Chapter 5 Detailed Descriptions of I/O Modules
GFK-2958E
RSTi-EP User Manual
210
Connection Cables for the Serial Device
Use shielded cables, because electromagnetic interferences from the surroundings have to be
assumed. The maximum permissable cable length depends on the cable capacitance and the baud
rate.
Connecting a RS232 Device
Maximum Cable Length RS232
Cable Capacitance
Maximum Cable Length
≤
2500 pF
15 m (49 ft), shielded
55 pF/m
45 m (147 ft)
Connecting a RS485 or RS 422 Device
The serial device has to be connected using a twisted pair cable (U/UTP, Type Cat- 3 or J-2YY-
2x2x0,6).
Maximum Cable Length RS422/485
Baud Rate in kbps
Maximum Cable Length
≤ 19200
1200 m (3937 ft), shielded
38400
500 m (1640 ft)
57600
250 m (820 ft)
115200
200 m (656 ft)
•
RS485: Use one core pair for Data+/Data
–
. You can use any wire for the ground singal GND
COM. The remaining free wires should be connected to ground.
•
RS422: Connect the wires for transmitting signals TXD+/TXD
–
and those for receiving signals
RXD+/RXD
–
in pairs respectively. You can use any wire for the ground singal GND COM. The
remaining free wires should be connected to ground.
Summary of Contents for GFK-2958E
Page 1: ...RSTi EP User Manual GFK 2958E November 2017 ...
Page 23: ...Chapter 1 Introduction GFK 2958E RSTi EP User Manual 19 Notes ...
Page 56: ...Chapter 3 Configuration GFK 2958E RSTi EP User Manual 52 Notes ...
Page 183: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 179 EP 5111 ...
Page 184: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 180 EP 5111 ...
Page 316: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 312 Notes ...
Page 330: ...Chapter 6 Installation GFK 2958E RSTi EP User Manual 326 Notes ...
Page 344: ...Chapter 7 Earthing and Shielding GFK 2958E RSTi EP User Manual 340 ...
Page 345: ...Chapter 7 Earthing and Shielding GFK 2958E RSTi EP User Manual 341 Notes ...
Page 385: ...Chapter 8 Web Server GFK 2958E RSTi EP User Manual 381 Notes ...
Page 401: ...Chapter 11 Disassembly and Disposal GFK 2958E RSTi EP User Manual 397 Notes ...
Page 413: ...Chapter 12 LED Indicators and Troubleshooting GFK 2958E RSTi EP User Manual 409 Notes ...
Page 416: ...Chapter 14Accessories and Replacement Parts GFK 2958E RSTi EP User Manual 412 Notes ...