Serial Loopback Plug – Passive DB9 Male RS-232 Tester – AD-D9M-SLB

Overview Reviews Similar Products –> Product Description AD-D9M-SLB – Serial Loopback Plug The AD-D9M-SLB Serial Loopback Plug is a passive DB9 Male RS-232 loopback tester designed for testing, troubleshooting, and verifying 9-pin serial communication ports. Simply plug the loopback into a DB9 female serial port to create an internal connection between transmit and receive signals, allowing technicians and software to test serial communication without connecting an external device. Features Part Number: AD-D9M-SLB Connector: DB9 Male, 9-pin D-Sub Interface: RS-232 Serial Design: Passive loopback plug No external power required Compact design for convenient field and bench testing Ideal for serial-port diagnostics and troubleshooting Provides quick verification of transmit/receive signal paths Loopback Connections The AD-D9M-SLB uses internal connections to loop selected RS-232 signals back to the serial port: 1-4 | 6-9 2-3 | 7-8 These connections allow compatible serial test software and diagnostic equipment to verify signal continuity and communication pathways. Applications Perfect for: RS-232 serial port testing Computer and equipment diagnostics Field service troubleshooting Bench testing and repair Manufacturing quality control Serial-port continuity testing Equipment installation and maintenance Troubleshooting legacy communications equipment How It Works The loopback plug connects directly to a DB9 Female RS-232 port. Its internal wiring routes transmitted signals back to the appropriate receiving inputs, allowing diagnostic software or test equipment to determine whether the serial port is functioning properly. Because the AD-D9M-SLB is passive, it contains no active electronics and requires no external power supply. American Radio Supply AD-D9M-SLB A simple, reliable tool for RS-232 serial port testing, diagnostics, and service. Product Videos Custom Field Product Reviews Write a Review Write a Review Serial Loopback Plug – Passive DB9 Male RS-232 Tester – AD-D9M-SLB Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *