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RS485/422 Light-isolated ultra-long-range driver
RS485 interfaces are widely used in the communication between a lot of devices. Such differential signal can improve the anti-jamming performance and the communications distance of system. But in practice, short circuit often happens witch is caused by the outputting of opposite polarity signals from more than two RS485 node at the same time. This will damage interfaces. In addition, the communication distance of RS485 interfaces can only reach 1.2 km. Repeaters should be added if the distance is longer. The CAN-485G light-isolated ultra-long-range driver witch is developed by Fourstar completely solve the problems above. We use the CAN (Controller Aera Network) bus technology witch does not change the RS485/422 communication protocol to extend the RS485/422 communication distance to 10 km, and solve the power need of using repeater in field. can ensure it suits for all the RS485/RS422 software without changing the original software.
1, optical isolated voltage: 1000 VDC (up to 3000 VDC, a statement is required when ordering)
2, Power: external 5 V, 1W DC power supply
3, communication distance: 10 km (4800bps), 5km (9600bps), 2km (38400bps), 600m (115200bps)
4, communication rate: a maximum 230 kbps, the Baud rate is automatically adaptive without setting
5, communication protocol: Using half-duplex CAN bus without change the original RS485/422 protocol (software)
6, the network nodes: can compose the multi-machine communication network
with 110 nodes
7, transmission lines: twisted pair witch is 0.75 mm2 above, the cross-sectional area of twisted pair should be more than 1.5 mm2 and the capacitance between line should be less than 60 pf / m when
the length of lines are more than 1km
8, interface protection:
CAN port: Anti-lightning and anti-surge protection, repeatability surge capacity: Ipp = 100A (10/700us, 4KV)
standards: ITU-TK20/21, VDE 0433.
RS232 port: surge protection.
Power port: 500W TVS anti-lightning protection, anti-polarity of power protection.
9, Dimensions: 85 × 55 × 25
10, installation: installation of 35 mm standard rail and bolt hole
11, Weight: 100g
12, the working temperature: -20 ~ 75 ℃
13, the humidity: 0 to 90%