MWF204 is a multiplexing optical terminal device that can transmit four channels of RS-232/RS-485/RS-422 data over a single fiber optic cable. It supports multi-machine communication, adaptive data rates, and features such as lightning protection and electrostatic protection.
The MWF204 is a four‑channel optical multiplexing terminal that combines RS‑232, RS‑485 and RS‑422 signals onto a single fiber link. It supports both multimode (2‑5 km) and single‑mode (up to 20 km, with longer options) transmission and automatically adapts data rates from 300 bps to 115.2 kbps.
The manual details the device’s electrical and optical interfaces, indicator LEDs, dip‑switch configuration for channel mode selection, wiring guidelines for RS‑485/RS‑422, and recommended grounding. It also lists environmental limits, dimensions, power consumption, and warranty information. This manual is written in Chinese.
| Supported Serial Interfaces | RS‑232, RS‑485, RS‑422 |
|---|---|
| Lightning Protection | 600 Wns |
| Electrostatic Protection | 15 kV |
| Optical Interface Options | FC, ST, SC |
| Power Supply | DC 5 V, <5 W |
| Transmission Distance (Multimode) | 2 ~ 5 km |
| Transmission Distance (Single‑mode) | 20 km (40 km, 60 km, 100 km optional) |
| Data Rate | 300 bps ~ 115.2 kbps adaptive |
| Bit Error Rate | < 10⁻⁹ |
| Transmit Optical Power | > -10 dBm |
| Receiver Sensitivity | < -34 dBm |
| Wavelength (Single‑mode) | 1310 nm or 1550 nm |
| Wavelength (Multimode) | 850 nm / 1310 nm |
| Dimensions (L×W×H) | 136 mm × 90 mm × 30 mm |
| Weight | 0.8 kg |
| Operating Temperature | -20 °C ~ +85 °C |
| Relative Humidity | 0 ~ 95 % (non‑condensing) |
The MWF204 supports RS‑232, RS‑485 and RS‑422 signals on its four independent channels.
In single‑mode mode the unit can reach 20 km, with optional extensions to 40 km, 60 km or 100 km.
For RS‑485 the TX and RX+ lines are shorted to form the A and B pair, and the dip‑switch must be set to the RS‑485 position; pins 7 and 8 are left floating.