Cutler-Hammer
8526A-6501
Cutler-Hammer 8526A-6501 DPDT Relay Output Module 5A 115/230VAC 30VDC 12VDC Coil
Only 1 left
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$20.89
PLC I/O Modules
710 listings · 584 in stock
We have 584 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 375 used, 136 open box, 64 new surplus and 9 refurbished. Prices start at $6.89 and go up to $3,919.89. Order by 3 PM CT on a business day (Mon to Fri) and it ships the same day from Princeton, TX, free shipping to all 50 US states. Our 30-day guarantee covers every item here.
Allen-Bradley
1771-ODC
Allen-Bradley 1771-ODC PLC-5 Isolated AC Output Module 6 Pt 120VAC 720VA Ser B
Only 2 left
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$34.89
Festo
1387359
Festo CTSL-D-16E-M12-5 1387359 Input Module 16 PNP IO-Link 24VDC M12 IP65/IP67
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$185.89
PLC
PLC I/O Module Pre-Wired Interconnect Cable Grey
PLC I/O Module Pre-Wired Interconnect Cable Grey Angled Multi-Pin Connectors
Only 4 left
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$48.89
Softrol
IDR-8G4
Softrol IDR-8G4 8 I/O Positions I/O Module Mounting Rack Board 16-Pin Header I2C
Only 1 left
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$28.89
Bailey
IMSED01
Bailey GM9008200151 IMSED01 Infi 90 Sequence of Events Digital Module 5VDC 2W
Only 4 left
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$670.89
Allen-Bradley
1734-IB8
Allen-Bradley 1734-IB8 POINT I/O 8 Digital Input Module 24VDC 5mA Sinking Ser D
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$23.89
Omron
CJ1
Omron CJ1 Series PLC I/O Module Unit Industrial Automation Controller Component
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$38.89
Modicon
AS-B882-239
Modicon AS-B882-239 High Speed Counter Module 2 Counters 0-30kHz 984 800-Series
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$38.89
Modicon
AS-B882-239
Modicon AS-B882-239 High Speed Counter I/O Module 2 Counters 0-32VDC 800 Series
Only 1 left
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$38.89
Foxboro
FBM224
Foxboro FBM224 P0926GG I/A Series 4-Channel Isolated RS-232/422/485 Comm Module
Only 4 left
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$146.89
Foxboro
P0926GG
Foxboro FBM224 P0926GG I/A Series 4 Channel Isolated RS-232/422/485 Comm Module
Only 2 left
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$3,227.89
Opto 22
005158G1
Opto 22 005158G1 G4 BASE 32-Point I/O Breakout Board 24VDC GND 4-Terminal Bus
Only 1 left
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$146.89
Opto 22
Opto 22 G4 16 channel Digital I/O Module Mountin
Opto 22 G4 16 channel Digital I/O Module Mounting Rack 50-pin Header Regulator
Only 3 left
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$116.89
Allen-Bradley
1771OQ16
Allen-Bradley 1771OQ16 PLC-5 Isolated DC Output Module 16 Pt 10-32VDC 2A Ser C
Only 1 left
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$126.89
Fanuc
A03B-0807-C104
Fanuc AID16D A03B-0807-C104 I/O Model A Input Module 24VDC 16PT POS/NEG Logic #D
In stock
Free shippingShips today by 3 PM CT
$11.89
Gould
AS-B882-239
Gould AS-B882-239 High Speed Counter Module 2x 0-30kHz 24-Point Terminal 984 PLC
Only 1 left
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$147.89
Sigmatek
01-007-324
Sigmatek TO 32F 01-007-324 Digital Output Module 32 Channel 37-Pin D-Sub HW V1.0
Only 1 left
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$260.89
Allen-Bradley
1771-OBD
Allen-Bradley 96211471 1771-OBD PLC-5 DC Output Module 16Pt 10-60VDC 2A 8A Ser C
In stock
Free shippingShips today by 3 PM CT
$33.89
Allen-Bradley
1746-OB16
Allen-Bradley 1746-OB16 SLC 500 Output Module 16Pt Sourcing 10-50VDC 0.5A Ser D
Only 2 left
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$9.89
Allen-Bradley
1756-IB32
Allen-Bradley 1756-IB32 ControlLogix 32-Point Input Module 12/24V Sinking Ser. B
Only 3 left
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$19.89
Allen-Bradley
1734D-IA16
Allen-Bradley 1734D-IA16 Ser A POINT I/O 16 Input 120VAC DeviceNet 24VDC 95mA
Only 1 left
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$23.89
ABB
ABB5624-12001
ABB ABB5624-12001 Miniature Edgewise Indicator -5 to +5 kPa Current Input Module
In stock
Free shippingShips today by 3 PM CT
$293.89
ABB
1KGT033300R0002
ABB 520BOD01 1KGT033300R0002 RTU520 Binary Output Module 8 Relay 150 VDC 8A 24V
Only 2 left
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$300.89
WAGO
753-431
WAGO 753-431 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$216.89
Siemens
6ES5470-4UB12
Siemens 6ES5470-4UB12 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$1,389.89
Allen-Bradley
1794-OW8
Allen-Bradley 1794-OW8 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$212.89
Allen-Bradley
1794-OB16
Allen-Bradley 1794-OB16 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$219.89
Keyence
KV-E16X
Keyence KV-E16X PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$383.89
PLC Direct
D4-16TR
PLC Direct D4-16TR PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$536.89
Allen-Bradley
1771-OFC
Allen-Bradley 1771-OFC PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$510.89
AEG
AS-BDAP-208
AEG AS-BDAP-208 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$1,480.89
Allen-Bradley
2706-NG1
Allen-Bradley 2706-NG1 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$65.89
Bailey
IMDSM04
Bailey IMDSM04 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$428.89
Allen-Bradley
1746-IA16
Allen-Bradley 1746-IA16 PLC Module, New
Available
Free shippingShips in 3 to 5 business days
$353.89
WAGO
750-502
WAGO 750-502 PLC I/O Module, New
Available
Free shippingShips in 3 to 5 business days
$216.89
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 and we reply within 1 hour during business hours (Mon to Fri 9 to 4:30 CT).
Coming soon in PLC I/O Modules: price being set
On our shelf, not priced yet. Open one to request a quote or get an email when it's priced.
Guides for PLC I/O Modules
- Legacy PLCsSLC 500 End of Life: Keep Running or Migrate?Where the SLC 500 stands, which spares keep one running, and how a phased move to CompactLogix keeps downtime short.
- Parts identificationHow to Read an Allen-Bradley Catalog Number & SeriesBulletin numbers, module codes, suffixes, the series letter and firmware revision, and how each one affects whether a replacement will work.
Troubleshooting guides
- TroubleshootingPLC I/O Module Fault or Not Responding: First ChecksModule status LEDs on ControlLogix, SLC 500, S7-300 and S7-1500 I/O, the Logix connection codes (16#0204, keying 16#0114/0116), power, slot, keying and field wiring checks.
- TroubleshootingPLC Won't Go to RUN? Allen-Bradley Mode and Fault ChecksKeyswitch and mode-switch positions, the faults that block RUN, firmware and project mismatches, missing or wrong I/O modules, forces, and the order to check them in.
- TroubleshootingControlLogix & CompactLogix Major Fault Codes ExplainedMajor fault types and codes (T01 power-up to T07 memory), where to read them in Studio 5000, minor vs major vs I/O faults, the first checks and clearing a fault safely.
- TroubleshootingSiemens S7-300/S7-400 SF & BF LEDs and Diagnostic BufferSF vs BF (and INTF, EXTF, BUSxF on the S7-400), steady vs flashing, reading the diagnostic buffer in STEP 7, and the first checks for modules, PROFIBUS, PROFINET and backup batteries.
PLC I/O Modules: common questions
Do you have PLC I/O Modules in stock?
Yes. 584 PLC I/O Modules listings are in stock right now, priced from $6.89 to $3,919.89. 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 96 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 to Fri): in-stock items ship the same day from Princeton, TX, with free shipping to all 50 US states.
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 to Fri 9 to 4:30 CT).