- New
The main advantage of the device is full optical separation of 1 kV DC. This isolation occurs not only between the input and outputs but also independently between each of the four output ports. This solution guarantees the highest level of safety, protecting end devices against the effects of lightning strikes, surges, and potential differences that often occur in extensive installations. As a result, a failure in one part of the system does not spread to the others, which drastically increases the reliability of the entire infrastructure.
The use of the EW-485/4/1/SO allows for changing the network topology from a classic bus (serial) to a star topology. This is a much more flexible and fault-tolerant solution – damage or a short circuit in one of the branches does not affect the operation of the remaining branches of the system. The device supports transmission speeds of up to 1 Mbit, which ensures smooth and trouble-free communication even in the most demanding applications. The robust construction and wide supply voltage range (9-24V DC) make it a reliable product that is easy to adapt to existing power infrastructure. The distributor is an ideal solution for installers looking for reliable methods to secure and organise communication buses in modern surveillance and control systems.
EAN: 6931240037270 SKU: 931037276
EW-485/4/1/SO is a professional, active RS-485 bus distributor designed for extensive CCTV systems, access control systems, and building automation. This device plays a key role in situations where it is necessary to split a control signal from a single source, such as a digital video recorder (DVR), a control keyboard with a joystick, or a PC, into four independent branches. Thanks to the use of advanced signal amplification technology, the distributor allows for a significant extension of the maximum bus length, which is invaluable in large industrial facilities.
The main advantage of the device is full optical separation of 1 kV DC. This isolation occurs not only between the input and outputs but also independently between each of the four output ports. This solution guarantees the highest level of safety, protecting end devices against the effects of lightning strikes, surges, and potential differences that often occur in extensive installations. As a result, a failure in one part of the system does not spread to the others, which drastically increases the reliability of the entire infrastructure.
The use of the EW-485/4/1/SO allows for changing the network topology from a classic bus (serial) to a star topology. This is a much more flexible and fault-tolerant solution – damage or a short circuit in one of the branches does not affect the operation of the remaining branches of the system. The device supports transmission speeds of up to 1 Mbit, which ensures smooth and trouble-free communication even in the most demanding applications. The robust construction and wide supply voltage range (9-24V DC) make it a reliable product that is easy to adapt to existing power infrastructure. The distributor is an ideal solution for installers looking for reliable methods to secure and organise communication buses in modern surveillance and control systems.
Device type
Active RS-485 bus distributor and amplifier with full galvanic isolation
Number of inputs
1 pc. RS-485 - standard screw terminal for connecting the transmitter (e.g., recorder)
Number of outputs
4 pcs. RS-485 - independent output ports enabling the creation of a star topology
Galvanic separation
1 kV DC - provides protection against ground loops and potential differences between network segments
Optical isolation
Full isolation between input and outputs and independent isolation between each of the four outputs
Communication mode
Unidirectional RS-485 (Simplex) - ideal for controlling PTZ cameras
Transmission speed
Support for high speeds up to 1 Mbit/s, allowing operation with modern communication protocols
Surge protection
Built-in 600 W protection on all RS-485 ports and on the power input
Transmission range
The device regenerates the signal, allowing for significant bus extension beyond standard limits
Topology
Possibility of switching from serial to star topology, which facilitates cabling in large facilities
Power supply
Wide input voltage range from 9 V to 24 V DC, which facilitates integration with CCTV systems
Current consumption
Low power consumption at 150 mA with 12 V DC power supply
Application
CCTV systems (PTZ control), alarm systems, access control, industrial automation
Protections
Protection against lightning discharges and the effects of electrical failures at remote bus points
Manufacturer and Warranty
EWIMAR brand, product covered by a 2-year manufacturer's warranty
Contents
1x EW-485/4/1/SO bus distributor
Dimensions, Weight
Product dimensions: 32 x 107 x 83 mm (D x W x H)
Packaging dimensions: 50 x 160 x 115 mm (D x W x H)
Product weight: 93 g
Weight with packaging: 139 g
Specific References