Cortalk RMU5 Generic - Communications Expansion Connector Pinout

MOBILTEX® DATA LTD.
TITLE:
RMU5 Generic Installation and Configuration Guide
Calgary, Alberta
DOCUMENT NO.:
RMU5-MAN-001
SHEET:
62 of 69
REV:
1.10
Pin Number
Label
Function
1
COMM_DCD
RS-232 Communications Port Data Carrier
Detect (DTE)
2
COMM_RXD_B
RS-232 Communications Port Receive Data
(DTE)
3
COMM_TXD_B
RS-232 Communications Port Transmit Data
(DTE)
4
COMM_DTR
RS-232 Communications Port Data Terminal
Ready (DTE)
5
GND
Power/Signal Ground
6
COMM_RS485+
RS-485 Communications Port Positive Data
(Shared With Main I/O RS-485 Connections)
7
COMM+V
Rectified Input Voltage If External Power
Is Present, Otherwise Switched Internal
Backup Battery (2.5A max)
8
SDA
I2C Bus Data Line
9
COMM_DSR
RS-232 Communications Port Data Set Ready
(DTE)
10
COMM_RTS
RS-232 Communications Port Request To Send
(DTE)
11
COMM_CTS
RS-232 Communications Port Clear To Send
(DTE)
12
COMM_RI
RS-232 Communications Port Ring Indication
(DTE)
13
COMM_RS485-
RS-485 Communications Port Negative Data
(Shared With Main I/O RS-485 Connections)
14
COMM+5V
+5V Supply For Communication Peripheral (2A
max)
15
SCL
I2C Bus Clock Line
Table 4 Communications Expansion Connector Pinout