SCC Signal Conditioning Device Considerations

The following section applies only to analog input (AI) SCC modules.

In a single stage AI SCC configuration, you connect your external signal to an SCC module which conditions the signal and passes it to the DAQ device. You can install single stage AI modules in sockets J1-J8 in the SC-2345 carrier.

Sometimes, you can cascade two AI SCC modules together on a single AI channel to form a dual-stage configuration. In this configuration, you connect the external signal to the first-stage AI module, which conditions the signal and passes it to the second-stage AI module. Then, the signal is passed to the DAQ device. First-stage of dual-stage AI modules can be located in sockets J9-J16. Second-stage of dual-stage AI modules can be located in sockets J1-J8.

An example of a dual-stage configuration is a voltage attenuator module (SCC-A10) in the first-stage SCC slot followed by a lowpass filter module (SCC-LP01) in the second-stage SCC slot to create a combined attenuator and lowpass filter signal conditioning on the specified AI channel. The following table shows all the SCC devices that support dual-stage configuration.

SCC Module	Single Stage AI (J1-J8)	First-Stage of Dual-Stage AI (J9-J16)	Second-Stage of Dual-Stage AI (J1-J8)
SCC-AI Series	Yes	Yes	No
SCC-A10	Yes	Yes	No
SCC-RTD01	Yes	Yes	No
SCC-CI20	Yes	Yes	No
SCC-ACC01	Yes	Yes	No
SCC-TC Series	Yes	Yes	No
SCC-FV01	Yes	No	Yes
SCC-LP Series	Yes	Yes	Yes
SCC-FT01	Yes	Yes	Yes
SCC-SG Series	Yes	Yes	No

SCC modules that are not listed in the table above do not support dual-stage configuration. This includes all analog output, digital input, and digital output SCC modules.