There are a different models of PLC-5, but what is the difference?
Well it is in its SRAM size. Basically, a memory area where the program resides.
For example PLC-5/20 means that it has a SRAM capacity of 16kb. You can verify the SRAM capacity by double clicking on the “Controller Properties” and selecting the “General” tab. See screen shot below.
The table below outlines the SRAM capacity of each of these PLC-5 processors SRAM size.
| Catalog | Series | Description | Battery | MSDS |
|---|---|---|---|---|
| 1785-LT | B | PLC-5/15 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LT2 | A | PLC-5/25 Processor Module 13Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LT3 | A | PLC-5/12 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LT4 | A | PLC-5/10 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LTR | B | Modified PLC-5/15 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LTR2 | A | Modified PLC-5/25 Processor Module 13Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LTR3 | A | Modified PLC-5/12 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1785-LTR4 | A | Modified PLC-5/10 Processor Module 6Kb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 5130-RM1 | A | Pyramid Integrator 128Kb Resource Manager Module |
1770-XY | Lithium Battery MSDS 1770 XY |
| 5130-RM2 | A | Pyramid Integrator 384Kb Resource Manager Module |
1770-XY | Lithium Battery MSDS 1770 XY |
| 5150-RS2 | A | Pyramid Integrator Remote Scanner Module |
1770-XY | Lithium Battery MSDS 1770 XY |
| 5150-RS5 | A | 5/250 Remote/Local Scanner | 1770-XY | Lithium Battery MSDS 1770 XY |
| 5250-LP1 | A, B | Pyramid Integrator Logic Processor Module | 1770-XY | Lithium Battery MSDS 1770 XY |
| 5250-LP2 | A, B | Pyramid Integrator Processor Module | 1770-XY | Lithium Battery MSDS 1770 XY |
| 5250-LP3 | A, B | Pyramid Integrator Logic Processor Module 1Mb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 5250-LP4 | A, B | Pyramid Integrator Logic Processor Module 2Mb Memory |
1770-XY | Lithium Battery MSDS 1770 XY |
| 1771-DMC | A | Control Coprocessor Main Module 256K |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1771-DMC1 | A | Control Coprocessor Main Module 1Mb Memory with EtherNet |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1771-DMC4 | A | Control Coprocessor Main Module 4Mb Memory with EtherNet |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L11B | A, C, D, E | PLC-5/11 Controller 8Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L20B | A, C, D, E | PLC-5/20 Controller 16Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L20BK | C, D | PLC-5/20 Controller 16Kb Word SRAM Conformal Coated |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L30B | A, C, D, E | PLC-5/30 Controller 32Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40B | A, B, C, D, E | PLC-5/40 Controller 48Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40BK | C, D | PLC-5/40 Controller 48Kb Word SRAM Conformal Coated |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40L | A, B, C, D, E | Extended Local PLC-5/40 Controller 48Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L60B | A, B, C, D, E | PLC-5/60 Controller 64Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L60L | A, B, C, D, E | Extended Local PLC-5/60 Controller 64Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L80B | C, D, E | PLC-5/80 Controller 100Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L80BK | C, D | PLC-5/80 Controller 100Kb Word SRAM Conformal Coated |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L16B | A, C | Protected PLC-5/11 Controller 8Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L26B | A, C, D, E | Protected PLC-5/20 Controller 16Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L36B | A, C | Protected PLC-5/30 Controller 32Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L46B | B, C, D, E | Protected PLC-5/40 Controller 48Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L46L | B, C, D, E | Protected Extended Local PLC-5/40 48Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L66B | B, C | Protected PLC-5/60 Controller 64Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L66L | B, C | Protected Extended Local PLC-5/60 64Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L86B | C, D, E | Protected PLC-5/80 Controller 100Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L20E | C, D, E | EtherNet PLC-5/20 Controller 16Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40E | C, D, E | EtherNet PLC-5/40 Controller 48Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L80E | C, D, E | EtherNet PLC-5/80 Controller 100Kb Word SRAM |
1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L20C | C, D, E | PLC-5/20C for ControlNet Phase 1.25 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40C | C, D, E | PLC-5/40C for ControlNet Phase 1.25 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L60C | D | PLC-5/60C for ControlNet Phase 1.25 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L80C | D, E | PLC-5/80C for ControlNet Phase 1.25 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L20C15 | C, D, E, F | PLC-5/20C for ControlNet Phase 1.5 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L40C15 | C, D, E, F | PLC-5/40C for ControlNet Phase 1.5 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L60C15 | D | PLC-5/60C for ControlNet Phase 1.5 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L80C15 | D, E, F | PLC-5/80C for ControlNet Phase 1.5 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-L46C15 | E, F | Protected PLC-5/40C for ControlNet Phase 1.5 | 1770-XYC/A | Lithium Battery MSDS 1770 XYC |
| 1785-V30B | C, D, E | VME PLC-5/30 Controller 32Kb Word SRAM |
1770-XYV/A | Lithium Battery MSDS 1770 XYV |
| 1785-V40B | C, D, E | VME PLC-5430 Controller 48Kb Word SRAM |
1770-XYV/A | Lithium Battery MSDS 1770 XYV |
| 1785-V40L | C, D, E | VME PLC-5/40 Controller with Extended Local Port | 1770-XYV/A | Lithium Battery MSDS 1770 XYV |
| 1785-V80B | C, D, E | VME PLC-5/80 Controller 100Kb Word SRAM |
1770-XYV/A | Lithium Battery MSDS 1770 XYV |
Reference