Why the 1756-CP3 Belongs in Your Spares Cabinet
When a ControlLogix or SLC controller needs a programming session and the cable is missing, commissioning stalls. The Allen-Bradley 1756-CP3 is the practical answer: an RS-232 programmer cable built to link Logix and SLC family controllers to any compatible Data Terminal Equipment (DTE) device. For engineers running oil, gas, and industrial automation lines, having this cable on the shelf means less downtime and faster fault recovery.
What the 1756-CP3 Actually Does
The 1756-CP3 is a 3-meter (118-inch) programming connector cable from the Allen-Bradley ControlLogix family. One end carries a right-angle female 9-pin D-shell connector that plugs into the controller’s 9-pin port. The other end uses a straight female 9-pin D-shell connector for a computer or other DTE device. That 9-pin to 9-pin layout keeps the connection simple and repeatable across workstations.
Key Parameters at a Glance
| Specification | Value |
|---|---|
| Series | ControlLogix |
| Cable Type | Programmer Cable |
| Length | 10 feet (3 meters) |
| Weight | 0.64 pounds (0.293 kilograms) |
| Connector Ends | Right angle and straight, 9-pin D-shell female |
| Input Current | 970 milliamps at 5.1 Volts DC; 1.7 milliamps at 24 Volts DC |
| Power Dissipation | 5.1 Watts |
| Thermal Dissipation | 17.4 BTU per Hour |
Practical Fit for Oil, Gas, and Plant Floor Work
In a gas compression station, a technician may need to reach a Logix 5550 controller mounted deep inside a panel. The 3-meter length gives useful slack without forcing a laptop into an awkward position, and the right-angle connector reduces strain where clearance is tight. In a water treatment or pipeline control room, the same cable supports quick program uploads and diagnostics on SLC modular controllers.
Because the 1756-CP3 draws 970 milliamps at 5.1 Volts DC, it is a low-burden accessory on the programming port. The 17.4 BTU per hour thermal dissipation is modest, so it adds no meaningful heat inside an enclosure.
Selection Advice Before You Order
Confirm three things: your controller family (Logix 5550 or SLC modular), the port type on the controller side, and the DTE device you plan to connect. The 1756-CP3 uses female 9-pin D-shell connectors at both ends, so verify your equipment presents the matching interface. If you are unsure, our team offers hands-on technical selection help to match the cable to your exact setup.
Integration and Maintenance Notes
Keep the cable coiled loosely and inspect the connector pins periodically for bent or contaminated contacts. Store it away from sharp edges and heavy foot traffic. For safety-related control systems, follow the manufacturer’s safety manual and inspect at scheduled intervals only.
Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Get the 1756-CP3 Without the Wait
Downtime does not wait for a purchase order cycle. Oil AutoTech focuses on fast-dispatch spares for oil, gas, and industrial automation applications, with quick worldwide delivery on stocked items. Contact Oil AutoTech today for pricing and availability.
