Elster EK280 - 3.8 Interfaces

26 Technical data
3.8 Interfaces
3.8.1 Serial optical interface
Data
Value
Unit
Baud rate
9600
Bd
Format
1 start bit, 1 parity bit, 1 stop bit
3.8.2 Serial electrical interface
Data
Value
Adjustable types
RS232 or RS485
3.8.2.1 Technical Data of the RS485 Interface
Data
Value
Operating modes
RS485 2-wire (half-duplex)
RS485 4-wire (full-duplex)
Termination
Do not use a termination resistor at any de-
vice connected
Maximal data transfer rate
19.200 Baud
Number of devices con-
nected to the bus
max. 16 unit loads
1
Power consumption at the input
2
:
- 6 unit loads (RS485, not electr. insulated)
- 3 unit loads (RS485, electrically insulated)
3.8.3 Integrated modem
Data
Value
Unit
Modem type
2G: GSM / GPRS
3G: GSM / GPRS / UMTS
Frequency bands
2G: 850 /900 /1800 /1900
3G: 850 /900 /1800 /1900 /2100
MHz
1
Unit Load: Standard-RS-485 Receiver mit einem Eingangswiderstand = 12kOhm
2
Details zum Anschluss der RS485-Schnittstelle s. Applikationshandbuch