Bio-Rad ChromLab™ Software - Manual (Page 106)

3 | Preparing the Instrument
104 | NGC Chromatography Systems and ChromLab Software
Connecting External Devices to the NGC Instrument
Tip: If you do not plan to connect the C-96 autosampler or other external
devices to the NGC instrument you can skip this section.
This section explains how to connect the signal import module (SIM) to the NGC
instrument, and how to connect external devices to the SIM.
 For information about connecting the C-96 autosampler to the SIM, see
Appendix D, Connecting the C-96 Autosampler to NGC Systems on
page 289 .
 For information about connecting the SIM to an NGC instrument, see
Connecting the SIM to the NGC Instrument on page 105 .
 For information about connecting an external device to the SIM, see
Connecting External Devices to the SIM on page 107 . Next, see the
chapter System Controls in the NGC Chromatography Systems and
ChromLab Software User Guide to enable the external device.
 For information about installing and setting up an external device, see its
installation documentation.
Controlling Programmed Functions via
Transistor-to-Transistor Logic
You can control a function of an external device or receive function information from
a device via the SIM. Using the SIM’s transistor-to-transistor logic (TTL), the NGC
instrument can mark when a function occurred on an external device through the
SIM’s DIGITAL IN port, or send commands to an external device through its DIGITAL
OUT port.
For example, you can connect a C-96 autosampler to the SIM enabling NGC
systems to provide automated, accurate, and reproducible sample injections.
Connecting the autosampler to the SIM’s DIGITAL OUT and DIGITAL IN ports
enables the NGC instrument to inform the autosampler when to begin its injection
cycle and to mark when the autosampler injects a sample.