Table of Contents
Advertisement
28
4.8
Electrical serial interface
Information
Adjustable types
Cable length
4.8.1 RS485 type
Parameter
Operating types
Scheduling
Maximum data transmission rate
Number of bus participants
Cable length
The complete description for bus operation using Modbus is provided in the EK205-
M application manual.
4.9
Supported protocols
Transmission method
Optical
Serial (RS232, RS485)
Via modem
Use secure version of a protocol!
The protocols used with the EK280 normally transfer the data in plain text form. If
possible, use the secure version of a protocol.
Please take our recommendations in the following sections into account:
2.3 "Preventing unauthorized external access using a firewall"
2.4.2 "Data security for data in transit"
Unit load: Standard RS485 receiver with an input resistance = 12 kOhm
1
Details on the connection of the RS485 interface, see application manual
2
Value
RS232 or RS485
max. 10 m
Value
RS485 2-wire (semi-duplex)
RS485 4-wire (full-duplex)
No load resistor usable in the connected bus participants
19,200 baud
Drive performance at the outlet: max. 16 unit loads
Received power at the input
- 6 unit loads (RS485, not electr. insulated)
- 3 unit loads (RS485, electr. separated)
max. 10 m
Application protocols
IEC 62056-21
IEC 62056-21, Modbus (ASCII, RTU, TCP)
IEC 62056-21, Modbus (ASCII, RTU, TCP)
Technical data
2
:
1
Advertisement
Table of Contents
