Omron NB3Q-TW00B — 3.5" TFT HMI, Serial Only
SKU: NB3Q-TW00BUSD 138.00
3.5-inch TFT color HMI with serial (RS-232C / RS-422 / RS-485) connectivity. For compact panels without Ethernet.
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Product Overview
The NB3Q-TW00B is Omron's smallest NB-series HMI — a 3.5-inch TFT color touchscreen (320 x 240 pixels, 65,536 colors) that talks to a PLC over RS-232C or RS-422/485 serial only. It fits where panel space is tight and Ethernet isn't required: small packaging machines, lab / test stands, conveyor controllers, or any CJ1M / CJ2M / CP1L system where the only network is serial Host Link or Modbus RTU. Programming is done with NB-Designer (free Windows software).
When to pick this vs the other NB-series 3.5-inch and 5.7-inch HMIs
Pick NB3Q-TW00B (this SKU) when the panel cutout is small and you only need serial — the value-tier pick. Pick NB3Q-TW01B (already done) when you also need Ethernet (for NJ / NX controllers) or a USB Host port (for USB memory stick recipe transfer). Pick NB5Q-TW00B-V1 for a 5.7-inch screen on serial, or NB5Q-TW01B-V1 for 5.7-inch with Ethernet. Pick NB7W-TW01B-V1 for a 7-inch screen with Ethernet and USB Host.
Before ordering
The single COM port supports RS-232C, RS-422A, and RS-485 — selected by a DIP switch on the rear of the unit. Only one protocol is active at a time, so the HMI talks to one serial network (typically a single PLC). Project transfer from PC to HMI is via USB mini-B cable. Confirm your PLC protocol (Host Link for CP / CJ, FINS serial for CJ2, Modbus RTU for non-Omron PLCs) and set the COM port accordingly before commissioning.
Key Features
- 3.5-inch TFT color LCD, 320 x 240 pixels (QVGA), 65,536 colors
- Analog resistive touch panel
- RS-232C + RS-422A/485 on one COM port (DIP-switch selected)
- USB mini-B for project transfer
- No Ethernet, no USB Host (this SKU)
- IP65 front face (when properly mounted)
- 24 VDC powered, approx 5 W
- NB-Designer software (free, Windows)
- Up to 16 languages per project
- SKU: NB3Q-TW00B
- Series: NB3Q-TW00B
- Voltage: 24 VDC
Best-Fit Applications
- Small packaging machine or assembly cell with serial Host Link to a CJ2M-CPU11 / CPU12
- Test stand or laboratory measurement system with serial Modbus RTU
- Compact conveyor or batching controller with serial link to a CP1L PLC
- Replacement for legacy NT-series HMIs on existing CJ systems
- Building-automation sub-panel with serial link to a CJ1W-SCU21 SCU card
Buying Checklist
- Pick NB3Q-TW00B (this SKU) for 3.5" serial-only HMI
- Pick NB3Q-TW01B (already done) for 3.5" with Ethernet + USB Host
- Pick NB5Q-TW00B-V1 for 5.7" serial-only (more screen space)
- Pick NB5Q-TW01B-V1 (already done) for 5.7" with Ethernet
- Pick NB7W-TW01B-V1 for 7" with Ethernet and USB Host
- Pick NB10W-TW01B-V1 for 10.1" widescreen Ethernet HMI
Technical Specifications
| Model | NB3Q-TW00B |
|---|---|
| Display | 3.5" TFT, 320 x 240 (QVGA), 65,536 colors |
| Touch Panel | Analog resistive |
| Communication | 1 x COM1 (RS-232C / RS-422A / RS-485 via DIP switch) |
| USB | 1 x USB mini-B (programming) |
| Ethernet / USB Host | No |
| Supported Protocols | Omron Host Link, FINS, Modbus RTU, Mitsubishi MC, Siemens S7 MPI |
| Internal Memory | 128 MB flash |
| Power Supply | 24 VDC, approx 5 W |
| Front Face | IP65 (with gasket) |
| Operating Temperature | 0 to 50 °C |
| Dimensions | 128.8 x 102.0 x 52.8 mm; cutout 119.0 x 92.5 mm |
Resources & Downloads
FAQ for NB3Q-TW00B
What's the difference between NB3Q-TW00B and NB3Q-TW01B?
Same 3.5" screen and same NB-Designer software. TW00B (this SKU) is serial-only (RS-232C / RS-422 / RS-485 on one COM port) with USB mini-B for programming. TW01B (already done) adds an Ethernet port (for FINS / Host Link with NJ / NX controllers) and a USB Host port (for USB memory stick recipe transfer).
How do I connect the NB3Q-TW00B to a CJ2M-CPU11 or CJ2M-CPU12?
Connect the NB3Q's COM1 (DB9 female) to the CJ2M's built-in RS-232C port (DB9 female) using a DB9 cross-over / null-modem cable — Omron's XW2Z-200K (2 m) or XW2Z-500K (5 m) are pre-wired for this. Set the NB3Q's rear DIP switch to RS-232C, select Host Link in NB-Designer, and match the PLC unit number (default 0) and baud rate (default 9600).
Can the NB3Q-TW00B communicate with NJ-series controllers?
Only over serial — this SKU has no Ethernet port. To talk to NJ / NX controllers over Ethernet (FINS / EtherNet/IP), use the NB3Q-TW01B (already done) or any larger NB HMI with Ethernet. The NB3Q-TW00B still works with CJ-series CPUs (CJ1M, CJ2M, CJ2H) over serial Host Link, plus Modbus RTU and other serial protocols for non-Omron PLCs.
How do I transfer a project from NB-Designer to the HMI?
Connect a USB mini-B cable (standard USB-A to mini-B, like a digital camera) between your PC and the NB3Q's rear USB port. Build the project in NB-Designer, then use Transfer > Download to HMI. The NB3Q appears as a USB mass-storage device. For Ethernet-enabled HMIs, projects can also transfer over Ethernet.
Is the NB3Q-TW00B discontinued?
No — it's in active production as of 2024 and supported through at least 2030. The NB3Q-TW00B-V1 (V1 hardware revision) is the current variant with identical functionality. For new installations, plan to migrate to the V1 version or to NB3Q-TW01B-V1 if Ethernet is required.
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