Thermo Scientific Dionex ICS-1100, Operator'S Manual

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Dionex ICS-1100 Ion Chromatography System
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Doc. 065289-03 10/12
B.2 Controlling TTL and Relay Outputs
The Dionex ICS-1100 provides two TTL outputs and two relay contacts for
control of functions in external devices, such as an integrator or autosampler. The
relay outputs can be used to switch any low-voltage control. Switched current
must be less than 200 mA and 60 V peak blocking. The relay-contact closures are
normally open. When the relay is closed, current flows to the connected device.
The TTL outputs are normally at 5 volts. Setting a TTL output to 0 volts turns on
the action in the connected device.
The TTL and relay output states can be controlled, either by issuing direct control
commands from the Chromeleon Control panel or by including the commands in a
control program.
Relay loads in excess of 200 mA or with included power supplies over
60 V may damage the relay drivers on the CPU.