General
Frequency range	125 kHz
Transponder encoding	EM4102
Interrogation distance	20 cm
Interfaces	RS232, Wiegand
Magnetic stripe reader	MSR ABA Track 2
Cable type	Open cable end
Construction type	with frame
Colour	Dark grey

The RFID reader GP20N-10D from Promag is a compact, industrial-grade device for contactless identification of transponders in the 125 kHz frequency range. It is specifically designed for applications in access control, time and attendance management, and logistics. The device operates with the transponder encoding EM4102 and enables contactless reading at a distance of up to 20 cm, with the actual reading distance depending on the type of transponder used and environmental conditions. The reader features an integrated frame that allows for robust mounting on doors, switches, or other surfaces, and is finished in dark grey, making it suitable for use in office and industrial environments.

Applications
This device is suitable for use in entry and exit control systems, such as in office buildings, factories, or warehouses, where fast and reliable user identification is required. It can be integrated into systems based on RFID technology and also supports reading of magnetic stripe cards in the MSR ABA Track 2 format. This expands application possibilities, as both RFID transponders and magnetic stripe cards can be read at a single device, increasing flexibility in the selection of identification media.

Functions and Equipment in Detail
The reader offers multiple interfaces for integration into existing systems. It features an RS232 interface, enabling serial communication with a host computer or access control system. Additionally, a Wiegand interface is integrated, which is used as a standard in many access control systems. The combination of RS232 and Wiegand allows for flexible connection to various system architectures. The device is supplied with open cable ends, meaning that cabling must be performed by the user. Dimensions are 43 mm (width) × 15 mm (height) × 78 mm (depth), representing a compact design suitable for tight mounting conditions.

Technology Explained Simply
The operation is based on inductive communication in the 125 kHz range, where the device generates an electromagnetic field that activates the RFID transponder. The transponder then transmits its unique ID, which is received by the reader and forwarded via the interfaces. Support for EM4102 means the device is compatible with a widely used transponder encoding, commonly employed in many access control systems. Reading of magnetic stripe cards in the MSR ABA Track 2 format is performed via an integrated magnetic stripe reader, which reads data from the second track (Track 2), relevant for processing credit cards or identification cards.

Compatibility and Accessories
The device is designed for use with RFID transponders in the 125 kHz range and magnetic stripe cards in the MSR ABA Track 2 format. It can be integrated into systems supporting RS232 or Wiegand interfaces. The open cable connection requires individual cabling, with the wiring assignment to match the respective system provider.

Mounting and Installation
Mounting is performed using the integrated frame, which allows the device to be secured to a suitable surface. Cabling must be carried out by the user, connecting the open cable ends to the corresponding system interfaces. Installation does not require special tools, but proper cabling and grounding are necessary to ensure reliable operation. The device’s dimensions allow for mounting in confined spaces, such as on doors or in enclosures.

Advantages in Operation
The device provides reliable and fast user identification, with the combination of RFID and magnetic stripe reader increasing flexibility. Support for multiple interfaces (RS232 and Wiegand) simplifies integration into existing systems. The compact design and integrated frame enable flexible mounting, and the dark grey finish blends well into most environments. Contactless reading up to 20 cm reduces physical interaction and enhances user convenience.