Download Operation Manual for the SAS

SYSTEM
SAS
SECTION
A. OVERVIEW
12 V
SatNet
4-20 mA
SatNet
24 V
RS-232
12 VDC
Figure A-2 SAS Block Diagram – 48V/Duplex RS-422 Power/Telemetry Configuration
The sensors located on the SAS mounting frame output serial data to the
Junction Box. Using the Satlantic instrument network protocol, SatNet,
the data streams are merged and transmitted on the power/telemetry
cable to the MDU. The MDU converts the telemetry from RS-422 to RS232 and transmits it to the data logging computer.
One of the sensors, usually the THS, is configured as the SatNet master
and is connected to a dedicated port on the Junction Box. The other
sensors are configured as SatNet slaves.
Telemetry from slave
instruments to the data logging computer and commands from the
computer to the slave instruments go through the SatNet master.
The serial communication formats for Satlantic instruments are duplex
RS-232, RS-422 transmit, and duplex RS-485 for SatNet communication.
The identical data content is transmitted on each signal format.
Simplified SAS configurations are possible for systems where the data
logging computer and power supply are located near the SAS
instruments. In such cases, the Junction Box and MDU are optional.
Revision: B
Document: SAT-DN-545
- Copyright © 2010 by Satlantic -
Page: A-3