Bio-Rad BioLogic Signal Import Module (SIM) - Manual (Page 63)

2.9.6 Signal Import Module (SIM)
The Signal Import Module digitizes an analog signal and transmits it to the DuoFlow Controller. It is used to
import signals from non Bio-Rad detectors into the DuoFlow software.
• The SIM allows for connection of any pH probe and detector that outputs an analog signal between
-2.5 Volts to +2.5 Volts. Instruments that may be connected in this way could include a variable
wavelength UV detector, a refractive index detector, or a fluorescence detector.
• Two SIMs may be connected to a DuoFlow system.
Figure 2-29. Signal Import Module (front and rear views)
The output from a pH electrode is connected to the pH connector (a BNC connector) on the SIM; the output
from any other detector is connected at the 3-pin connector (+, -, gnd) of the SIM. The Automatic
Temperature Compensation (ATC) connector is reserved for future upgrades and enhancements.
The instrument bus cable connects the SIM to the USB Bitbus Communicator. (Refer to Figures 2-29 and
2-30.) If a second SIM is to be used, one of the instrument bus cables is used to connect the two SIMs. The
SIM is described in detail in its separate documentation. When a SIM is connected to the instrument bus,
the USB Bitbus device must be connected to an external powersource (see Section 2.1.2).
Figure 2-30. Cable Connections to the Signal Import Module
DEVICE
NUMBER
INSTRUMENT BUS POWER/
STATUS
TO USB BITBUS
COMMUNICATOR
TO USB BITBUS
COMMUNICATOR
CONNECTING A SINGLE SIM
CONNECTING TWO SIMs
DEVICE
NUMBER
INSTRUMENT BUS POWER/
STATUS DEVICE
NUMBER
INSTRUMENT BUS POWER/
STATUS
CONNECTION TO THE
FOLLOWING DEVICES
(LISTED IN SEQUENCE):
• MAXIMIZER (IF AVAILABLE)
• WORKSTATION
TO WORKSTATION
DEVICE
NUMBER
INSTRUMENT BUS POWER/
STATUS
ANALOG ATC pH
IN(+) IN(-) GND
DESCRIPTION OF SYSTEM COMPONENTS SYSTEM OVERVIEW
2-50