# KC21 IP65 RS-485 collector — ManThink

> KC21 — A protected wall-mounted enclosure with battery or external-power versions. EdgeBus handles protocols and data for distributed RS-485 devices.

Canonical: https://www.manthink.cn/en/products/collectors/kc21/

MANTHINK / KC21 
![KC21 IP65 RS-485 collector — product image](https://www.manthink.cn/assets/kc21.png)
Product image · Configuration depends on the ordered model

RECONNECT / EdgeBus data collectors

Bring distributed wired devices onto one network.

A protected wall-mounted enclosure with battery or external-power versions. EdgeBus handles protocols and data for distributed RS-485 devices.

- **Physical interface**: RS-485

- **Power options**: 10800 mAh battery / DC 5–24 V

- **Mounting**: Wall mount

- **Ingress protection**: IP65

[View specifications  ↓](https://www.manthink.cn/en/products/collectors/kc21/#specifications) [Official manual](https://www.think-link.net/docs/zh/Device/LoRaWANEBCollector/kc21)

01 / SPECIFICATIONS

## Check every specification that matters.

Start with interfaces, power and installation conditions.

[Read the full technical manual](https://www.think-link.net/docs/zh/Device/LoRaWANEBCollector/kc21)

|   |   |
| --- | --- |
| Physical interface | RS-485 |
| Power options | 10800 mAh battery / DC 5–24 V |
| Mounting | Wall mount |
| Ingress protection | IP65 |
| Flying leads | VCC、GND、485A、485B |
| Programmability | EdgeBus |
| Operating temperature | −40～85 ℃ |
| Dimensions | 120 × 72 × 28 mm |

Source: [KC21 Official manual](https://www.think-link.net/docs/zh/Device/LoRaWANEBCollector/kc21)  · Reviewed 2026-09-25. Confirm options, regional frequency bands and full model codes before ordering.

02 / CONNECTION

## Match the interface. Then connect the equipment.

Match physical interfaces and application protocols separately.

01 

### Bus signals

Connect 485A and 485B to the RS-485 device; protocol and communication settings must match.

02 

### VCC / GND

On the battery version, these connections supply external equipment; on the DC version, they power KC21. Do not interchange the wiring.

For terminal positions, wire assignments and installation, follow the [official wiring instructions](https://www.think-link.net/docs/zh/Device/LoRaWANEBCollector/kc21)  .

03 / CONFIGURATION

## Choose a configuration that fits your site.

01 Battery and continuous-DC models are different versions; interfaces and power direction vary.

02 Assess device count and power load against the sampling interval and site conditions.

[Visit the official store](https://manthink.taobao.com/) [Ask about KC21 ↗](mailto:info@manthink.cn?subject=KC21+Product+selection+inquiry)

The store and manuals open in a new tab. Available configurations are subject to confirmed order details.

## Compare related products

[Back to EdgeBus data collectors ↗](https://www.manthink.cn/en/products/collectors/)

![KC22 IP65 M-Bus collector — product image](https://www.manthink.cn/assets/kc22.png)

KC22 

### IP65 M-Bus collector

M-Bus

[KC22IP65 M-Bus collectorM-Bus↗](https://www.manthink.cn/en/products/collectors/kc22/) ![KC25 DIN-rail RS-485 collector — product image](https://www.manthink.cn/assets/kc25.jpg)

KC25 

### DIN-rail RS-485 collector

RS-485

[KC25DIN-rail RS-485 collectorRS-485↗](https://www.manthink.cn/en/products/collectors/kc25/)

THE NEXT CONNECTION / APPLICATIONS START HERE

## Once your devices are connected, let ThinkLink take it from there.

A general-purpose, AI-powered IoT platform with native LoRaWAN.
LoRaWAN / 4G connectivity, AI operations and micro-app development. Free self-hosting, one-command installation and customizable branding.

[Get the install command ↓](https://www.manthink.cn/en/#thinklink-deploy) 

[Discover ThinkLink](https://www.think-link.net/zh/) [ThinkLink App](https://www.think-link.net/zh/mobile/thinklink/) [TapLink](https://www.think-link.net/zh/mobile/taplink/)

[![Snapshot of a ThinkLink building micro-app demo](https://www.manthink.cn/assets/thinklink-shared-demo.png)
Micro-app demo · Try it online ↗](https://thinklink.manthink.cn/tkl-dashboard-web/#/custom-page-share/demo/91vpc9x9mqsx75ii)