System Description
I/O Components
8-10 Model 48i Instruction Manual Thermo Electron Corporation
I/O Components External I/O is driven from a generic bus that is capable of controlling the
following devices:
• Analog output (voltage and current)
• Analog input (voltage)
• Digital output (TTL levels)
• Digital input (TTL levels)
Note The instrument has spare solenoid valve drivers and I/O support for
future expansion.
Analog Voltage Outputs The instrument provides six analog voltage outputs. Each may be software
configured for any one of the following ranges, while maintaining a
minimum resolution of 12 bits:
• 0-100mV
• 0-1V
• 0-5V
• 0-10V
The user can calibrate each analog output zero and span point through
firmware. At least 5% of full-scale over and under range are also supported.
The analog outputs may be assigned to any measurement or diagnostic
channel with a user-defined range in the units of the selected parameter. The
voltage outputs are independent of the current outputs.
Analog Current Outputs
(Optional)
The optional I/O Expansion board includes six isolated current outputs.
These are software configured for any one of the following ranges, while
maintaining a minimum resolution of 11 bits:
• 0-20 mA
• 4-20 mA
The user can calibrate each analog output zero and span point through
firmware. At least 5% of full-scale over and under range are also supported.
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