Replacement for the Belimo ZTH US
The Belimo LINK.10 (Belimo Assistant Link) is the current-generation service tool that replaces the Belimo ZTH US handheld. It pairs with the free Belimo Assistant 2 app to configure and troubleshoot NFC-equipped Belimo devices. View the legacy ZTH US ›
FunctionBLE / USB to NFC & MP-Bus converter
InterfacesNFC · Bluetooth 5.0 LE · USB-C · MP-Bus
Power SupplyAC/DC 24 V · 2 W
Battery450 mAh, USB rechargeable
Bluetooth Rangemax 10 m
NFC Rangemax 0.79 in (2 cm)
EnclosureIP20 · Class III PELV
ReplacesBelimo ZTH US
Belimo LINK.10 — Belimo Assistant Link Converter
The Belimo LINK.10, also called the Belimo Assistant Link, is a Bluetooth-to-NFC and USB-to-MP-Bus converter for temporary wireless service of NFC-equipped Belimo actuators, VAV controllers and sensors. It lets a technician read and write device parameters from the free Belimo Assistant 2 app on smartphones, tablets or PCs that lack native NFC, and it works on both powered and unpowered devices.
Specifications per Belimo LINK.10 technical data sheet, en-us revision 2025-12-04.
Best for
- Field commissioning and troubleshooting of NFC-equipped Belimo devices
- Smartphones and tablets without built-in NFC (connects via Bluetooth)
- Configuring powered or unpowered actuators, VAV controllers and sensors
- Wired MP-Bus access from a PC or laptop using ZK1-GEN / ZK2-GEN cables
Warranty
Covered by the Belimo manufacturer warranty. See the Belimo terms or contact ZOT Supply for current coverage details.
Key Features
NFC ↔ Bluetooth/USB bridge
Connect to NFC-equipped Belimo devices from Belimo Assistant 2 even when your phone or tablet has no native NFC.
Powered & unpowered config
Point-to-point operation reads and writes device settings whether or not the actuator or sensor is energized.
Four interfaces in one tool
NFC, Bluetooth 5.0 Low Energy, USB 2.0 Type-C and MP-Bus in a single pocket-size converter.
Built-in rechargeable battery
450 mAh internal battery charges 20–70% in about an hour over USB-C; usable while charging.
Secure hands-free mounting
Gecko® Tape base plus retaining strap hold the LINK.10 to the device, including overhead installs.
Wired MP-Bus service
ZK1-GEN and ZK2-GEN cables connect a PC or laptop to the device service socket or MP/PP terminal.
Technical Specifications
| Product type | Belimo Assistant Link service converter (LINK.10) |
| Application | Bluetooth-to-NFC and USB-to-MP-Bus converter for temporary wireless operation of NFC-equipped Belimo devices via Belimo Assistant 2 |
| Operating mode | Point-to-point; powered and non-powered devices |
| Data interfaces | NFC, Bluetooth 5.0 Low Energy (BLE), USB 2.0, MP-Bus |
| Bluetooth range | max 10 m (depending on surroundings) |
| NFC range | max 0.79 in (2 cm) |
| NFC standard | ISO/IEC 14443, 13.56 MHz, up to 424 kbit/s |
| Nominal voltage | AC/DC 24 V, 50/60 Hz |
| Voltage range | AC 19.2–28.8 V / DC 21.6–28.8 V |
| Power consumption | 2 W |
| Electrical connection | USB 2.0 Type-C cable; RJ11 MP-Bus connector socket |
| Battery | Internal 450 mAh, not interchangeable; recharge 20–70% within 1 h |
| Protection class | III, Protective Extra-Low Voltage (PELV) |
| Degree of protection | IP20 |
| Ambient temperature | 32–122°F [0–50°C], non-condensing |
| Storage temperature | -4–131°F [-40–55°C], non-condensing |
| Transportation temperature | -4–176°F [-20–80°C] |
| Dimensions (B x L x H) | 45 x 75 x 21 mm |
| Weight | 0.15 lb [0.068 kg] |
| Certifications | IEC/EN 62368-1, IEC/EN 60950-1, IEC/EN 60529; FCC Part 15 Subpart B & C |
| Included service app | Belimo Assistant 2 (free; auto-updates the LINK.10) |
| Connecting cables (accessory) | ZK1-GEN (RJ11 to 6-pin service socket), ZK2-GEN (RJ11 to MP/PP wire), 16 ft [5 m] |
Documentation
Related Products
Frequently Asked Questions
What is the Belimo LINK.10 (Belimo Assistant Link)?
The LINK.10 is a Belimo service converter that bridges Bluetooth and USB to a Belimo device’s NFC and MP-Bus interfaces, so technicians can configure, operate and troubleshoot NFC-equipped Belimo actuators, VAV controllers and sensors from the free Belimo Assistant 2 app.
Does the LINK.10 replace the Belimo ZTH US?
Yes. The LINK.10 is the current Belimo Assistant Link service tool and is the replacement for the Belimo ZTH US handheld service tool.
Do I need a LINK.10 if my phone already has NFC?
No. An NFC-capable smartphone or tablet can connect directly to an NFC-equipped Belimo device through Belimo Assistant 2. The LINK.10 is for devices without NFC (it converts Bluetooth/USB to NFC) and for wired MP-Bus access from a PC.
Can the LINK.10 configure an unpowered actuator?
Yes. NFC draws power by electromagnetic induction, so the LINK.10 with Belimo Assistant 2 can read and write settings on both powered and unpowered Belimo devices.
What is the NFC working distance?
NFC communication works at up to 0.79 in (2 cm). The NFC logo on the LINK.10 should be aligned directly with the NFC logo on the Belimo device.
Is the battery replaceable?
No. The LINK.10 has a built-in 450 mAh battery that is not interchangeable. It recharges over USB-C (about 20–70% in one hour) and can be used while charging.
What cables and software are needed?
Wired service uses the ZK1-GEN or ZK2-GEN connecting cable. All configuration is done with the free Belimo Assistant 2 app, which also keeps the LINK.10 firmware up to date.
- Accessory Type:
- Service Tool
- Product Category:
- Interfaces, Cables
- Communication Interface:
- NFC
- Communication Interface:
- Bluetooth
- Communication Interface:
- USB
- Communication Interface:
- MP-Bus
- Power Supply:
- 24 VAC/DC
- Enclosure Rating:
- IP20
- Compatible App:
- Belimo Assistant 2
