ZKA8 waterproof digital control instrument and ZKB8 explosion-proof digital control instrument are intelligent digital hand-held controllers developed for indoor and outdoor harsh environments and flammable and explosive areas. They automatically accept system or adjusting instrument set-point signals and valve position feedback signals, and output corresponding switch quantity control signals (forward and reverse), replacing servo amplifiers to directly drive the executive mechanism.
The Tiankang ZKA8 and ZKB8 series are intelligent digital hand controllers designed for harsh indoor/outdoor and explosive environments. They accept standard 4‑20 mA, 0‑10 mA, 1‑5 V or 0‑5 V input signals and output corresponding control signals for forward/reverse operation.
The manual provides an overview of the device, technical specifications, selection guidance, installation wiring diagrams, operation instructions, functional description, communication protocol details and appendices. It also includes safety notes for sealing the instrument after wiring. This manual is written in Chinese.
| Basic error | 0.3% FS |
|---|---|
| Display | Dual four‑digit LED |
| Output signal | 4‑20 mA (customizable) |
| Power supply | AC220 V, DC24 V |
| Operating temperature | -20 °C to 45 °C |
| Operating humidity | 0 % to 100 % RH |
| Protection rating (ZKA8) | IP65 |
| Protection rating (ZKB8) | IECEx/Ex dIIBT6 |
| Communication interfaces | RS485, RS232 |
| Sampling period | 0.8 s |
After completing the wiring, close the cover plate carefully and tighten the screws evenly to ensure a sealed enclosure.
The ZKA8 model is rated IP65 for waterproof protection, while the ZKB8 model meets IECEx/Ex dIIBT6 explosion‑proof standards.
The controller includes RS485 and RS232 communication ports.