International Standards
- The standards are abbreviated as follows: U: UL, U1: UL(Class I Division 2 Products for Hazardous Locations), C: CSA, UC: cULus, UC1: cULus (Class I Division 2 Products for Hazardous Locations), CU: cUL, N: NK, L: Lloyd, and CE: EC Directives.
- Contact your OMRON representative for further details and applicable conditions for these standards.
| Unit type | Product name | Specifications | No. of unit numbers allocated | Current consumption (A) | Model | Stand- ards | ||
|---|---|---|---|---|---|---|---|---|
| Communications Interface | Communications functions | 5V | 24V | |||||
| CJ1 CPU Bus Units | Serial Communi- cations Units (High-speed type)  | 2 RS-232C ports | The following functions can be selected for each port with an CJ-system: Protocol macro Host Link NT Links (1:N mode) Serial Gateway No-protocol *3 Modbus-RTU Slave The following functions can be selected for each port with an NJ-system: Protocol macro Serial Gateway No-protocol Modbus-RTU Slave | 1 | 0.28 *1 | - | CJ1W-SCU22 *2 | UC1, N, L, CE |
| 2 RS-422A/485 ports | 0.4 | - | CJ1W-SCU32 *2 | |||||
| 1 RS-232C port and 1 RS-422A/485 port | 0.36 *1 | - | CJ1W-SCU42 *2 | |||||
| CJ1 CPU Bus Units | Serial Communi- cations Units  | 2 RS-232C ports | The following functions can be selected for each port: Protocol macro *4 Host Link NT Links (1:N mode) Serial Gateway *5 No-protocol *6 Modbus-RTU Slave *7 | 1 | 0.28 *1 | - | CJ1W-SCU21-V1 *8 | UC1, N, L, CE |
| 2 RS-422A/485 ports | 0.38 | - | CJ1W-SCU31-V1 *8 | |||||
| 1 RS-232C port and 1 RS-422A/485 port | 0.38 *1 | - | CJ1W-SCU41-V1 *8 | |||||
*1. When an NT-AL001 RS-232C/RS-422A Conversion Unit is used, this value increases by 0.15 A/Unit.
*2. Sinple Backup Function and Interrupt notification function cannot be used with an NJ-system.
*3. A Serial Communications Unit with unit version 2.1 or later, a CPU Unit with unit version 1.03 orlater, and Sysmac
Studio version 1.04 or higher are required to use the SerialRcvNoClear instruction.
*4. You can activate Protocol macro trace function when the CPU Unit is set to the RUN/MONITOR mode. (MONITOR
mode is not available with the NJ-series CPU Units.)
*5. The Serial Gateway function is enabled only for Serial Communications Units of unit version 1.2 and later.
*6. The no-protocol function is enabled only for Serial Communications Units of unit version 1.2 and later (and a CPU Unit
of unit version 3.0 or later is also required).
*7. The Modbus-RTU Slave function is enabled only for Serial Communications Units of unit version 1.3 and later.
*8. This unit cannot be used, with the Machine Automation Controller NJ-series.
*2. Sinple Backup Function and Interrupt notification function cannot be used with an NJ-system.
*3. A Serial Communications Unit with unit version 2.1 or later, a CPU Unit with unit version 1.03 orlater, and Sysmac
Studio version 1.04 or higher are required to use the SerialRcvNoClear instruction.
*4. You can activate Protocol macro trace function when the CPU Unit is set to the RUN/MONITOR mode. (MONITOR
mode is not available with the NJ-series CPU Units.)
*5. The Serial Gateway function is enabled only for Serial Communications Units of unit version 1.2 and later.
*6. The no-protocol function is enabled only for Serial Communications Units of unit version 1.2 and later (and a CPU Unit
of unit version 3.0 or later is also required).
*7. The Modbus-RTU Slave function is enabled only for Serial Communications Units of unit version 1.3 and later.
*8. This unit cannot be used, with the Machine Automation Controller NJ-series.
Accessories
| Model | Accessories | Specifications |
|---|---|---|
| CJ1W-SCU22 | 2 Serial Port (RS-232C) Connector | Connector set for serial port connection (D-SUB 9-pin male connector) |
| CJ1W-SCU32 | 2 Serial Port (RS-422A/485) Connector | Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact) |
| CJ1W-SCU42 | 1 Serial Port (RS-232C) Connector | Connector set for serial port connection (D-SUB 9-pin male connector) |
| 1 Serial Port (RS-422A/485) Connector | Terminal Block Connector (FMC1.5/5-STF-3.5AU by Phoenix Contact) | |
| CJ1W-SCU21-V1 CJ1W-SCU31-V1 CJ1W-SCU41-V1 | 2 Serial Port (RS-232C) Connector | Connector set for serial port connection (D-SUB 9-pin male connector) |
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