Thermo Scientific 410i Instruction Manual page 222

System Description
Electronics
Electronics
Motherboard
8-6 Model 410i Instruction Manual
All electronics operate from a universal switching supply, which is capable
of auto-sensing the input voltage and working over all specified operating
ranges.
Internal pumps and heaters all operate on 110VAC. An optional
transformer is required if operating on the 210-250VAC or 90-110VAC
ranges.
An on/off switch controls all power to the instrument, and is accessible on
the front panel.
The motherboard contains the main processor, power supplies, and a sub-
processor, and serves as the communication hub for the instrument. The
motherboard receives operator inputs from the front panel function keys
and/or over I/O connections on the rear panel. The motherboard sends
commands to the other boards to control the functions of the instrument
and to collect measurement and diagnostic information. The motherboard
outputs instrument status and measurement data to the graphics display
and to the rear-panel I/O. The motherboard also contains I/O circuitry and
the associated connector to monitor external digital status lines and to
output analog voltages that represent the measurement data. Connectors
located on the motherboard include:
External connectors:
External Accessory
●
RS-232/485 Communications (two connectors)
●
Ethernet Communications
●
I/O connector with Power Fail Relay, 16 Digital Inputs, and 6 Analog
●
Voltage Outputs.
Internal connectors:
Function Key Panel and Display
●
Measurement Interface Board
●
I/O Expansion Board
●
Digital Output Board
●
AC Distribution
●
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