Omron C20K C28K C40K C60K

Here is a list of parts to purchase for your Omron K series PLC system. Production of the C20K, C28K, C40K, and C60K CPU Units was discontinued in March 2002. Once you find your part or suitable equivalent for your application, click on the link to see if that part is available.
Example – Relay outputs substituted for Triac outputs.
Omron C20K, C28K, C40K, C60K Troubleshooting

– C20K CPU Units
– C28K CPU Units
– C40K CPU Units
– C60K CPU Units
– C4K Expansion Units
– C16P Expansion Units
– C20P Expansion Units
– C28P Expansion Units
– C40P Expansion Units
– C60P Expansion Units
– Special Units – Timer, Analog, Host Link, Battery, Relay
– Software to program Omron C20K/C28K/C40K/C60K PLC
– Peripheral Devices – Hand Held Units for troubleshooting and programming
– Manuals

Omron C20K C28K C40K C60K CPU units

C20K – 12 inputs and 8 outputs

Name Power Supply Inputs Outputs Model Number
C20K 100 to 240 VAC 24 VDC, 12 pts Relay w/socket
8 pts		 C20K-CDR-A
C20K 100 to 240 VAC 24 VDC, 12 pts Transistor, 1A
8 pts		 C20K-CDT1-A
C20K 100 to 240 VAC 24 VDC, 12 pts Triac, 1A
8 pts		 C20K-CDS1-A
C20K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 10 pts Relay w/socket
8 pts		 C20K-CAR-A
C20K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 10 pts Triac, 1A
8 pts		 C20K-CAS1-A
C20K 24 VDC 24 VDC, 12 pts Relay w/socket
8 pts		 C20K-CDR-D
C20K 24 VDC 24 VDC, 12 pts Transistor, 1A
8 pts		 C20K-CDT1-D

C28K – 16 inputs and 12 outputs

Name Power Supply Inputs Outputs Model Number
C28K 100 to 240 VAC 24 VDC, 16 pts Relay w/socket
12 pts		 C28K-CDR-A
C28K 100 to 240 VAC 24 VDC, 16 pts Transistor, 1A
12 pts		 C28K-CDT1-A
C28K 100 to 240 VAC 24 VDC, 16 pts Triac, 1A
12 pts		 C28K-CDS1-A
C28K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 14 pts Relay w/socket
12 pts		 C28K-CAR-A
C28K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 10 pts Triac, 1A
12 pts		 C28K-CAS1-A
C28K 24 VDC 24 VDC, 16 pts Relay w/socket
12 pts		 C28K-CDR-D
C28K 24 VDC 24 VDC, 16 pts Transistor, 1A
12 pts		 C28K-CDT1-D

C40K – 24 inputs and 16 outputs

Name Power Supply Inputs Outputs Model Number
C40K 100 to 240 VAC 24 VDC, 24 pts Relay w/socket
16 pts		 C40K-CDR-A
C40K 100 to 240 VAC 24 VDC, 24 pts Transistor, 1A
16 pts		 C40K-CDT1-A
C40K 100 to 240 VAC 24 VDC, 24 pts Triac, 1A
16 pts		 C40K-CDS1-A
C40K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 22 pts Relay w/socket
16 pts		 C40K-CAR-A
C40K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 22 pts Triac, 1A
16 pts		 C40K-CAS1-A
C40K 24 VDC 24 VDC, 24 pts Relay w/socket
16 pts		 C40K-CDR-D
C40K 24 VDC 24 VDC, 24 pts Transistor, 1A
16 pts		 C40K-CDT1-D

C60K – 32 inputs and 28 outputs

Name Power Supply Inputs Outputs Model Number
C60K 100 to 240 VAC 24 VDC, 32 pts Relay w/socket
28 pts		 C60K-CDR-A
C60K 100 to 240 VAC 24 VDC, 32 pts Transistor, 1A
28 pts		 C60K-CDT1-A
C60K 100 to 240 VAC 24 VDC, 32 pts Triac, 1A
28 pts		 C60K-CDS1-A
C60K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 30 pts Relay w/socket
28 pts		 C60K-CAR-A
C60K 100 to 240 VAC 24 VDC, 2 pts 100 t0 120 VAC, 30 pts Triac, 1A
28 pts		 C60K-CAS1-A
C60K 24 VDC 24 VDC, 32 pts Relay w/socket
28 pts		 C60K-CDR-D
C60K 24 VDC 24 VDC, 32 pts Transistor, 1A
28 pts		 C60K-CDT1-D

I/O Units – Expansion Modules
C4K – 4 point input or output unit

Name Power Supply Inputs Outputs Model Number
C4K – 24 VDC, 4 pts – C4K-ID
C4K – 100 to 120 VAC, 4 pts – C4K-IA
C4K – – Relay w/socket
4 pts		 C4K-OR2
C4K – – Transistor, 1A
4 pts		 C4K-OT2
C4K – – Triac, 1A
4 pts		 C4K-OS2

C16P – 16 point input or output unit

Name Power Supply Inputs Outputs Model Number
C16P 100 to 240 VAC 24 VDC, 16 pts – C16P-ID-A
C16P 100 to 240 VAC – Relay w/socket
16 pts		 C16P-OR-A
C16P 100 to 240 VAC – Transistor, 1A
12 pts		 C16P-OT1-A
C16P 100 to 240 VAC – Triac, 1A
12 pts		 C16P-OS1-A
C16P – 24 VDC, 16 pts – C16P-ID
C16P – 100 to 120 VAC, 16 pts – C16P-IA
C16P 24 VDC – Relay w/socket
16 pts		 C16P-OR-D
C16P 24 VDC – Transistor, 1A
16 pts		 C16P-OT1-D

C20P – 12 point input and 8 output point expansion unit

Name Power Supply Inputs Outputs Model Number
C20P 100 to 240 VAC 24 VDC, 12 pts Relay w/socket
8 pts		 C20P-EDR-A
C20P 100 to 240 VAC 24 VDC, 12 pts Transistor, 1A
8 pts		 C20P-EDT1-A
C20P 100 to 240 VAC 24 VDC, 12 pts Triac, 1A
8 pts		 C20P-EDS1-A
C20P 100 to 240 VAC 100 to 120 VAC, 12 pts Relay w/socket
8 pts		 C20P-EAR-A
C20P 100 to 240 VAC 100 to 120 VAC, 12 pts Relay w/socket
8 pts		 C20P-EAS1-A
C20P 24 VDC 24 VDC, 12 pts Relay w/socket
8 pts		 C20P-EDR-D
C20P 24 VDC 24 VDC, 12 pts Transistor, 1A
8pts		 C20P-EDT1-D

C28P – 16 point input and 12 output point expansion unit

Name Power Supply Inputs Outputs Model Number
C28P 100 to 240 VAC 24 VDC, 16 pts Relay w/socket
12 pts		 C28P-EDR-A
C28P 100 to 240 VAC 24 VDC, 16 pts Transistor, 1A
12 pts		 C28P-EDT1-A
C28P 100 to 240 VAC 24 VDC, 16 pts Triac, 1A
12 pts		 C28P-EDS1-A
C28P 100 to 240 VAC 100 to 120 VAC, 16 pts Relay w/socket
12 pts		 C28P-EAR-A
C28P 100 to 240 VAC 100 to 120 VAC, 16 pts Relay w/socket
12 pts		 C28P-EAS1-A
C28P 24 VDC 24 VDC, 16 pts Relay w/socket
12 pts		 C28P-EDR-D
C28P 24 VDC 24 VDC, 16 pts Transistor, 1A
12 pts		 C28P-EDT1-D

C40P – 24 point input and 16 output point expansion unit

Name Power Supply Inputs Outputs Model Number
C40P 100 to 240 VAC 24 VDC, 24 pts Relay w/socket
16 pts		 C40P-EDR-A
C40P 100 to 240 VAC 24 VDC, 24 pts Transistor, 1A
16 pts		 C40P-EDT1-A
C40P 100 to 240 VAC 24 VDC, 24 pts Triac, 1A
16 pts		 C40P-EDS1-A
C40P 100 to 240 VAC 100 to 120 VAC, 24 pts Relay w/socket
16 pts		 C40P-EAR-A
C40P 100 to 240 VAC 100 to 120 VAC, 24 pts Relay w/socket
16 pts		 C40P-EAS1-A
C40P 24 VDC 24 VDC, 24 pts Relay w/socket
16 pts		 C40P-EDR-D
C40P 24 VDC 24 VDC, 24 pts Transistor, 1A
16 pts		 C40P-EDT1-D

C60P – 32 point input and 28 output point expansion unit

Name Power Supply Inputs Outputs Model Number
C60P 100 to 240 VAC 24 VDC, 32 pts Relay w/socket
28 pts		 C60P-EDR-A
C60P 100 to 240 VAC 24 VDC, 32 pts Transistor, 1A
28 pts		 C60P-EDT1-A
C60P 100 to 240 VAC 24 VDC, 32 pts Triac, 1A
28 pts		 C60P-EDS1-A
C60P 100 to 240 VAC 100 to 120 VAC, 32 pts Relay w/socket
28 pts		 C60P-EAR-A
C28P 100 to 240 VAC 100 to 120 VAC, 16 pts Relay w/socket
28 pts		 C60P-EAS1-A
C60P 24 VDC 24 VDC, 32 pts Relay w/socket
28 pts		 C60P-EDR-D
C60P 24 VDC 24 VDC, 16 pts Transistor, 1A
28 pts		 C60P-EDT1-D

Special Units

Name Specifications Model Number
Analog Timer Unit Settings: 0.1s to 10 min (one cable, C4K-CN501, included) C4K-TM
Analog Timer External Connector 2 m cable and connector C4K-CN223
Analog Input Unit 1 input; input ranges: 4 to 20 mA, 1 to 5 VDC C1K-AD
Analog Input Unit 4 input; input ranges: 4 to 20 mA, 1 to 5 VDC C4K-AD
Analog Output Unit 1 output; output ranges: 4 to 20 mA, 1 to 5 VDC C1K-DA
Host Link Unit RS232C (DB25) C20/C20K/C28K/C40K/C60K 3G2C7-LK201-EV1
Host Link Unit RS422 C20/C20K/C28K/C40K/C60K 3G2C7-LK202-EV1
Battery Set Built into CPU (same for all C-Series PLCs) 3G2A9-BAT08
Relay 24 VDC contact relay G6B-1174P-FD-US
Relay 24 VDC transistor relay G6SD-Z01P-PD-US
Relay 24 VDC triac relay G6S-201PL-PD-US

Software to program Omron C20K/C28K/C40K/C60K PLC
– Requires Host Link unit listed above

Name Specifications Model Number
LSS LSS 3.02 DOS Software for Omron PLCs LSS Download Link
LSS Technical Guide Ladder Support Software technical guide LSS Technical Guide Link
Syswin Syswin software will run on Windows XP or lower. Syswin 3.4

Peripheral Devices

Name Specifications Model Number
Programming Console Horizontal with Backlight 3G2A6-PRO15-E
Programming Console Hand-Held with Backlight. The programming console adapter AP003 and connecting cable CN222/CN422 are necessary. They are sold separately. C200H-PRO27-E
Programming Console Adapter Required to use Hand-Held Programming Console 3G2A5-AP003
Programming Console Connecting Cable Hand-Held Programming Console 2 m C200H-CN222
Programming Console Connecting Cable Hand-Held Programming Console 4 m C200H-CN422

Manuals
The following are the manuals for the ‘K’ series PLCs. You will note that the C20 manual is also listed. This is because the ‘K’ series could use the C20 expansion modules. The C20 was also referred to as a ‘Flatpack’ PLC.
Operation Manual – Sysmac C20K/C28K/C40K/C60K Programmable Controllers
https://www.lakewoodautomation.com/support/manuals/Omron/W146E15%20CxxK%20series%20operation%20manual.pdf
This manual will go through the instruction set as well as how to program the unit using the handheld unit. (3G2C7-PRO15-E)
Installation Guide – Sysmac C20K/C28K/C40K/C60K Programmable Controllers
https://www.lakewoodautomation.com/support/manuals/Omron/W147E31%20Cxxk%20Installation%20Manual.pdf
This manual will review the installation and troubleshooting techniques on this programmable controller.
C20 Programmable Controller – Sysmac C-Series – User’s Manual
http://www.edata.omron.com.au/eData/PLCs/Micros/W083-E1-5.pdf
This manual includes the installation, instruction set, and troubleshooting of the C20 PLC.
Omron C20K, C28K, C40K, C60K Troubleshooting