Type:Logic ICs
Condition:New
Baby model:GL485-485-4
This product is a 4-out (a drag four) type, industrial control, automation engineering, communications, robotics, data collection and control system dedicated 485 repeater, 485 and 485 exports between completely optical isolation, 485 communication host The impact of interference by external lines; 485 data flow to the hardware entirely by automatic control, data transmission zero delay; This product has long been a lot of old customers supporting long-term use.
Below is a schematic diagram of the motherboard, please refer to:
Mechanical dimensions:120x71x29mm
Technical index
The external power supply, DC12~24V power supply:Recommend DC12V
The current: 60mA (static)
The half duplex communication mode:
The communication rate adaptive 0~115200bps
The load quantity: each end up to 16
The communication distance: not less than 1200 meters
The electrical signal: power supply, signal RS-485 double isolation
The antistatic impact indicators: + 15KV (human body model)
The lightning (instantaneous 1500 watts)
Characteristic
1, a wide range of input voltage, the internal power processing circuit with reverse protection mechanism, the input power is negative in the reverse case will not do any harm to the internal circuit, but the module cannot be normal power supply, the power supply in the correct way to access to the normal use of the module.
2, the selection of a new generation of RS-485 MAXIM chip, with a strong load capacity, GL485-485-4 products up to the bus can be linked to 16*4 485 from the device.
3,Photoelectric isolation:Built in isolation power module and high speed photoelectric coupler, the two ends of the power supply and RS-485 signal completely isolated, greatly reducing the error rate of the bus data.In no case isolation, any end signal and power fluctuation will be transmitted directly to the other end of the RS-485 bus, thereby causing the host receiving data is not correct, then triggered the master-slave communication is not smooth, the host query success rate is low.
4, easy to install and use. RS-485 end uses detachable terminal.
5,Has certain protection function to the lightning strike and so on instantaneous high pressure impulse. MAXIM RS-485 chip used for industrial grade, with high voltage pulse resistance; in addition to the RS-485 bus with the transient two tubes, in 1500 Watt High voltage instantaneous transient current generated by high pressure quickly spilled into the ground so as to suppress the spike for.
Matters needing attention
The external power supply voltage range not long time exceeds the set value, the polarity of the power supply can not be reversed, otherwise the module does not work.
The module can not be disassembled. Apart from the module observation or maintenance is not meaningful, as a result of arbitrary demolition module damage, all the responsibility of the user.
The ground should have sufficient cross-sectional area, can not be too small, generally larger and better ground.
TheRS-485 bus connection line is best to use shielded twisted pair, the bigger the better, to suppress the interference signal has a very good effect, signal transmission distance and the signal line of the thickness of a great relationship, the general line of the lower the transmission distance, the signal distortion rate is smaller.
GL485-485-4 type repeater connection:
VSS is isolated by the relay terminalPick up the shell or the earth or not connected)
A1 is the relay terminal RS-485 signal A
B1 is the relay terminal RS-485 signal B
+12V relay terminal external power supply, range DC12~24V
GND relay terminal external power supply ground
A2 relay terminal first road A signal RS-485
B2 relay terminal first road B signal RS-485
A3 relay terminal second road A signal RS-485
B3 relay terminal second road B signal RS-485
A4 relay terminal third road A signal RS-485
B4 relay terminal third road B signal RS-485
A5 relay terminal fourth road A signal RS-485
B5 relay terminal fourth road B signal RS-485
Application case:
The 485 repeater module is designed for reliable communication distance and industrial design, has been widely used in electric power control system, PLC communication, access control system, distributed 485 outdoor interference multi-point temperature acquisition system, instead of Taiwan and domestic well-known brand communication module, the test for many years and many industrial applications the occasion, stable performance, high cost, is a substitute of Taiwan well-known brands such as the ideal module, if you don't want to lose performance and want to reduce the cost, please try to choose the module, finally you will find that your choice is correct!
