Siemens 6GK7343-2AH11-0XA0 CP 343-2P

AS-Interface Master for S7-300 and ET 200M

The Siemens 6GK7343-2AH11-0XA0 serves as an AS-Interface master communications processor for the SIMATIC S7-300 PLC and ET 200M distributed I/O systems . This module connects the controller to the AS-Interface network, linking sensors and actuators at the field level . The compact design integrates seamlessly into the S7-300 modular system.

Key Technical Specifications

Parameter	Specification
Product Model	Siemens 6GK7343-2AH11-0XA0
Brand	Siemens
Category	AS-Interface Master / Communications Processor
Product Family	SIMATIC NET
AS-i Specification	V 3.0
Protection Class	IP20
AS-i Connection	S7-300 front plug (20-pin)
Power Supply	Via backplane bus
Current Consumption	200 mA (backplane), 100 mA (AS-i)
Power Loss	4 W
AS-i Cycle Time (31 slaves)	5 ms
AS-i Cycle Time (62 slaves)	10 ms
Max. AS-i Slaves	62 (with A/B technology)
Max. Digital Inputs	496
Max. Digital Outputs	496
LED Indicators	RUN, APF, CER, AUP, CM, SF
Width	40 mm
Height	125 mm
Depth	120 mm
Operating Temperature	0 to 60 °C
Storage Temperature	-40 to +70 °C
Relative Humidity	95% at 25 °C
Galvanic Isolation	Yes
Redundancy Support	Yes (with redundant IM153)

AS-Interface Communication and System Integration

The Siemens 6GK7343-2AH11-0XA0 supports the AS-Interface specification V 3.0, offering compatibility with the latest AS-i devices . It handles communication with up to 62 slaves using the A/B technology, enabling a larger network capacity . The module’s LED indicators provide clear visual feedback for network status, configuration errors, and voltage faults . It also supports analog value transmission, handling up to 31 analog slaves with 4 channels each . The AS-Interface network allows flexible topology choices, including line, star, and tree configurations .

Physical Design and Installation

The Siemens 6GK7343-2AH11-0XA0 features a 40 mm wide housing that matches the S7-300 form factor for space-saving installation . Users can configure the AS-i network through a front-panel button or via STEP 7 (V5.2 or higher) . The 20-pin front connector provides the interface for the AS-Interface cable . The module operates reliably across a wide temperature range, making it suitable for demanding industrial settings.