RS-485 galvanic separator, repeater, EW-485/1/1/So

RS-485 ground loop galvanic separator and repeater, designed for CCTV solution, EW-485/1/1/So, manufacturer

Description for product in version 3

The product has been designed to galvanic separation connected devices. Can be used also to extend length of the RS-485 network and increase amount of connected devices. It eliminates transmission interferences and possible damage to the RS-485 line drivers which is the result of ground-loop effect.

It is used with installations where transmission is always carried out in one direction - CCTV cameras, automation devices, etc. It use optical separation with 1kV insulation and 600W TVS diodes for overvoltage protection.

Removable connectors and very small dimensions of the device facilitate installation and service. EW-485/1/1/So should always be used on the receiving side of the RS-485 bus (at receivers). It is conditioned by optical separation only on the side marked as SLAVE. The MASTER side is always galvanically connected to the power supply. If the connection site will be reversed, the galvanic separation will be lost. If it is necessary to use the galvanic separator on the transmitting side, use the EW-485/1/2/So product.

The correct connection is shown in the following diagrams.

How to separate RS-485 network
Example of separation RS-485 network
Technical specification:
Parameter Value
Number of channels 1
Number of devices on the RS-485 Up to 128 devices
Baud rate
300bit~500kbit (10Mbit for special order)
Transmission mode
Half Duplex (two-way)
Galvanic insulation
1kV DC
ESD protection
600W - each port
Screw terminal, removable
LED indication
Power, transmission, receiving
Power 9~24VDC / 9~18VAC
Current consumption
50mA max @ 12VDC
Housing Standalone
Tightness IP40
Dimensions 74 x 32 x 27 (mm) with connectors
Operation temperature -20°C ~ 60°C