OMRON CJ1W/CS1W-V680C1x — RFID Systems
Omron CJ1W/CS1W-V680C1x: V680 ID Sensor Unit for CJ, CS and NJ PLCs; 1 or 2 antennas, 160 bytes per scan, transfer up to 2,048 bytes.
Status: In production
Brand: Omron
Product: RFID ID Sensor Unit for CJ/CS-series PLCs
PLC: CJ1W: CJ series (also NJ); CS1W: CS series
Antenna connections: V680C11: 1; V680C12: 2
Data transfer quantity: 2,048 bytes max. (160 bytes/scan)
Degree of protection: Mounted in panel (IP30)
The CJ1W-V680C11/C12 and CS1W-V680C11/C12 are Special I/O Units that connect the V680 RFID system to CJ- and CS-series PLCs; the CJ1W models are also used with NJ-series controllers. 1 antenna connects to the C11 models and 2 to the C12 models; antennas are connected through a V680-HA63A/B amplifier, and the V680-H01-V2 can be connected only to a 1-channel unit. The unit uses a special protocol for CS, CJ and NJ PLCs and transfers up to 2,048 bytes, 160 bytes per scan. C11 models allocate 10 words and C12 models 20 words.
Supported commands are read, write, bit set/bit clear, mask bit write, calculation write, data fill, data check, number-of-writes control, copy (C12 only), read/write with error correction, UID read and noise measurement. Single trigger, single auto, repeat auto, FIFO and multi-access options are available. The unit diagnoses CPU watchdog timer, tag communication errors and antenna power supply errors; tag communication can be tested in test mode, with status shown by LED indicators. Operating temperature is 0 to 55 °C and storage −20 to 75 °C.
Omron CJ1W/CS1W-V680C1x technical specifications
| General | |
|---|---|
| Type | CJ/CS Special I/O Unit (ID Sensor Unit) |
| Communications control protocol | Special protocol for CS, CJ and NJ PLCs |
| Connectable devices | V680-HA63A/B + V680-HS; V680-H01-V2 on 1-channel units only |
| Detection | |
| Data transfer quantity | 2,048 bytes max. (160 bytes/scan) |
| Communications options | Single trigger, single auto, repeat auto, FIFO trigger, FIFO repeat, multi-access trigger, multi-access repeat |
| Diagnostic function | CPU watchdog timer, communication error with RF tag, antenna power supply error |
| Electrical characteristics | |
| Current consumption, internal 5 V | C11: 260 mA; C12: 320 mA |
| Current consumption, internal 24 V/26 V | CJ1W-V680C11: 130 mA; CJ1W-V680C12: 260 mA; CS1W-V680C11: 125 mA (280 mA with V680-H01) |
| External power supply | CS1W-V680C12 only: 24 V DC, 360 mA |
| Dielectric strength | 1,000 V AC for 1 min |
| Environmental | |
| Ambient operating temperature | 0 to 55 °C |
| Ambient storage temperature | −20 to 75 °C |
| Ambient operating humidity | 10–90% (with no condensation) |
| Shock resistance | 147 m/s², 3 times each in X, Y and Z |
| Degree of protection | Mounted in panel (IP30) |
| Mechanical and connection | |
| Dimensions | CJ1W: 31 × 65 × 90 mm; CS1W: 35 × 130 × 101 mm (excluding protrusions) |
| Number of allocated words | C11: 10; C12: 20 |
Omron CJ1W/CS1W-V680C1x models
| Code | PLC series | Antennas | Dimensions | Allocated words |
|---|---|---|---|---|
| CJ1W-V680C11 | CJ | 1 | 31 × 65 × 90 mm | 10 |
| CJ1W-V680C12 | CJ | 2 | 31 × 65 × 90 mm | 20 |
| CS1W-V680C11 | CS | 1 | 35 × 130 × 101 mm | 10 |
| CS1W-V680C12 | CS | 2 | 35 × 130 × 101 mm | 20 |
Key features
- V680 RFID connection for CJ, CS and NJ PLCs
- 1 or 2 antenna channels
- 160 bytes per scan, data transfer up to 2,048 bytes
- Read/write with error correction, UID read and noise measurement commands
- Test mode and LED status indicators
CJ1W/CS1W-V680C1x ordering codes
| Part number | Description |
|---|---|
| CJ1W-V680C11 | ID Sensor Unit, CJ series, 1 antenna |
| CJ1W-V680C12 | ID Sensor Unit, CJ series, 2 antennas |
| CS1W-V680C11 | ID Sensor Unit, CS series, 1 antenna |
| CS1W-V680C12 | ID Sensor Unit, CS series, 2 antennas, external 24 V DC |
Other Omron RFID Systems
- OMRON V680S-HMD6x-ETN — 3-in-1 RFID reader/writer with Modbus TCP
- OMRON V680S-HMD6x-EIP/PNT — 3-in-1 RFID reader/writer with EtherNet/IP or PROFINET
- OMRON V680S-D2KF6x/D8KF6x — Battery-less FRAM RFID tag, 2 KB / 8 KB
- OMRON V680-D1KP/D2KF — Battery-less RFID tag, 1 KB EEPROM / 2 KB FRAM
- OMRON V680-HSxx/H01-V2 — RFID antenna, separate-amplifier and built-in-amplifier types
- OMRON V680-HA63A/HA63B — V680 RFID amplifier unit
- OMRON V680-CA5D01-V2/CA5D02-V2 — V680 RFID controller, 1 or 2 amplifiers
- OMRON NX-V680C1/C2 — NX-series RFID unit, 1 or 2 channels
- OMRON V680-HAM42-DRT/PRT — Amplifier-integrated RFID controller, DeviceNet / PROFIBUS ID slave
- OMRON V680-HAM91/HAM81 — Amplifier-integrated RFID controller (ID Flag Sensor), NPN/PNP output
- OMRON V680-CHUD/CH1D — Handheld RFID reader/writer
- OMRON V640 — 134 kHz RFID system for semiconductor applications (SEMI compliant)
Models from other brands: RFID Systems
Is this RFID system right for your application?
Share the read/write distance, the mounting surface of the tag (metal/plastic), the required memory capacity, the carrier speed, ambient conditions and your PLC network (Modbus TCP, EtherNet/IP, PROFINET, Profibus); let’s select the right reader, antenna and tag combination together.
All product specifications are subject to change without notice. Source: Omron, https://industrial.omron.eu/en/products/v680-v680s (Downloads); V680 Series datasheet Q267 (https://files.omron.eu/downloads/latest/datasheet/en/q267_v680_series_-_rfid_system_datasheet_en.pdf) (accessed 25 September 2026).