Omron CJ1M-CPU12 — 10K-Step CPU, 320 I/O, No Built-in I/O
SKU: CJ1M-CPU12USD 135.00
CJ1M-series CPU with 10K-step program, 32K-word data, 320 I/O on a 10-slot CPU rack, RS-232C + peripheral port.
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Product Overview
The Omron CJ1M-CPU12 is the no-built-in-I/O head of the CJ1M-CPU1[] family -- a 90 H x 31 W x 65 D mm modular CPU for the CJ-series rack with 10K-step program capacity, 32K-word data area, 0.1 us basic-instruction execution time, and a 320 I/O / 10-slot CPU rack limit. The CJ1M-CPU12 has no Ethernet port (pick the CJ1M-CPU12-ETN for built-in 100Base-TX) and no built-in I/O (pick the CJ1M-CPU22 for 10 inputs / 6 outputs + 2 high-speed counters + 2 pulse outputs at 100 kHz). The CJ1M series is discontinued as of March 2021 per the Omron catalog.
Where the CJ1M-CPU12 fits
Pick the CJ1M-CPU12 for a small modular machine with 320 or fewer I/O points, no expansion rack, and a single RS-232C port for an NB-series HMI or Host Link polling. The 10K step program covers the typical multi-page machine program; the 32K-word data memory holds the recipe and alarm buffers for a small packaging or filling line. The 0.1 us basic instruction handles 4-axis stepper / pulse control through a CJ1W-NC position control unit when needed. Pick the CJ1M-CPU13 instead for 640 I/O and one expansion rack; pick the CJ1M-CPU22 instead for built-in I/O and 100 kHz pulse output.
Serial and memory options
The CJ1M-CPU12 has a built-in RS-232C port and a built-in peripheral port. The RS-232C port supports Host Link, NT Link, no-protocol, and CompoWay/F Serial Gateway. The peripheral port supports CX-Programmer upload and a Programming Console. Add a CJ1W-SCU21-V1 / SCU41-V1 for two more serial ports (RS-232C + RS-422/485 each) with protocol macro support. Add a CJ1W-CIF11 RS-422A adapter for RS-422 peripheral port. The optional CJ1W-BAT01 battery is required for retained memory and the real-time clock.
Before ordering
Confirm the cabinet can accept the discontinued (March 2021) CJ1M line and that like-for-like spare stock is available. Confirm the supply is a CJ1W-PA202 / PA205R (AC) or CJ1W-PD022 / PD025 (DC) on the leftmost slot. Confirm the CX-Programmer version is 9.6 or later. For new builds, pick the CP2E (slim 24 VDC) or NX102 (EtherCAT) instead -- the CJ1M line is a like-for-like spare, not a new platform.
Key Features
- CJ1M-series CPU unit (CJ1M-CPU1[] head, no built-in I/O)
- 10K-step program capacity, 32K-word data area (DM 32K words, EM none)
- 320 I/O points max, 10 mountable Units on the CPU rack (no expansion rack on CPU11/12/21/22)
- Basic instruction 0.10 us / special instruction 0.15 us, overhead 0.5 ms min
- Built-in RS-232C port (Host Link / NT Link / no-protocol / CompoWay/F Serial Gateway)
- Built-in peripheral port for CX-Programmer upload and Programming Console
- Compact flash memory card slot for user program backup, autoboot, and program replacement during run
- CJ1W-BAT01 battery (sold separately) for retained memory and real-time clock
- 288 tasks (32 cyclic + 256 interrupt), approx 400 instructions (3-digit function codes)
- Programming: CX-Programmer 9.6 or later (ladder / SFC / ST / function blocks)
- DIN Track mount, 90 H x 31 W x 65 D mm, 130 g or less
- Discontinued March 2021 (per Omron catalog header) -- pick like-for-like spare stock
- SKU: CJ1M-CPU12
- Series: CJ-series CJ1M CPU Units
- I/O: 320 I/O
Best-Fit Applications
- Small modular machine with 320 or fewer I/O points on a 10-slot CJ-series rack
- Packaging line with one CJ-series HMI on the built-in RS-232C port and one peripheral Programming Console
- Filling line with a CJ1W-BAT01 battery for retained recipes and the built-in RTC
- Existing CJ1M control panel where the like-for-like spare CPU is the CJ1M-CPU12
- OEM skid that needs a compact 31 mm wide modular CPU with RS-232C + CX-Programmer upload
Buying Checklist
- Pick CJ1M-CPU12 for a 10K-step / 320 I/O modular CPU with RS-232C and no built-in I/O.
- Pick CJ1M-CPU13 instead when 640 I/O and one expansion rack are needed.
- Pick CJ1M-CPU12-ETN instead when built-in 100Base-TX Ethernet for SCADA / NB-HMI is required.
- Pick CJ1M-CPU22 instead when 10 built-in inputs / 6 outputs + 100 kHz 2-axis pulse output are needed.
- Pick CP2E-N40DT-D instead for a new build (the CJ1M line is discontinued March 2021).
- Add the CJ1W-BAT01 battery for retained memory + RTC, and a CJ1W-SCU21-V1 / SCU41-V1 for two extra serial ports.
Technical Specifications
| Series | CJ-series CJ1M CPU Units |
|---|---|
| Model | CJ1M-CPU12 (CJ1M-CPU1[] head, no built-in I/O) |
| Program Capacity | 10K steps |
| Data Memory | 32K words (DM 32K words, EM none) |
| Max I/O Points | 320 I/O points on the CPU rack |
| Mountable Units | 10 Units on the CPU rack (no expansion rack) |
| Execution Time | Basic 0.10 us min / Special 0.15 us min |
| Overhead | 0.5 ms min |
| Built-in I/O | None (use CJ1M-CPU22 for built-in I/O + pulse) |
| Serial Ports | Built-in RS-232C + built-in peripheral port |
| Battery | CJ1W-BAT01 (sold separately) for retained memory + RTC |
| Memory Card | Compact Flash card (MS-DOS format), user program + autoboot |
| Programming | CX-Programmer 9.6 or later (ladder / SFC / ST / function blocks) |
| Tasks | 288 (cyclic 32 + interrupt 256) |
| Approx Instructions | 400 (3-digit function codes) |
| Mount | DIN Track (screw mounting not possible) |
| Dimensions | 90 H x 31 W x 65 D mm |
| Weight | 130 g or less |
| Operating Temperature | 0 to 55 C |
| Approvals | UL 508 / CSA / cUL / CE / Lloyds / NK |
| Discontinued | March 2021 (per Omron catalog header) |
Resources & Downloads
FAQ for CJ1M-CPU12
Is the CJ1M-CPU12 still in production?
No. The CJ1M-CPU12 is part of the CJ1M-CPU1[] family which Omron discontinued in March 2021. The current pick for a new build is the CP2E (slim 24 VDC PLC) or the NX102 (EtherCAT controller). The CJ1M-CPU12 remains the right pick for a like-for-like spare on an existing CJ1M control panel; check with a stocking distributor for new-old-stock availability.
What is the difference between CJ1M-CPU11, CPU12, and CPU13?
All three are the no-built-in-I/O head of the CJ1M-CPU1[] family. The CPU11 has 5K steps and 160 I/O. The CPU12 has 10K steps and 320 I/O. The CPU13 has 20K steps, 640 I/O, and one expansion rack support. Pick the CPU11 for the smallest program and the smallest I/O; pick the CPU12 for the typical small machine; pick the CPU13 for the deeper machine with a second rack. The -ETN suffix on each adds built-in 100Base-TX Ethernet.
Can the CJ1M-CPU12 do pulse output?
Not by itself. The CJ1M-CPU12 is the no-built-in-I/O head -- it has no built-in pulse output. Pick the CJ1M-CPU22 instead for 100 kHz 2-axis pulse output plus 10 input / 6 output built-in I/O. For a pulse-output build on the CJ1M-CPU12, add a CJ1W-NC213 / NC233 / NC413 / NC433 position control unit on the CPU rack -- the CJ1M-CPU12 has the 0.1 us basic instruction time and the backplane bandwidth for a 4-axis pulse build via the NC units.
What power supply does the CJ1M-CPU12 need?
The CJ1M-CPU12 is the CPU head only -- the supply sits in the leftmost slot of the CPU rack. For an AC cabinet, pick the CJ1W-PA202 (14 W, 100-240 VAC free-voltage, 2.8 A at 5 VDC / 0.4 A at 24 VDC) or the CJ1W-PA205R (25 W, 100-240 VAC, 5 A at 5 VDC / 0.8 A at 24 VDC with a RUN contact). For a 24 VDC cabinet, pick the CJ1W-PD022 (4.6 A at 5 VDC) or the CJ1W-PD025 (6 A at 5 VDC). Match the supply to the total 5 VDC draw of the rack.
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