SYSTEM LAYOUT
ROBD2 USER’S GUIDE SEPTEMBER 2016
5
Power Input
The power entry module supplies AC power to the internal power supplies. The
internal power supplies convert and regulate the AC signal to the five DC voltages
required by the system electronics. The power entry module has integrated EMI/RFI
filtration and switch one or both hot lines dependent upon 110 or 220 VAC operation.
The power entry module also has two replaceable fuses.
Gas Inputs
These gas inputs supply source gas to the system components. The optional quick
connect fittings for these ports are colored and keyed. The Nitrogen input is black,
the Air input is yellow and the oxygen input is green. The Nitrogen and air inputs
should be pressurized to a dynamic pressure of 40 PSIG and the oxygen input
should be adjusted to a dynamic pressure of 20 PSIG.
RS-232 Port
One 9-pin RS-232 serial port is connected to the embedded controller of the ROBD
system. This port is used for remote control of the ROBD2 using a host computer
and communications software. Communication protocol is provided in the
programming and technical guide. This protocol can be used to develop control and
data collection programs using programs such as National Instruments’ LabVIEW.
Cooling fan
The cooling fan moves approximately 36 cu/ft per minute of filtered air through the
ROBD chassis and out the cooling vents on the top cover of the chassis. The cooling
fan should not be obstructed.
Service port
The service port is used for factory calibration of the thermal mass flow
controllers.
Important: The silver plug must not be removed during normal operation.
Pulse oximeter probe connector
Plug the pulse oximeter probe into this port. Once connected the probe is
latched. The probe is removed, by pressing the side tabs on the probe connector
and pulling it out.
