Functional Description
MEN Mikro Elektronik GmbH
36
20BC50R00 E1 – 2015-09-07
3.8
Serial Interfaces
3.8.1
RS232 Interface
The BC50R provides two isolated RS232 interfaces with a baud rate of up to 115.2
kbaud. They have an isolation of 500VDC to power and shield, both COM1 and
COM2 have the same isolation group
.
The activity of the COM interfaces is
signaled via two LEDs at the front panel.
Connector types
• 5-pin M12 receptacle, female, A-coded 90° (Phoenix Contact SACC-CI-M12FS-
5CON-L90 SCO - 1436644)
• Mating connector:
5-pin M12 plug, male
Table 10.
Pin assignment of RS232 front-panel connectors
Table 11.
Signal mnemonics of RS232 connector
1
COM1_TXD
2
COM2_TXD
3
GND
4
COM2_RXD
5
COM1_RXD
Signal
Direction
Function
GND
-
Ground
+5V
out
+5V supply voltage
RXD
in
Receive data
TXD
out
Transmit data
2
4
1
3
5
