Description
High-performance Photoelectric Isolator RS485 Isolated Repeater Distance Extender Converter Amplifier RS485 Repeater
Product Description
Isolated RS485E repeater is a high-grade industrial-grade RS485 signal amplification extender. Products can automatically sense the direction of the data flow and communication baud rate, without any control or handshake signal to ensure that the data transparent transmission. Equipment power and communication signals are completely isolated, at the same time with the surge protection, electrostatic protection and other measures. With transmission distance, high speed, stable and reliable performance characteristics. Widely used in attendance machines, IC card charging system, automation control, access control systems, parking, canteen Shoufan system, highway toll system.
Feature
1, industrial design, communication completely isolated, stable and reliable performance, the transmission rate is up to 500Kbps;
2, built-in high-quality DC / DC isolated power supply module, to achieve the electrical isolation between ports;
3, support multi-machine communication, up to 128 nodes can be connected, the fastest transmission distance of 1200 meters;
4, data flow automatic control technology, automatic identification and control data transmission direction;
5, multiple protection measures: plus or minus 15KV ESD protection, 600W dual TVS protection 2.5KV communication isolation;
6, a wide range of power supply up to 9-36VDC, and has anti-reverse protection;
2, built-in high-quality DC / DC isolated power supply module, to achieve the electrical isolation between ports;
3, support multi-machine communication, up to 128 nodes can be connected, the fastest transmission distance of 1200 meters;
4, data flow automatic control technology, automatic identification and control data transmission direction;
5, multiple protection measures: plus or minus 15KV ESD protection, 600W dual TVS protection 2.5KV communication isolation;
6, a wide range of power supply up to 9-36VDC, and has anti-reverse protection;
Product Paramenters
The RS485E device is suitable for long-term stable operation at the recommended value. The equipment will not be damaged at the limit value, but may cause the performance to decrease. Do not exceed the limit range at any time. Otherwise, it may cause damage to the equipment.
|
Item / parameter
|
Recommended value (typical value)
|
Limit value
|
|
working voltage
|
DC:9-36V
|
DC:9-36V
|
|
Rated power
|
0.36W (9V/35mA; 12V/27mA; 24V/15mA)
|
0.5W
|
|
working temperature
|
-30C70C
|
-40C80C
|
|
Responsible ability
|
1-128 node
|
128 node
|
|
Communication distance
|
0-1200 meters
|
1200 meters
|
|
Communication speed
|
300-500K BPS
|
500Kbps
|
485 wiring Note
1. 485 communication lines must be shielded twisted pair, the best multi-share reserve, the total length of not more than 1,200 meters.
2. Wiring as far as possible away from the high-voltage wire, do not parallel with the power cord, but can not be bundled
together.
3. 485 bus must be hand-hand bus structure, and resolutely put an end to star connection and fork connection.
4. More than 30 controllers or lines longer than 500 meters, must use 485 repeater.
5. AC power supply equipment and chassis must be truly grounded, and well grounded.
6. Connect the GND ground of all 485 devices with shielded cable.
7. Connect the 120 ohm terminating resistor to 485 + (A) and 485- (B) of the last 485 device.
2. Wiring as far as possible away from the high-voltage wire, do not parallel with the power cord, but can not be bundled
together.
3. 485 bus must be hand-hand bus structure, and resolutely put an end to star connection and fork connection.
4. More than 30 controllers or lines longer than 500 meters, must use 485 repeater.
5. AC power supply equipment and chassis must be truly grounded, and well grounded.
6. Connect the GND ground of all 485 devices with shielded cable.
7. Connect the 120 ohm terminating resistor to 485 + (A) and 485- (B) of the last 485 device.
communication using RS-485 bus wire selection requirements
Use 2-core shielded twisted pair
Copper, diameter 0.5 to 0.75 square millimeters,
Impedance 38 to 88 ohms / km,
Capacity of 30 to 50 nanometer method / km,
Twisted 20 mm 2-core shielded twisted pair (if the line distance of not more than 500 meters can be appropriate to reduce the standard line, but must be twisted pair)
Copper, diameter 0.5 to 0.75 square millimeters,
Impedance 38 to 88 ohms / km,
Capacity of 30 to 50 nanometer method / km,
Twisted 20 mm 2-core shielded twisted pair (if the line distance of not more than 500 meters can be appropriate to reduce the standard line, but must be twisted pair)
bus limit
Consists of two or more devices with physical connections between each other, the bus can be connected up to 128 devices, without repeater in the case of the bus length of not more than 1200 meters. The system bus should not branch, such as branch is inevitable, you must meet the following requirements:
1. The length of the branch is not more than 10 meters; the sum of the bus length is not more than 800 meters; the total number of equipment on the extension line shall not exceed 50.
2. All communication signal lines should be as far away from the interference source, the signal line should go weak wells, can not be with strong power (such as 220 V residential power) or RF signal lines (such as CATV, large signal audio cable) parallel line, if walking Line, the distance should be greater than 0.5 meters.
3. All line contacts must be welded or screwed tight connection, and do waterproof and moisture-proof treatment, for example, can be welded after the contact with a waterproof tape wrapped or sealed with epoxy resin.
1. The length of the branch is not more than 10 meters; the sum of the bus length is not more than 800 meters; the total number of equipment on the extension line shall not exceed 50.
2. All communication signal lines should be as far away from the interference source, the signal line should go weak wells, can not be with strong power (such as 220 V residential power) or RF signal lines (such as CATV, large signal audio cable) parallel line, if walking Line, the distance should be greater than 0.5 meters.
3. All line contacts must be welded or screwed tight connection, and do waterproof and moisture-proof treatment, for example, can be welded after the contact with a waterproof tape wrapped or sealed with epoxy resin.
signal to the ground
1. All devices on the same network segment must have a uniform signal ground to avoid common mode interference.
2. Centralized power supply, the same network segment on all the power (including the communication device comes with power) DC negative directly connected together to form a common signal ground,
At this point the signal is the DC power ground.
3. When the individual is powered independently, connect the ground (black line) pins of all the bus devices on the same network segment together, thus forming the common signal ground.
2. Centralized power supply, the same network segment on all the power (including the communication device comes with power) DC negative directly connected together to form a common signal ground,
At this point the signal is the DC power ground.
3. When the individual is powered independently, connect the ground (black line) pins of all the bus devices on the same network segment together, thus forming the common signal ground.
recommend a few debugging methods
First of all to ensure that the equipment wiring is correct, and strictly in line with norms:
1, common method: with a line or shielded cable to all 485 devices connected to the GND, so as to avoid the existence of all devices affect the communication potential difference.
2, the terminal resistance method: 485 + 485 in the last 485 and 485-connected 120 ohm termination resistor to improve the communication quality.
3, the middle section of the break method: by disconnecting from the middle to check whether the device is too much load too long communication distance of a device damage to the entire communication line and other reasons.
4, a separate pull line method: a simple simple to pull a line to the device, this can be used to exclude whether the wiring
caused a communication failure.
5, replace the converter method: carry a few converters, so you can rule out whether the converter quality problems affect the communication quality.
6, notebook debugging method: first to ensure that their own portable computer notebook is the communication of normal equipment, replace the customer computer, to communicate, if you can, that the customer's computer's serial port may be damaged.
1, common method: with a line or shielded cable to all 485 devices connected to the GND, so as to avoid the existence of all devices affect the communication potential difference.
2, the terminal resistance method: 485 + 485 in the last 485 and 485-connected 120 ohm termination resistor to improve the communication quality.
3, the middle section of the break method: by disconnecting from the middle to check whether the device is too much load too long communication distance of a device damage to the entire communication line and other reasons.
4, a separate pull line method: a simple simple to pull a line to the device, this can be used to exclude whether the wiring
caused a communication failure.
5, replace the converter method: carry a few converters, so you can rule out whether the converter quality problems affect the communication quality.
6, notebook debugging method: first to ensure that their own portable computer notebook is the communication of normal equipment, replace the customer computer, to communicate, if you can, that the customer's computer's serial port may be damaged.
Details Images