Metcom Solutions MCS301 User Manual

19 Inputs / Outputs Page 93 of 142
MCS301 meter - product Manual 1.25 MetCom Solutions GmbH
19.1.3 RS485 interface
The characteristic of the RS485 interface are listed below:
• Electrical characteristic: 24 - RT+ (Data+),
23 - RT- (Data-)
(Optional with GND)
• Protocol: DLMS/COSEM, half-duplex
• Baud rate: max. 19.200 / 38.400 baud
• Terminating resistor: The first and last device need to be terminated with 100 Ohm.
By using the RS485 interface up to 31 meters can be connected to an external modem with a
line length of 1000m. The used protocol corresponds to DLMS/COSEM.
Figure 21: Connection of MCS301 to a modem using the RS485 interface
The RS485 interface connection can be selected between:
• 2 terminals or
• RJ12 connector
19.1.4 RS232 interface
The characteristic of the RS232 interface are listed below:
• Electrical characteristic (3 terminals):
- Tx (Data+)
- Rx (Data-)
- GND
• Protocol: DLMS/COSEM, half-duplex
• Baud rate: max. 19.200 / 38.400 baud
By using the RS232 and RS485 interface the communication is no more simultaneously.
Data-
Data-
Data-
Data+ Data+ Data+
Data+
100 Ohm
Data-
HHU
PC
Modem
100 Ohm
390 Ohm
390 Ohm
-
+

Metcom Solutions MCS301 Specifications

General

Brand	Metcom Solutions
Model	MCS301
Category	Measuring Instruments
Language	English