E485GP
RS485 light-isolated repeater Manual
E485GP is compatible with Siemens repeater 6 ES7 972-0AA01-0XA0, is
the high-speed isolated PROFIBUS repeaters designed for PROFIBUS
bus, applicable to all RS485 network such as the PROFIBUS network,
PPI network, MPI network, MODBUS network and Free Port
communication network. It can realize the signal isolation and
amplification. When the RS485 communication distance is over the
corresponding baud rate’s allowing, or nodes on the network are
more than the allowed number, you should use repeaters to amplify
the signal. The products have characteristics such as extending
communication distance, automatically switching the flow of signals
and automatically adaptation of baud rate. All their
industrial-grade devices are anti-static and anti-lightning, make
them work stably in the poor industrial environment.
When the number of nodes witch connected to the bus is more than 32
or of the connective cable between buses exceeds the maximum length
of cable(see table below), you need to use repeaters to amplify
signal.
Note 1
Baud rate | The maximum cable length of bus（m） |
9.6 to 187.5Kbps | 1000 |
500Kbps | 200 |
1.5Mbps | 100 |
Technical details
isolated voltage: 1000 VDC (up to 3000 VDC, statement is required
when ordering)
communication rate: 0 ~ 1.5 Mbps automatically adaptive
greatest distance: 2km (9.6 Kbps), 1500m(19.2 Kbps), 800m(187.5
Kbps), 200m(500 Kbps), 100m(1.5 Mbps)
Power: 24 VDC 1W DC power supply
protection of open-circuit, short-circuit and gap fault of bus
600 W built-in anti-lightning protection,15KV ESD (electrostatic)
protection
integrated terminal and bias resistors, data sending and receiving
indicator light
temperature: -40 ~ +85
Dimensions: 855525 (LWH), installation of standard rail
Weight: 100 g
Picture of working principle:
Products’ shape and definition of terminal signals:
Definition of the bus paragraph 1 and 2’s connection terminal
signal
Bus paragraph 1 connection terminal（left） | Bus paragraph 2 connection terminal（right） |
Signal-name | description | Signal-name | description |
A1 | Bus paragraph 1’s RS485 signal negative | A2 | Bus paragraph 2’s RS485 signal negative |
B1 | Bus paragraph 1’s RS485 signal positive | B2 | Bus paragraph 2’s RS485 signal positive |
FG | Chassis groundconnect the shielding layer of cable | FG | Chassis groundconnect the shielding layer of cable |
A1 | Bus paragraph 1’s RS485 signal negative | A2 | Bus paragraph 2’s RS485 signal negative |
B1 | Bus paragraph 1’s RS485 signal positive | B2 | Bus paragraph 2’s RS485 signal positive |
FG | Chassis groundconnect the shielding layer of cable | FG | Chassis groundconnect the shielding layer of cable |
+24V | External connect the anode of 24V DC power supply | | |
0V | External connect the cathode of 24V DC power supply | | |
Definition of programming device PG/OP socket（DB9F socket）signal
Pin number | Signal-name | description |
1 | ----- | ---- |
2 | M24V | 24Vground |
3 | RXD/TXD | Data wire B（RS485 signal positive） |
4 | ---- | ---- |
5 | M5V | Data reference potential（5V ground） |
6 | P5V | 5V power anode |
7 | P24V | 24V power anode |
8 | |
