Siemens C98043-A7002-L1-13 and C98040-A7002-C1-6 Printed Circuit Boards for Industrial Control

The Siemens C98043-A7002-L1-13 and C98040-A7002-C1-6 are printed circuit boards designed for use in Siemens Simatic controllers and drive systems. These PCBs serve as critical components for signal processing, power distribution, and communication within industrial automation equipment. They are manufactured to Siemens’ high reliability standards for continuous operation in factory environments.

C98043-A7002-L1-13 Technical Overview

The C98043-A7002-L1-13 is a multilayer PCB typically used in Siemens Simatic S5 or S7 control systems, or in drive control units such as Simovert or Masterdrives. The board features extensive surface-mount components, including logic gates, voltage regulators, and interface connectors. It operates on standard industrial voltages derived from the backplane or external power supply. The PCB is designed for easy insertion into a card cage or rack with 96-pin DIN 41612 connectors.

C98040-A7002-C1-6 Technical Overview

The C98040-A7002-C1-6 is a related PCB variant often used in power supply or communication sections of Siemens automation systems. It includes analog and digital circuitry, with dedicated test points and jumpers for configuration. This board is known for its robust construction with conformal coating to protect against dust, moisture, and chemical exposure typical in industrial control cabinets. Both boards are designed to operate within a temperature range of 0°C to 60°C.

Electrical and Functional Specifications

These printed circuit boards are populated with high-grade electronic components. Typical power supply voltage is 5V DC and 24V DC derived from the host system backplane. Current consumption depends on the specific board population but generally ranges from 200mA to 500mA at 5V. The boards include LED indicators for power and status, accessible from the front panel when mounted. Communication interfaces include 8-bit or 16-bit parallel data bus and onboard serial drivers for RS-232 or RS-485.

Application in Siemens Systems

The C98043-A7002-L1-13 and C98040-A7002-C1-6 are typically found as part of Simatic S5-115U, S5-135U, or S5-155U programmable controllers, as well as in SIMOREG DC drives and SIMOVERT AC drives. They function as central processing boards, communication processors, or I/O interface cards. In a typical configuration, the boards are installed in a card rack with passive backplane, receiving address and data signals from the main CPU board. Their primary role is to process sensor inputs or generate control outputs for motors, valves, and actuators.

Board Form Factor and Connections

Both boards conform to the Eurocard standard, measuring 100mm x 160mm (single height Eurocard). They use a 96-pin DIN 41612 male connector (type C) for plugging into the backplane. A front panel with extractor handles provides access to status LEDs, test points, and configuration switches. The boards are designed to be replaced without soldering, using standard electromechanical connections. An anti-static bag is recommended for storage.

Environmental and Certification

The boards are designed for pollution degree 2 environments (non-conductive pollution only). They meet IEC 61131-2 standards for industrial control equipment. Operating humidity: 5% to 95% non-condensing. The PCBs are RoHS compliant, manufactured with lead-free solder and components where applicable. They are CE marked for electrical safety and electromagnetic compatibility. Vibration resistance: 2g at 10-57Hz, shock resistance 15g for 11ms.

Maintenance and Troubleshooting

Periodic visual inspection for component damage, capacitor leakage, or corrosion is recommended. Diagnostic LEDs on the front panel indicate board power (green) and error status (red). Common failure modes include electrolytic capacitor aging, battery backup circuit failure, and connector oxidation. Replacement of the board must be done with the system powered off to prevent damage. Firmware is typically stored in EPROM or flash memory on the board; field updates require a programmer.

Compatibility and Successor Products

These boards are compatible with legacy Siemens automation systems. For modern replacements, Siemens offers retrofit kits using S7-1500 or SINAMICS drive components. However, many older systems continue to operate reliably with original C98043 and C98040 boards. Spare parts are available through Siemens industrial spare parts channels. Cross-references include 6ES5, 6SC, and 6SE series components. Engineering drawings and circuit diagrams can be requested from Siemens documentation under the respective drive or PLC manuals.

Applications

Typical applications include legacy control systems in steel mills, paper machines, cement plants, automotive assembly lines, and water treatment facilities. The boards are also found in test stands, machine tool controllers, and HVAC central plants. Their long lifecycle makes them valuable for maintaining production uptime without a full control system migration.

Storage and Handling

Store in original anti-static packaging in a dry environment between 0°C and 40°C. Handle by edges only to avoid electrostatic discharge damage. Avoid flexing the board to prevent cracked solder joints. Prior to installation, inspect for bent pins on the DIN connector and for any visible component damage.

Conclusion

The Siemens C98043-A7002-L1-13 and C98040-A7002-C1-6 printed circuit boards are reliable components for Simatic and drive systems. Their robust construction and standardized Eurocard format ensure continued support for legacy automation systems in critical industrial applications.