This manual introduces FB400/FB900 series of optical transceiver modules, including the function, use, installation, debugging, maintenance and other contents of the optical module.
This manual provides safety precautions, installation steps and wiring instructions for the RKC FB400/FB900 digital controller. It explains required environmental conditions, recommended power‑supply protection and proper handling of terminals and mounting hardware.
The document also lists accessory parts, label information and basic parameter tables, and includes notes on electrical connections such as RS‑232, RS‑485, MODBUS‑RTU and power specifications. Users are advised to follow the detailed installation diagrams and torque specifications to ensure reliable operation. This manual is written in Chinese.
| Allowed ambient humidity | 5 %RH to 95 %RH |
|---|---|
| Power‑supply fuse rating | 250 V, 1 A |
| Terminal screw size | M3 × 6 mm |
| Recommended tightening torque | 0.4 N·m |
It can be used in environments with 5 %RH to 95 %RH humidity.
A fuse rated for 250 V and 1 A is recommended.
Screws should be tightened to about 0.4 N·m.