Siemens Maxum II Reference Manual

Replacing A CAC3
The CAC3 memory content depends on backup-battery voltage from the SIB3. When the CAC3
is removed from the SIB3, the memory content is lost. Observe safe ESD handling procedures.
1. Disconnect the ethernet cable from the CAC3 board.
2. Remove the two 2mm screws and o-rings as shown in the illustration below. Early SIB3s
had threaded studs, with two nuts with o-rings.
3. Remove the CAC3 by gently pulling it straight up. Avoid rocking or tilting motions.
Electronic Compartment Component Descriptions and Maintenance Procedures
2.3 System Controller Version 2.1 (SYSCON2.1)
Maxum II Reference Manual
Manual, 7/2017, 2000596-001 49

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)