Description
BRT 485B Isolated RS485 repeater is a high-performance industrial-level RS485 signal amplifier and extender. It can automatically sense the direction of the data flow and the communication baud rate, without any control or handshake signals, and ensure full transparent transmission of data. The RS485 repeater has anti-surge protection and electrostatic protection functions, its power supply input and communication signal channel are completely isolated. It has following features: long transmission distance, high speed, stable and reliable performance, etc. It is widely used in attendance machines, IC card toll collection systems, automated control, access control systems, parking lots, canteen sales systems, and highway toll collection systems.
Main Features
• Industrial level design, complete isolation, stable reliable data communication max. transmission rate up to 300Kbps;
• Built-in high-quality DC/DC isolated power module to achieve electrical isolation among input, output, power supply ports;
• Support multi-machine communication, up to 128 nodes can be connected, the longest transmission distance is 1500 meters;
• Using data flow automatic control technology, automatically detect and control the data transmission direction;
• Multiple protection measures: ± 15KV ESD protection, 600W dual-channel TVS protection
• Wide range power supply: 8-36VDC, has anti-reverse protection;
• Have operating status and power supply LED lamp indicator.
Technical Parameters
| Specs | TYP Value (Recommended) | Max. Limited Value |
| Operating power supply | 9-36VDC | 36VDC |
| Rated power | Black shell: 0.36W (9V/35m；12V/27mA；24V/15mA) White shell: 0.3W (9V/30mA；12V/23mA；24V/12mA) | 0.5W |
| Load capacity | 1-128 nodes | 128 nodes |
| Communication distance | Black shell: 0-1500m White shell: 0-1200m | Black shell: 1500m White shell: 1200m |
| Transmission rate | Black shell: 300-115.2Kbps White shell: 300-500Kbps | Black shell: 300Kbps White shell: 500Kbps |
| Operating temperature | -30℃ to 70℃, >95% R.H. | -40℃ to 80℃ |
| Isolation voltage | 2000KDC | 2500VDC |
| Protection | ± 15KV ESD, 600W TVS | -- |
| Size & Weight | 97x50x31mm, about 65g | -- |
*Recommend using the RS485 Repeater by following the technical parameters above, otherwise it may affect its performance or cause permanent damages.
RS485 Bus Cable for Communication
• Use 2-core shielded twisted pair cable
• Copper, wire diameter 0.5～0.75 square millimeter,
• Impedance 38～88 ohm/km.
• Capacitive resistance 30～50 nF/km,
• 2-core shielded twisted-pair cable with 20mm twisting distance (if the cable distance is not more than 500 meters, the cable standards can be appropriately reduced, but it must be a twisted pair cable)
RS485 Bus Cable Wiring
• The RS485 communication cable must use shielded-twisted pair cable, recommend using multiple-strand shielding cable, the length does not exceed 1200 meters.
• The wiring cable should be as far away from the high-voltage cables, do not parallel to the power grid wires or tied together.
• The RS485 bus cable connection method must be a hand-in-hand bus structure, DO not using star connection or Y type connection.
• More than 30 controllers or the cable is longer than 500 meters, recommend using 485 repeaters.
• The AC-powered equipment and chassis must be grounded and connect to ground well.
• Connect the GND ground of all 485 devices by using shielded cable.
• Connect 120Ω terminal resistors in parallel to the 485+ and 485- of the last RS485 device.
Additional information
| General Specifications | |
| Power Supply | 8-36VDC |
| FAQ | |
| Packing List | 1pcs x Original Isolated RS485 Repeater Module 1set x English version user manual |
| How to buy? | Click Button" Add to cart" —-> then Button "View cart"—->go next step accordingly. |
| About Shipping | Shipped by DHL, EMS or Post Registered Airmail Parcel |
| Payment Methods | >>A. Credit Card, Visa Card, Master Card, etc online payment. >>B. Credit card payment through Paypal secured if Paypal service is available in your country. >>C. Paypal online payment secured if you have a Paypal account. |
| Why Choose Us? | -More than 5 years practice. -Various full range. -MOQ 1 unit. -Factory direct price. -24 months warranty. -No extra bank/Paypal charge |
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