-Bradley 1734-EP24DC Point I/O Expansion Power Supply

Allen-Bradley

1734-EP24DC

Allen-Bradley 1734-EP24DC Ser B Point I/O Expansion Power Supply 24V w/ 1734-RTB

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$34.89

Allen-Bradley 1734D-IA16 DeviceNet 16 Point Input Module

Allen-Bradley

1734D-IA16

Allen-Bradley 1734D-IA16 Point Block DeviceNet 16 Point Input Module 120VAC PLC

New Surplus – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$38.89

Modicon AS-B882-239 Module 2 Point 984 Series PLC

Modicon

AS-B882-239

Modicon AEG AS-B882-239 High Speed Counter Module 2 Point 984 Series PLC Input

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$854.89

ABB 520BOD01 Binary Output Module

ABB

520BOD01

ABB 520BOD01 1KGT033300R0002 Binary Output Module RTU520 Industrial Automation

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$307.89

Numatics 240-211 G3 Series I/O Module

Numatics

240-211

Numatics 240-211 G3 Series I/O Module 8 In 8 Out PNP 24VDC Industrial Automation

New – Open Box

Only 1 left

Free shippingShips today by 3 PM CT

$284.89

Get a quote on PLC I/O Modules

Need more units than we list, a part you don't see here, or prices for a whole list? Send us the part numbers and quantities – we reply within 1 hour during business hours (Mon–Fri 9–3:30 CT).

Request a quote on PLC I/O Modules

PLC I/O Modules: common questions

Do you have PLC I/O Modules in stock?

Yes. 555 PLC I/O Modules listings are in stock right now, priced from $6.89 to $3,599.89. Every one is photographed, and all of them are listed on this page.

Which brands of PLC I/O Modules do you carry?

Mostly Allen-Bradley, Siemens and Reliance Electric, plus 79 more brands. The Brand filter on this page narrows the list to one maker.

Do in-stock items in PLC I/O Modules ship the same day?

Yes, when you order by 3 PM CT on a business day (Mon–Fri): in-stock items ship the same day from Princeton, TX, with free shipping to the lower 48.

Can I request a part you don't list in PLC I/O Modules?

Yes. Request a quote with the part number and we check our warehouse and our sourcing network. We answer within 1 hour during business hours (Mon–Fri 9–3:30 CT).