Schneider TSXCUSB485 USB-485 Programming Cable

Orientare: Original Schneider USB-to-RS485 adapter for Uni-Telway/Modbus, connecting PC to legacy TSX-series PLCs; obsolete spare part. Replacement part number: TSXCUSB485C.

Nota: This unit is merely a USB-485 converter box. The accessory cable TSXCRJMD25 (Mini-DIN8, 2.5 m) is mandatory for connecting to the TER port of Premium/Micro/Twido PLCs.

1. Specificații principale

4-Position Rotary-Switch Definition

✅ For direct PLC debugging: set rotary switch to 2 (TER-DIRECT)

2. Compatible Device List
3. PLC-uri

Premium TSX P57 series

Micro TSX 37 / TSX 07 serie

Twido TWDLCAE / TWDLMDA series

Nano, Neza series

2. HMI-uri: XBT-N/R/S series; OTB remote I/O; TSXSCA62 bus tap

❗Do NOT use for Altivar variable-speed drives or soft-starters; adapter damage may occur.

3. Sistem de operare & Driver Notes
4. Driver package for original TSXCUSB485: `TLXCDDRV20M`. The Uni-Telway driver suite is included during PL7-Pro / Unity Pro installation; separate download is unnecessary.
5. Original hardware: Windows XP, Win7. Poor compatibility under Win10/11; Error 39 frequently occurs. XP virtual-machine deployment is recommended.
6. Third-party compatible TSXCUSB485C: upgraded hardware supporting Win10/Win11, USB self-powered, no power drawn from PLC TER port. Works with both TER and AUX ports.
7. Virtual-machine tip: In VM-Ware / VirtualBox, fully pass-through the USB device to the guest OS. Stop the host-side `SchneiderUsbService` to avoid device occupation.

PL7-Pro Communication Parameters (Uni-Telway)

Network type: Uni-Telway

Serial settings: 8 biți de date, 1 oprește puțin, ODD parity, no flow-control; default baud rate 19200

PLC address: 1; COM port number must match Device-Manager assignment

The error `No remote ACK` is mostly caused by incorrect switch setting, wrong parity, or missing termination resistor.

4. Model Distinction (Puncte de confuzie comune)
5. TSXCUSB485: Original, sfârşitul vieţii; powered by PLC TER port; poor Win10 compatibility; sold as set: adapter body + TSXCRJMD25 cable.
6. TSXCUSB485C: Upgraded third-party compatible variant; USB-powered; Win10/Win11-capable; replaces TSXPCX3030 / TSXCUSB485.
7. TSXPCX3030: Older-generation USB programming cable, obsolete.
8. TSXPCX1031: RS232 serial Uni-Telway cable (physical COM-port, non-USB).
9. Depanare comună
10. Yellow exclamation mark / Error-39 in Device-Manager

Uninstall old drivers; block Windows automatic-driver updates; reinstall the Schneider Uni-Telway driver suite. Prefer XP virtual-machine for original hardware.

2. COM-port recognized but no online connection, No-ACK

① Set rotary-switch to position 2 TER-DIRECT; ② Verify TSXCRJMD25 cable integrity; ③ Serial port ODD parity; ④ 120 Ω termination resistor at bus end; ⑤ Confirm PLC TER-port hardware health.

3. Multidrop-mode communication OK, point-to-point fails: Abnormal PMC-pin level; use genuine TSXCRJMD25 cable.
4. Maximum of four TSXCUSB485 adapters per PC due to hardware serial-number licensing limit.
5. Foreign-Trade & Referință pentru achiziții

Complete kit: TSXCUSB485 adapter body + TSXCRJMD25 (2.5 m Mini-DIN8 cable)

Reference HS-code: 85176290 (USB-RS485 communication-conversion adapter)

Second-hand inspection checklist: Inspect DIN-rail clips; verify POWER/TX/RX-LED operation; confirm smooth rotary-switch rotation. Prefer testing online upload of PLC program inside XP virtual-machine.

7. Alternative-Selection Recommendations

New-project builds: Prioritize TSXCUSB485C, full Windows compatibility, USB self-powered.

Legacy-equipment maintenance: For used original TSXCUSB485, always deploy XP-SP3 virtual-machine. Avoid running original hardware natively under Win10 hosts.

Complete Programming-Procedure for TSXCUSB485 (USB-485)

Applicable PLCs: TSX Premium, TSX Micro, Twido; Protocol: Uni-Telway; Software: PL7-Pro / Unity Pro (Control Expert) / TwidoSuite

⚠️ Original TSXCUSB485 exhibits poor Win10/Win11 compatibility; XP virtual-machine recommended. TSXCUSB485C runs natively under Win10/Win11.

For direct connection to PLC TER programming-port: rotate adapter switch to 2 (TER-DIRECT point-to-point).

1. Hardware Wiring
2. Power-up PLC; confirm RUN-LED is active with no hardware-fault alarms.
3. Set TSXCUSB485 rotary-switch: Position 2 TER-DIRECT (PC direct programming for single PLC). Use position 0 TER-MULTI only for multi-node bus networks.
4. Plug adapter USB-A into PC USB2.0 port (avoid blue USB3.0 ports, which cause frequent communication glitches).
5. Connect matching cable TSXCRJMD25 (Mini-DIN8) to adapter; plug opposite end into PLC TER programming port.

For Twido units fitted with RJ45 communication-port, substitute cable XBTZ925. Never connect to drive AUX-port; permanent adapter damage may result.

2. Driver Installation
3. Driver package: `TLXCDDRV20M`. The Uni-Telway driver suite is bundled during PL7-Pro / Unity Pro installation and can also be installed separately.
4. Insert adapter. Open Device-Manager → Ports (COM & LPT). Confirm device entry `TSX C USB 485 (COMx)` with no yellow warning symbol and record assigned COM-port number.

Original hardware frequently triggers Error-39 under Win10. Workaround: XP virtual-machine with full USB-pass-through; ensure host OS does not claim the USB device.

3. Open Drivers-Manager (Schneider Driver Manager) from Windows Control-Panel. Select tab UNITELWAY Driver. Click【Edit】, select your recorded COM-port and save settings. Run XWAY-TEST to validate link status before launching programming-software.

Fixed Uni-Telway Serial Parameters (ODD parity is the most-common pitfall)

❗Do NOT use no-parity. 90 % of `No remote ACK` faults arise from incorrect parity, mis-set rotary-switch, or defective cabling.

3. PL7-Pro Online-Configuration (TSX Micro / Premium legacy PLCs)
4. Launch PL7-Pro and open project matching CPU model.
5. Top menu: `PLC → Define PLC Address`

Network type: Uni-Telway

Driver: UNTLW01

PLC address: SYS (fixed system address for TER-port programming; do not use address 1)

3. Confirm and click `PLC → Connect`.
4. Successful connection: CPU model is displayed in status bar.

Upload program: `PLC → Transfer → From PLC`

Download program: `PLC → Transfer → To PLC`

Online-monitoring and variable-forcing available; place PLC in STOP mode prior to download.

4. Unity Pro / EcoStruxure Control Expert Setup
5. Complete COM-port configuration inside Drivers-Manager; pass XWAY-TEST.
6. Inside Unity: `PLC → Set Address`

Mediu: UniTelway01

PLC address: SYS

3. Click Test-Connection; CPU-model identification indicates healthy communication.
4. Go Online → Connect for program upload / download operations.
5. TwidoSuite (Twido-series PLCs)
6. Configure Uni-Telway COM-port inside Drivers-Manager.
7. TwidoSuite communication-settings: select Uni-Telway, address SYS.
8. Go online for program upload / download.
9. Common Error-Handling
10. No remote ACK (most-frequent fault)

① Verify rotary-switch = 2 TER-DIRECT; ② enforce ODD parity; ③ inspect TSXCRJMD25 cable; ④ confirm PLC TER-port hardware integrity; ⑤ POWER-LED lit, TX/RX-LED blink during data traffic; ⑥ prefer USB2.0, avoid USB3.0 ports.

2. Error-39 yellow warning in Device-Manager: Original hardware is incompatible with Win10/Win11 kernel. Use XP-SP3 virtual-machine with full USB-pass-through; stop host-side Schneider USB-service.
3. Drivers-Manager reports COM-port Not-Ready: USB device seized by host OS. Re-plug adapter and restart Drivers-Manager.
4. XWAY-TEST failure and persistent software-connection-failure: hardware-layer fault. Inspect cabling, rotary-switch setting and PLC TER-port power supply.
5. Observații importante
6. Original TSXCUSB485 draws operating power from PLC TER-port. If TER-port fails, POWER-LED stays dark and no communication occurs. TSXCUSB485C variant draws power from USB-bus.
7. Maximum of four TSXCUSB485 adapters can run simultaneously on one PC, enforced by hardware serial-number limits.
8. 120 Ω termination resistor required for multi-drop bus. For direct TER-port point-to-point link, built-in adapter termination is sufficient; external resistor is normally unnecessary.
9. Switch PLC to STOP before program download; online-monitoring may run while PLC remains in RUN.

How to verify whether TSXCUSB485 runs natively under Win10/Win11

Core conclusion: Original TSXCUSB485 (no suffix-C) is NOT officially supported on Win10/Win11; Error-39 is highly probable. TSXCUSB485C is an upgraded third-party variant with USB self-power and Win10/Win11 compatibility.

⚠️ Notă: TSXCUSB485C is NOT genuine Schneider new-old-stock. Schneider has ended production; all available units are third-party clones.

Method 1: Read label printed on housing (fastest check)

1. TSXCUSB485 (no suffix-C, original Schneider)

❌ No native Win10/Win11-64-bit support

Powered by PLC TER-port; USB connector carries only signal, not operating power. POWER-LED stays dark when TER-port hardware fails.

Symptoms under Win10/Win11: yellow warning in Device-Manager, Error-39, driver cannot load. Even when COM-port appears, online sessions are unstable and prone to disconnection.

Officially qualified OS: Windows XP, Win7-32-bit. Use XP virtual-machine with full USB-pass-through for Win10-host computers.

2. TSXCUSB485C (suffix-C, third-party compatible)

✅ Works under Win10/Win11-32/64-bit

USB-bus-powered, independent of PLC TER-port power. POWER-LED remains lit even when PLC TER-port is defective; only communication will fail.

Hardware auto-flow-control; same four-position rotary-switch; supports Uni-Telway and Modbus-RTU.

Pitfall: Some compatible adapters print only TSXCUSB485 (omit-C suffix). Judge by power-supply-behaviour in such ambiguous-label cases.

Method 2: Hardware power-supply-behaviour test (for unreadable labels)

Quick field test: Connect adapter USB-A to PC, leave field-side connector open-circuit (disconnected from PLC).

LED off → legacy original TSXCUSB485, poor Win10/Win11 compatibility.

LED immediately on → upgraded TSXCUSB485C, native Win10/Win11-capable.

Method 3: Device-Manager observation under Windows

1. Insert original TSXCUSB485 into Win10/Win11 host:

Yellow warning icon with Error-39, message “driver cannot be loaded”.

Even after disabling memory-integrity and driver-signature-enforcement, COM-port may vanish randomly and online-timeouts occur.

Manufacturer statement: Original drivers lack Win10/Win11 digital-signatures. Modern Windows kernel security blocks driver-loading. No reliable native workaround exists; virtual-machine deployment is the accepted solution.

2. TSXCUSB485C upgraded variant:

After driver installation, COM-port appears without warning marks. Recognised within Drivers-Manager; XWAY-TEST passes normally.

Common Misconceptions Clarified

1. Updating Schneider driver suite will NOT make legacy TSXCUSB485 work under Win10/Win11

This is hardware-firmware limitation, not driver-version issue. New-generation Windows kernel security will still reject unsigned legacy drivers irrespective of Modbus-Driver-Suite release-version.

2. PL7-Pro itself does not run natively on Win10/Win11. Even with TSXCUSB485C hardware, PL7-Pro still requires virtual-machine environment. Unity Control Expert can run natively under Win10/Win11 paired with TSXCUSB485C.

Sourcing Recommendations

1. If you own genuine legacy TSXCUSB485 and host-PC runs Win10/Win11: deploy XP-SP3 virtual-machine with complete USB-device-pass-through. Do not attempt native-host operation.
2. New-spare-part procurement: select TSXCUSB485C for modern-OS compatibility with USB-self-power.