Atlas PT Technical Manual
12
pack through a 5 pin POGO interface, 6 pins are used on the connector for ruggedness
and alignment but the middle pin in the bottom row is unused. This port is potted with a
sealant for waterproofing purposes and the SM has internal short-circuit protection but
can be damaged if an external voltage is applied to the wrong pins. Please use only
Raveon supplied assemblies for connection to this port.
4.5
Serial I/O Connector
The I/O connector is a LEMO B-Series 5-pin
circular waterproof
connector. It is used for
RS232 connection and for the DC input for the charger. This is a locking connector and
is released by simply pulling outward from the center of the connector.
The 5-pin I/O connector has the following pin-out:
Number
Function
Notes
1
Charger Input (DC-IN) 10-15VDC input for charging battery.
2
Internal Battery
Output
5-8.5V output, 200mA max current
draw. This line is switched and is only
on when specifically configured
3
GND
System Ground
4
TxD
Data into the SM. Also used as digital input
IN2 for exception reporting. GND or floating for
a 0, >3V for digital 1. If enabled for digital
inputs, the serial data entering this pin is
ignored (except in the command mode). Use
the TRIGBITS command to set which bits are
used as inputs.
5
RxD
Radio data output
P
in
1
Pin 1 Marker
Front view radio side
Front view cable side
