The 12-pin connector strip on the Dionex Inuvion IC System rear panel provides two relay outputs, two TTL outputs, and two TTL inputs (see the following figure).

Figure TTL and relay connector on rear panel

IMPORTANT

Relay loads exceeding 200 mA, or with included power supplies over 60 V, may damage CPU relay drivers.

NOTE

TTL 1 Input—Inject or Load applies only to the injection valve (not to the auxiliary valve, if installed).

The TTL outputs can be used to control functions in any installed external devices, such as an autosampler or another Dionex module. When connected to a peripheral device, the inputs can be programmed to perform the following Dionex Inuvion IC System functions:

  • Switch the injection valve position (load/inject)
  • Perform an autozero command (set the conductivity to zero)
  • Turn the pump on and off
  • NOTE

    Turning the pump on and off also turns the suppressor on and off. If the pump is turned off while the Dionex CR-TC (and the Dionex EGC current) are on, the Dionex CR-TC will automatically turn off to prevent damage.

  • Send a chart mark signal to the analog output (for example, to indicate the injection). The mark is 10% of the full-scale voltage and the duration is 0.5 second.

Relay outputs 1 and 2 can be programmed to switch any low-voltage control. Switched current must be less than 200 mA and 42 V peak.