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Digital Inputs
Serial Ports
RS-232 Connection
Thermo Fisher Scientific
Sixteen digital inputs are available which may be programmed to signal
instrument modes and special conditions including:
Zero Gas Mode
●
Span Gas Mode
●
Set Background
●
Cal to low span
●
Cal to high span
●
Analog outputs to zero
●
Analog outputs to full scale
●
The actual use of these inputs will vary based on analyzer configuration.
The digital inputs are TTL level compatible and are pulled up within the
analyzer. The active state can be user defined in firmware.
Two serial ports allow daisy chaining so that multiple analyzers may be
linked using one PC serial port.
The standard bi-directional serial interface can be configured for either RS-
232 or RS-485. The serial baud rate is user selectable in firmware for
standard speeds from 1200 to 19,200 baud. The user can also set the data
bits, parity, and stop bits. The following protocols are supported:
C-Link
●
Streaming Data
●
Modbus Slave
●
Geysitech (Bayern-Hessen)
●
The Streaming Data protocol transmits user-selected measurement data via
the serial port in real-time for capture by a serial printer, data logger, or PC.
A null modem (crossed) cable is required when connecting the analyzer to
an IBM Compatible PC. However, a straight cable (one to one) may be
required when connecting the analyzer to other remote devices. As a
general rule, when the connector of the host remote device is female, a
straight cable is required and when the connector is male, a null modem
cable is required.
Data Format:
Model 43i Trace Level-Enhanced Instruction Manual
System Description
I/O Components
8-11
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Troubleshooting
