Omron CJ1W-SCU32 — CJ SCU@2 High-Speed, 2 RS-422A/485
SKU: CJ1W-SCU32USD 205.00
CJ-series SCU@2 high-speed serial unit with two RS-422A/RS-485 ports on 5-pin terminal blocks. 230.4 kbps, 1,200 m RS-422A/485 run.
1-Year Warranty
Full manufacturer warranty
Global Shipping
Worldwide delivery available
Genuine Omron
100% authentic product
Ready to Ship
Usually ships within 24h
In Stock
This item is available for immediate shipment from our warehouse.
Contact for pricing, bulk discounts, and shipping
Product Overview
The Omron CJ1W-SCU32 is the high-speed 2-port RS-422A / RS-485 member of the CJ-series CPU-bus serial communication family. Pick it when a CJ or CJ2 cabinet needs two long-distance RS-422A / RS-485 lines from one slot and the 230.4 kbps SCU@2 ceiling (the standard SCU-V1 family tops out at 38.4 kbps).
The front face carries COMM1 and COMM2 as 5-pin removable terminal blocks for RS-422A (4-wire) or RS-485 (2-wire / 4-wire). Each port sets independently to protocol macro, Host Link, NT Link 1:N, serial gateway, no-protocol, or Modbus-RTU slave. The RS-422A / RS-485 cable run reaches 1,200 m -- the SCU@2 high-speed advantage over the SCU31-V1 standard-speed 500 m ceiling -- and 32 drops sit on one port.
Power comes from the CJ backplane at 0.40 A on 5 VDC. The SCU32 takes one CJ CPU-bus slot (up to 16 high-function CPU-bus units / 32 serial ports per CJ rack). It is NOT hot-swappable, and Modbus-RTU acts only as a slave. On an NJ-series CPU the per-port protocol list drops to protocol macro / serial gateway / no-protocol / Modbus-RTU SLAVE (Host Link and NT Link are not supported on the NJ via the SCU).
Setup uses CX-Protocol (CX-Programmer add-on) for protocol macro and CX-Programmer over Ethernet (when a CJ1W-ETN21 or CJ1W-EIP21 sits elsewhere on the rack) for general ladder / FINS uploads.
Approvals: UC1, N, L, CE. Made in Japan.
Key Features
- CJ-series SCU@2 high-speed CPU-bus serial communication unit
- Two RS-422A / RS-485 ports on 5-pin removable terminal blocks (COMM1, COMM2)
- Per-port protocol (CJ system): protocol macro, Host Link, NT Link 1:N, serial gateway, no-protocol, Modbus-RTU SLAVE
- Per-port protocol (NJ system): protocol macro, serial gateway, no-protocol, Modbus-RTU SLAVE (Host Link / NT Link not supported)
- Up to 230.4 kbps per port in SCU@2 high-speed mode (standard SCU-V1 family tops at 38.4 kbps)
- RS-422A / RS-485 cable run to 1,200 m (SCU@2 advantage over standard-speed 500 m ceiling)
- RS-422A 4-wire full-duplex or RS-485 2/4-wire half-duplex per port via DIP switch
- Up to 32 RS-422A / RS-485 drops on one port
- 0.40 A from the 5 VDC CJ backplane
- Up to 16 SCU / high-function CPU-bus units / 32 serial ports per CJ rack
- NOT hot-swappable; Modbus-RTU acts only as slave
- Approvals: UC1, N, L, CE; Made in Japan
- SKU: CJ1W-SCU32
- Series: CJ-series CPU-bus high-function unit, SCU@2 high-speed family
Best-Fit Applications
- Two long-distance RS-422A / RS-485 multi-drop chains from a single CJ slot (up to 1,200 m / 32 drops each)
- Mixing Host Link on one port with Modbus-RTU slave on the other in the same CJ rack
- High-speed barcode-scanner / weigh-scale data exchange on RS-422A at 230.4 kbps
- Bridging RS-422A VFD banks to a CJ / CJ2 PLC when the SCU-V1 500 m / 38.4 kbps is not enough
- Modbus-RTU slave bridge for a third-party SCADA / HMI talking to the CJ over FINS serial gateway
- Pair with an NT-AL001 link adapter on a CJ1W-SCU22 (NOT on this SKU) for 1:N RS-422A at 500 m
Buying Checklist
- Pick the CJ1W-SCU32 when the cabinet needs two long-distance RS-422A / RS-485 ports in one slot and the SCU@2 230.4 kbps / 1,200 m ceiling.
- Pick the CJ1W-SCU22 instead when both ports should be RS-232C.
- Pick the CJ1W-SCU42 when the cabinet needs one RS-232C and one RS-422A / RS-485 (mixed-port)
- Pick the CJ1W-SCU31-V1 for a standard-speed 2 x RS-422A / RS-485 (38.4 kbps / 500 m) spare replacement
- Pick the CJ1W-SCU21-V1 when the cabinet needs 2 x RS-232C on standard-speed
- Confirm spare CJ CPU-bus slots -- the SCU32 takes one slot and counts toward the 16-units-per-rack limit
Technical Specifications
| Series | CJ-series CPU-bus high-function unit, SCU@2 high-speed family |
|---|---|
| Model | CJ1W-SCU32 |
| Ports | 2 x RS-422A / RS-485 on 5-pin removable terminal blocks (COMM1, COMM2) |
| Max Baud Rate | 230.4 kbps per port (SCU@2 high-speed) |
| Cable Run | RS-422A / RS-485 up to 1,200 m; up to 32 drops per port |
| Protocols (CJ system) | Protocol macro, Host Link, NT Link 1:N, serial gateway, no-protocol, Modbus-RTU slave |
| Protocols (NJ system) | Protocol macro, serial gateway, no-protocol, Modbus-RTU SLAVE |
| Current Draw | 0.40 A at 5 VDC from CJ backplane |
| Per-rack Limit | Up to 16 SCU / high-function CPU-bus units / 32 serial ports per CJ rack |
| Hot-Swap | Not supported |
| Dimensions / Weight | 31 x 90 x 65 mm slim CJ CPU-bus body, 120 g or less |
| Approvals / Origin | UC1, N, L, CE; Made in Japan |
Resources & Downloads
FAQ for CJ1W-SCU32
What is the difference between CJ1W-SCU32 and CJ1W-SCU31-V1?
SCU32 is on the SCU@2 high-speed family (up to 230.4 kbps, RS-422A / RS-485 cable run to 1,200 m). SCU31-V1 is on the SCU-V1 standard-speed family (up to 38.4 kbps, RS-422A / RS-485 cable run to 500 m). Both carry two RS-422A / RS-485 ports. Pick SCU32 for new high-speed builds; pick SCU31-V1 as a like-for-like spare on an existing standard-speed panel.
Does the CJ1W-SCU32 have any RS-232C ports?
No. The SCU32 carries two RS-422A / RS-485 ports on 5-pin terminal blocks. If the cabinet needs RS-232C, pick the CJ1W-SCU22 (two RS-232C at 230.4 kbps SCU@2) or the CJ1W-SCU42 (one RS-232C + one RS-422A / RS-485 mixed-port SCU@2).
Is the CJ1W-SCU32 hot-swappable?
No. CJ-series SCUs are not hot-swappable. Power the rack down before inserting or removing an SCU32. (CS1D duplex modules and SRT2-series SmartSlice I/O blocks support hot-swap; the CJ1W-SCU32 does not.)
Can the CJ1W-SCU32 act as a Modbus-RTU master?
No. The SCU32 lists Modbus-RTU SLAVE in the per-port protocol menu. Use the SCU as a slave and let the CJ CPU scan it via serial gateway, or use a dedicated master module if the field device is a slave that the PLC needs to poll on its own.
Similar Products
Explore related Omron models often viewed alongside this product.
