USGlobalsat BU-353-S4 V1.0 (Mac) - Manual (Page 15)

BR-355S4
PIN Number(s) Name Type Description
1 GND P Ground.
2 VCC P Main power supply to the BR-355.
3,6 NC Reverse PIN
4 RX I
This is the main receive channel for receiving
software commands to the engine board from
SiRFdemo software or from user written
software.
5 TX O
This is the main transmits channel for outputting
navigation and measurement data to user’s
navigation software or user written software.
LED RED
LED OFF: Receiver switch off
LED ON: Receiver switch on
No fixed, Signal searching
LED Flashing: Position Fixed