6ES5247-5AA21 Digital Output Module - Siemens SIMATIC S5 PLC 24V DC I/O Unit

Siemens 6ES5247-5AA21

Siemens S5 I/O module

S5 24V DC module

6ES5247-5AA21

Siemens 6ES5247-5AA21 is a Siemens S5 I/O module with 24V DC operation, designed for industrial automation systems. It ensures reliable signal processing and seamless integration in Siemens S5 setups, supporting efficient control and communication.

Specification

SEODescription

The Siemens 6ES5247-5AA21 is a robust Siemens S5 I/O module designed for industrial automation systems, functioning as a 24V DC digital input/output module. It provides 16 digital input channels and 16 digital output channels, enabling seamless integration with sensors, actuators, and other peripherals. Compatible with Siemens S5 PLC systems, this module supports direct connection to up to 8 expansion units, enhancing system scalability. Operating within a 24V DC voltage range (20.4–28.8V) and a temperature range of 0–60°C, it ensures reliability in harsh industrial environments such as manufacturing, process control, and machinery automation. Its key advantages include high noise immunity, modular design for easy maintenance, and compatibility with legacy S5 architectures. However, it lacks support for modern communication protocols like PROFINET, limiting its use in advanced networked systems. This S5 24V DC module remains a cost-effective solution for upgrading or maintaining existing Siemens S5-based installations.

SEOSpecification

Parameter	Specification
Manufacturer & Model	Siemens 6ES5247-5AA21
Module Type	Siemens S5 I/O module (Digital Input)
Input Channels	16-channel
Supply Voltage	24V DC ±15%
Input Current	Typically 7mA per channel
Isolation	Optoelectronic isolation between field/control circuits
Response Time	≤ 5ms
Connection Type	Screw terminal connection
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +70°C
Protection Class	IP20
Certification	UL, CSA, CE
Dimensions (WxHxD)	60 x 125 x 117 mm
Weight	Approx. 500g
Compatibility	Siemens S5-100U/115U/135U PLC systems

SEOQandA

question:What happens if a refurbished product malfunctions during use?
answer:We provide a replacement or refund upon confirming it's refurbished. Contact support with proof for resolution.
question:Why was the product received with removed labels?
answer:Labels are removed to protect supplier confidentiality, complying with brand agreements. Quality remains unaffected.
question:How are warranty claims handled for refurbished items?
answer:Warranty applies if terms are met. Submit proof of purchase and issue details for assessment.

SEOQandA_Product

question:Module not detected by PLC; communication failure?
answer:Verify bus wiring, address configuration, and terminal resistor. Ensure correct STEP 5 hardware configuration.
question:Input signals erratic or unresponsive?
answer:Check input voltage (24VDC), sensor functionality, and wiring. Confirm common terminal (M) is properly connected.
question:Power LED off; module unresponsive?
answer:Test power supply for stable 24VDC. Inspect fuses and replace if blown. Ensure backplane contact is secure.
question:Outputs fail to activate connected devices?
answer:Validate load compatibility (≤0.5A/channel). Check output wiring and external fuses. Test with diagnostic LEDs.
question:Module overheats during operation?
answer:Maintain ambient temperature ≤55°C. Ensure adequate airflow. Verify total output current stays below 4A.