Other I/O Expansion Options
Communication Expansion Option
5-4 AutoPILOT PRO Flow Computer User Guide
Thermo Fisher Scientific
Each analog input provides transmitter power (XPWR) at a n12 V
that power cycles with the unit, a transmitter signal input (IN), and a
transmitter power return (AGND). The analog inputs on the AI expansion
board are identified in the following table.
Table 5–1. Analog inputs on the AI expansion board
Input
In
AGND
XPWR
AI1
TB1-1
TB1-2
TB1-3
AI2
TB2-1
TB2-2
TB2-3
AI3
TB3-1
TB3-2
TB3-3
AI4
TB4-1
TB4-2
TB4-3
Figure 5–4. Typical wiring for AI terminal board
The communication expansion option consists of one communication
expansion board and up to four communication terminal boards. The
communication expansion board adds eight RS232/RS485 ports and two
USB ports. Each communication terminal board adds two RS232/RS485
ports.
In RS232 mode, the ports on the communication expansion board support
TX, RX, RTS, CTS, DCD, and GND signals and baud rates up to 57600
bps. RTS/CTS flow control is supported.
In RS485 mode, the ports on the communication expansion board can be
configured as full or half-duplex using jumpers. Supported RS485 signals
are TX+/TX- and RX+/RX- pair. Baud rates up to 57600 bps are
supported.
Power to the communication expansion board is controlled by the main
board by sensing the DCD activity of each serial port. The board is
powered down or turned off if DCD is not present.
Analog Inputs
Communication
Expansion Option
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