MU-3485
The RS-485 (or RS-422) surge protector prevents the communication line agains induced overvoltage peaks and provides variable termination impedance.
The MU-3485 module is equipped with two discharge arrester CG75L and Transient Voltage Suppressor (TVS) diode provides a second level of RS-485 line protection.
In addition to the overvoltage protection itself, MU-3485 also allows to adjust the terminating impedance of the line in the range of 60 to 200 Ohms, or left it unconnected.
The MU-3485 module is designed for RS-485 two-wire lines, but can also be used for RS-422 (two modules, one for each pair of lines).
Block diagram:
SV1 - input terminals
SV2 - output terminals (straith-way line)
SV3 - output terminals (with additional protection)
Specifications
| Type | MU-3485 |
|---|---|
| Communication line | RS-485 (or RS-422) |
| Termination impedance | 60÷200 Ohm (or disabled) |
| Surge protection (both output lines) |
3x surge arrester |
| Surge arrester type | CG75L (CP Clare) |
| Additional protection at line with additional protection |
4x TVS diode |
| TVS diode type | BZW06-5V8 |
| Additional impedance at line with additional protection |
2x 4.7 Ohm |
| Housing & Dimensions | Modulbox 3M |
| Signal terminals | screw terminals, wire 2.5mm2 max. |
