ThermoFisher Scientific 146iQ, Instruction Manual

Page: 271 / 302

Optional Equipment
Connecting External Devices
Thermo Scientific 146iQ Instruction Manual 9-11
The digital I/O board consists of:
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16 Digital Inputs (18 pin connector)
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10 Digital Relay Switches (20 pin connector)
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8 Valve Driver Outputs (16 pin connector)
The digital inputs are TTL (3 V or 5 V) compatible and are pulled high
within the instrument. The active state can be user defined in firmware.
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Logic Low Threshold: 0.8 V
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Logic High Threshold: 2.0 V
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Absolute allowable input voltages: -0.5 to 5.5 V
Figure 9–6. Digital Inputs
Digital I/O Board
Digital Inputs