Serial cable built for reliable RS232 handshaking and straightforward connections between computers and legacy kit. Technicians can trust secure DB9 screw fittings and full 7-wire handshaking for stable data transfers. Is DTECH Serial Null Modem Cable the sensible choice for maintaining older RS232 equipment?
⚡ At a Glance
- • Connection Reliability: Seven-wire full handshaking links RTS, CTS, DTR, DSR plus TX and RX for dependable serial communication
- • Best for: Repair technicians and engineers connecting PCs or laptops to legacy RS232C equipment such as scanners and factory test gear
- • Not ideal for: Setups that require USB-only interfaces or wireless serial replacement solutions
Female-to-female DE9 serial null modem cable, five feet long, with AL-foil shielding. DB9 connectors include screws and 30AWG internal wires that follow standard colour coding.
Stable data transfers – with full 7-wire handshaking
Seven individual conductors connect TX, RX and the hardware control lines RTS, CTS, DTR and DSR so hardware flow control remains intact. The standard null modem wiring crosses the necessary signals for two-way communication.
Reliable transfers for scanners, modems and other RS232 peripherals that rely on hardware handshaking, reducing retries and communication errors.
Secure physical connections – thanks to DB9 female connectors with screws
DE9 female connectors on each end are fitted with screw posts to lock connections in place, while AL-foil shielding surrounds the conductors to limit external interference.
Screwed terminations keep plugs secure during movement and shielded construction helps maintain stable signals in electrically noisy environments.
Easy repairs and custom wiring – with 30AWG solderable internal wires
Internal conductors use 30AWG gauge and are wired according to the standard colour code, making individual pins accessible for soldering or splicing.
Ideal for technicians who need to adapt pinouts, repair damaged runs or tie the cable directly into control boards during installations.
✨ The 4 Key Reasons for DTECH Serial Null Modem Cable
- Plug-and-play compatibility - Works instantly with many RS232 COM port devices without extra drivers
- Screw-secured DB9 connectors - Keeps ports firmly mated during movement and handling
- 30AWG solderable conductors - Enables quick splicing and custom wiring for bespoke installations
- Shielded cable construction - Aluminium-foil shielding reduces interference in industrial settings
📋 Technical Details at a Glance
- Category: Serial null modem cable
- Brand: DTECH
- Connector Type: DE9 / DB9 female to female
- Connector Gender: Female on both ends
- Length: 5 ft (approx.)
❓ Frequently Asked Questions
Q: Can this cable connect a PC or laptop to a serial scanner or printer?
A: Yes, the cable connects a PC or laptop to RS232C equipment such as scanners, printers and similar legacy devices using a COM port.
Q: Does the cable support hardware flow control (RTS/CTS, DTR/DSR)?
A: Yes, full 7-wire handshaking is implemented, with RTS, CTS, DTR and DSR lines connected alongside TX and RX.
Q: Are the internal wires suitable for soldering or custom wiring?
A: Yes, internal conductors are 30AWG and follow the standard wire colour code, making them easy to solder or splice.
🏆 Our Verdict
The DTECH Serial Null Modem Cable suits technicians and engineers who maintain legacy RS232 equipment and need dependable wired connections. Full 7-wire handshaking, solder-friendly 30AWG conductors and screw-secured DB9 fittings make the cable a practical choice for installations and repairs. Durable build and straightforward wiring promise long-term reliability for older serial kit.
