InLine B-12222 Null Modem Serial Cable DB-9 Female to Female Beige 2 m

The InLine B-12222 null modem serial cable is engineered for reliable and stable data transmission between various electronic devices. Measuring 2 meters in length with a cable diameter of 5.4 mm, this beige cable features DB-9 female connectors on both ends, equipped with convenient knurl-thumb screws for secure connections. It is manufactured to support efficient serial communication for legacy systems and specialized hardware setups.

Advantages

This serial null modem cable provides a dependable physical link for hardware requiring cross-wired serial communication. The inclusion of knurl-thumb screws ensures that the connectors remain firmly attached during operation, preventing accidental disconnections in critical environments. The durable jacket and standardized pin assignment contribute to consistent signal integrity over the 2-meter distance. Supplied in an environmentally friendly bulk package, it offers a practical solution for installations requiring multiple cables without excessive individual packaging waste.

Suitable for

• Connecting legacy computer equipment and serial peripherals
• Industrial automation and control devices requiring null modem communication
• Data transfer and configuration tasks for networking hardware
• Professional installations and technical setups requiring 9-pin serial connections

When it may not be suitable

This cable is not suitable for modern consumer devices that lack standard 9-pin serial ports, such as contemporary desktop computers or laptops without adapter cards. It should not be used for high-speed network data transfers or video transmissions, as it is strictly designed for low-speed RS-232 serial communication.

Key specifications

• Cable length: 2 m
• Cable diameter: 5.4 mm
• Connector 1: DB-9 female
• Connector 2: DB-9 female
• Wire size: AWG 28
• Color: Beige
• Pin assignment: 1-7+8, 2-3, 3-2, 4-6, 5-5, 6-4, 7+8-1, shield-shield

How to use

To use the null modem serial cable, ensure that both connected devices are powered off before making any physical connections to avoid potential electrical surges. Align the DB-9 female connector with the serial port of the first device and push it gently into place, then secure the connection by tightening the integrated knurl-thumb screws. Repeat the same procedure for the second device at the opposite end of the cable. Once securely attached, power on your equipment and initiate the serial communication software or configuration utility.

What to consider before purchase

• Verify that both of your devices feature standard 9-pin serial ports compatible with DB-9 female connectors
• Confirm whether your specific hardware setup requires a null modem crossover cable rather than a straight-through cable
• Assess the required distance between your devices to ensure the 2-meter length is sufficient

Usage recommendations

Always route the serial cable away from power lines and heavy electromagnetic interference sources to maintain optimal signal clarity. Tighten the thumb screws manually without using excessive force to avoid damaging the port threads.