Siemens Maxum II Reference Manual

IO Board Status LEDs
Each I
2
C-bus IO board has three status LEDs; a green Normal, a yellow Waning, and a red
Fault indicator. The Normal LED may flash to show active communication.
CAN Bus
I/O Boards
I
2
C Bus
I/O Board
CAN Bus
I/O Board LEDs
I
2
C Bus
I/O Board
LEDs
Figure 2-22 IO Board Status LEDs
In the illustration above, one I
2
C IO board is shown on the right. Two legacy CAN boards are
shown to the left. These boards have a number of additional status LEDs, described in the
section on
CAN IO Board Information.
IO Board DI Mode Switch
Switch SW1 located at the top of the board near the front (connector end) controls the mode
setting for the on-board digital inputs (DIs). The switch sets the mode for all DI circuits on the
board (mixing of modes on a board is not supported). The available options are Default/Sink
(Mode 2) and Legacy (Mode 1) A diagram is printed on the back of each board showing the
setting. The Legacy option is designed to adjust for a non-standard configuration that may be
in use on some systems. The Mode switch should be set to Mode 2 unless instructed differently
by Siemens.
Electronic Compartment Component Descriptions and Maintenance Procedures
2.4 Analog and Digital IO
Maxum II Reference Manual
Manual, 7/2017, 2000596-001 57

Siemens Maxum II Specifications

General

Category	Gas Chromatograph
Measurement Principle	Gas Chromatography
Communication Protocols	Modbus, Ethernet, Profibus
Operating Temperature	-20°C to 55°C
Power Supply	24 VDC or 100-240 VAC
Mounting	rack mount
Applications	Refinery, chemical, petrochemical, natural gas
Detectors	Thermal Conductivity Detector (TCD), Flame Ionization Detector (FID)
Sample Inlets	Multiple
Dimensions	Varies by configuration (e.g., 19" rack mount)