Description:
Transmission rate
The HFD-FO-MB Series Modbus fiber optic converters support all the transmission speeds between 0 ~ 115.2Kbbps.The transmission rate is set automatically as soon as the HFD receives a frame. The HFD system is a high transparent low-latency transmission system, this system in many aspects has excellent performance.The fiber-optic repeater HFD supports the any rate.
Signal regeneration
The modules regenerate the signal form and amplitude of the data received. This allows up to 200 HFD Modbus converter to be cascaded.
Segment monitoring at the RS 232 port
Each receiver monitors the RS 232 bus segment connected to it for faulty frames or continuously busy networks. If faulty frames are received by the receiver, or if the network is busy for longer than the maximum permitted send time, forwarding of the received signals is blocked until frames can be received again correctly.
Segment monitoring at the optical line
Each receiver monitors the optical line port connected to it for recive framesand status. If faulty frames are received by the receiver, or no single for longer than the maximum permitted time, forwarding of the received signals is blocked until the port status is ok,frames can be received again correctly.
Network Topologies
The following network topologies can be realized with the HFD Modbus optical converter:
- Point-to-point topology
- Multi-drop BUS topology
- Star topology
- Redundant ring(DSHR)
Combinations of these basic types are also possible. Lines with two optical fibers are used to create the fiber links for these network topologies.If a malfunction – e.g. a break in a fiber line – makes a high degree of field bus network fail-safety necessary, the availability of the network can be increased using a redundant network configuration.
Line topology
In a line structure, the individual RS232 HFDs are connected together by dual-fiber optical fibers. Modules with one optical port are sufficient at the beginning and end of a line, between which modules with two optical ports are necessary.
If single point-to-point connections are to be built up, this can be achieved using two modules each with one optical port.
Star topology
Several modules are combined to form an active RS232 star coupler. Other modules are connected to this by dual-fiber optical fiber lines. The modules of the star coupler are connected to
one another via the electrical port(electrical star segment).All HFD types for different fiber types can be combined using the electrical star segment.
Modules with one or two optical ports can be used to create an active RS232 star coupler. Modules with one optical port are sufficient for connecting a terminal or an RS 232 bus segment to the active star coupler.
Redundant optical ring
This network topology represents a special form of line topology. A high degree of network operating safety is achieved by ”closing“ the optical line. A redundant optical ring can only be realized with modules with two optical ports of the same type.
An interruption of one or both optical fibers between two modules is detected by the HFD and the ring is transformed into an optical line.If one module fails only those terminals connected to this module or the RS 232 segment are uncoupled from the ring. The remainder of the network itself continues to function as a line. The error is indicated by the LEDs on the two HFD connected to the malfunctioning optical fiber and their signaling contacts. The segmentation is lifted automatically as soon as both modules recognize that the segmented field bus network is functioning correctly with the test frames.
Voltage/power supply |
5V/12V/24 DC |
Operating voltage |
12 V to 30 V DC, typ. 24 V, |
Current consumption |
typ. 120 mA@24V |
Signaling contact |
Max .switch DC24V@2A or AC125@0.2A |
Signal transmission |
|
Transmission rate |
0 – 115.2Kbps |
Setting transmission rate |
Automatic |
Bit error rate |
< 10-9 |
Transmission principle |
Transparent transmission |
Delay time (Electrical port) |
≤2us/Port |
Delay(Opticale Fiber Port) |
≤1.6us/Station |
Retimer (Electrical port) |
|
Input |
High speed sampling transmission |
Single type |
NO protocol type |
Output |
Signal distortion < 10ns |
|
Edge jitter is less than15ns |
Electrical port |
|
Input/output signal |
RS 232 level DB9 Connector |
PIN assignment |
5-PIN terminal block |
Bus properties(All Segments and Fibles) |
|
The equivalent bus |
Yes |
support for single master system |
Yes |
supports multiple master system |
Yes |
The master station Position |
Can be placed on any node |
Optical ports |
|
Wavelength |
SM: 1310 nm, MM: 850 nm |
optical power |
|
– in glass fiber 9/125um |
-9dBm – -18 dBm |
– in glass fiber G 62.5/125 |
-13 dBm – -20 dBm |
Receiver sensitivity |
-34dBm |
Transmission distance |
|
–with glass fiber 9/125um |
0 – 20,000 m (0.3 dB/km) |
– with glass fiber G 62,5/125 |
0 – 3,000 m (2.0 dB/km) |
Connector |
ST/FC/SC, ST as the standard |
Electromagnetic compatibility (EMC) |
|
Limit class B (EN 55022) |
EN 61000-4-2
EN 61000-4-3 |
Burst: |
|
On power supply lines
shielded RS 232 bus lines
|
±2 kV (EN 61000-4-4) |
Surge |
|
Power lines,Shielded RS 232 lines |
±1 kV symmetrical,±2 kV asymmetrical (EN 61000-4-5)
|
Others |
|
Ambient temperature |
-25 °C to +75 °C |
Storage temperature |
40 °C to +85 °C |
Relative humidity |
<95 %, non-condensing |
Protection class |
IP 40 |
Dimensions (H x W x D) |
120 x 40 x 92 mm |
Weight |
approx. 600 g |
Model Selection:
Model Number
|
Description
|
Fiber No.
|
Fiber Mode
|
Fiber Connector
|
HFD-FO-MB2-P1M
|
Point to Point Link,Single Fiber(BI-DI), 2km
|
1
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-P2M
|
Point to Point Link,Dual Fiber, 2km
|
2
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-P1S
|
Point to Point Link,Single Fiber(BI-DI), 20km
|
1
|
Single Mode
|
ST/SC/FC
|
HFD-FO-MB2-P2S
|
Point to Point Link,Dual Fiber, 20km
|
2
|
Single Mode
|
ST/SC/FC
|
|
|
|
|
|
HFD-FO-MB2-M2M
|
Multi Point Bus Link,Dual Fiber(BI-DI), 2km
|
2
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-M4M
|
Multi Point Bus Link,4 Fiber, 2km
|
4
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-M2S
|
Multi Point Bus Link,Dual Fiber(BI-DI), 20km
|
2
|
Single Mode
|
ST/SC/FC
|
HFD-FO-MB2-M4S
|
Multi Point Bus Link,4 Fiber, 20km
|
4
|
Single Mode
|
ST/SC/FC
|
|
|
|
|
|
HFD-FO-MB2-R2M
|
Redundant Ring Link,Dual Fiber(BI-DI), 2km
|
2
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-R4M
|
Redundant Ring Link,4 Fiber, 2km
|
4
|
Multi Mode
|
ST/SC/FC
|
HFD-FO-MB2-R2S
|
Redundant Ring,Dual Fiber(BI-DI), 20km
|
2
|
Single Mode
|
ST/SC/FC
|
HFD-FO-MB2-R4S
|
Redundant Ring,4 Fiber, 20km
|
4
|
Single Mode
|
ST/SC/FC
|