Suprema DM-20 Door Control Module

• The DM-20 Secure Multi-Door I/O Module from Suprema provides secure door control for up to four doors, along with the ability to implement centralized access control when used in conjunction with a Suprema device (available separately). Encrypted communication ensures that data transmission remains secure.
• This module is equipped with two Wiegand interfaces for use with third-party readers, an RS-485 communication protocol (OSDP), four relays, four supervised inputs, four TTL inputs, and six TTL outputs.
• Control up to four doors via multiple inputs and outputs
• Provides centralized access control of up to 32 doors and eight biometric devices through a daisy chain configuration when combined with a Suprema device (available separately)
• Secure data transmission thanks to encrypted communication
• Monitor device status with four supervised inputs
• TTL inputs and outputs
• CE, FCC, KC, RoHS, REACH, and WEEE certified.

Might as well look at this ZKTeco K40 Biometric Time Attendance Terminal