The KLM-4118 analog input module manual provides wiring, installation, communication settings, and maintenance instructions.
The KLM-4118 is an 8‑channel analog input module that accepts 4‑20 mA current signals and supports RS‑232 or RS‑485/422 communication. It uses high‑precision components for accurate measurement and includes protection on power, communication, and input stages.
The manual covers technical specifications, mechanical dimensions, installation methods (screw‑mount or rail‑mount), wiring diagrams for power, communication and signal inputs, dip‑switch settings for baud rate and device address, and detailed communication protocol including command formats and examples. This manual is written in Chinese.
| Effective resolution | 16 bit |
|---|---|
| Input type | DC current signal |
| Input range | 4‑20 mA |
| Number of input channels | 8 |
| Accuracy | ±0.05 % |
| Zero drift | ±3 µA/℃ |
| Power supply range | 18‑36 VDC (standard +24 VDC) |
| Static power consumption | <0.6 W |
| Operating temperature | -10 ℃ ~ 60 ℃ |
| Storage temperature | -20 ℃ ~ 70 ℃ |
For RS‑232: pins 2 (TX), 3 (RX), 5 (GND). For RS‑485/422: pins 6 (RX+), 7 (RX‑), 8 (TX+), 9 (TX‑). The power pins are +Vs and GND.