Siemens Maxum II Reference Manual

2.3.4 Maintenance Overview
Board Replacement
A failure in the SYSCON2.1 will generally interrupt communication between the GCP
networkbased software and the detectors. A simplified view of the system is shown below.
CAC3
CAN
RS485
RS232
Digital Communication
DC Supply
AC Supply
Analyzers
GCP
Ethernet
Ethernet
Switch
(optional)
I/O
Boards
(I
2
C)
120/240VAC
120/240VAC
120/240VAC
24VDC
Heaters
24 V
Supply
PECM
SSR
Board
24VDC
24VDC
I
2
C
24VDC
I
2
C
24VDC
EPCs
SVCMs
Ethernet
I
2
C
I
2
C
GCP
Color
Touch
Display
SYSCON
(SIB3)
PECM
Controller
Board
DPMs
Figure 2-19 Power Distribution and Communication Paths
Most problems can be resolved by checking interconnects between cable, boards, and
connectors. If a component must be replaced, the following sections give detailed procedures.
Remote Database Backup
Because these procedures separate the CAC3 memory from the backup-battery voltage on
the SIB3, the database must be backed up to a workstation on the network or directly
connected.
2.3.5 Service Procedures
Preparing to Replace A Component
The analyzer must be shut down using the General Analyzer Shutdown Procedure in the
Maxum Edition II Analyzer General Maintenance Manual.
Electronic Compartment Component Descriptions and Maintenance Procedures
2.3 System Controller Version 2.1 (SYSCON2.1)
Maxum II Reference Manual
48 Manual, 7/2017, 2000596-001

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)