RS-485 to RS-485 Optical Isolator with

Fail-Safe Protection   CE

Model 4850FS

Protect Your System From:

    Shorted Nodes

    Open Connections

    Damaged Transceivers

    Power Loss on a Node

    Software Lock-ups

    Ground Loops

    Power Supply Voltage Surges

    Transient Voltage Spikes

Description:

The 4850OFS prevents a single damaged or locked-up RS-485 device from taking down the

whole network. It protects your RS-485 network from most typical failures. Any device without

valid data is automatically removed from the network. The 4850FS fully isolates data signals

and ground.

The 4850FS works with both two wire half duplex and four wire full duplex systems. Driver enable

control is automatic with B&B’s Send Data Control circuit. The 4850FS uses terminal blocks on

each side of the device. It supports Transmit Data (A) and (B), Receive Data (A) and (B),

Protective Ground, and Signal Ground.

Specifications:

Isolation:

2.000 volts RMS for 1 min. optical isolation of data

lines and ground

Surge Suppression:

6.5V working peak voltage, bi-directional

over voltage suppressor

600W peak power dissipation

3,000 pF maximum capacitance

Data Rates:

Up to 460.8 kbps

Temperature Rating:

0^๐C to +70 ^๐C

Power Requirements:

9-14 VDC @ 60mA (idle state),

170mA (Full-duplex data with 60 Ohm load)

Dimensions:

3.8 x 2.4 x 1.0 in (9.7 x 6.1 x 2.5 cm)