The timer unit with the catalog number 849A-ZOA24 is manufactured by Allen-Bradley/Rockwell Automation to be used across different industries. The 849A-ZOA24 timer unit is intended for an input voltage of 120 Volts and it has an input frequency of 60 Hertz. In addition to that, the maximum voltage rating of the unit is 600 Volts AC. The 849A-ZOA24 timer device is part of the 849A series and it offers a time range of 0.05 to 180 seconds and a variety of features that can improve the overall performance of a system. The 849A-ZOA24 timer unit is part of a series which offers pneumatic type relay devices that have synthetic rubber bellows actuated by the stroke of an AC solenoid. These devices come in 2 variants: on-delay and off-delay, and the 849A-ZOA24 timer is an on-delay timer.

The Allen-Bradley/Rockwell Automation 849A-ZOA24 timer unit is designed for vertical mounting and it supports the addition of auxiliary contacts. The 849A series timers provide a repeat accuracy of +/-10% for the set time while requiring only 75 milliseconds for resetting. The auxiliary contacts can be added to the device when the spring support plate assembly from the solenoid mechanism is removed and discarded. The complete timer unit consists of a timing mechanism and a contact unit. The timer relay includes parts like an operating coil, coil clamp, plunger pin, solenoid base assembly, spring support plate assembly, and auxiliary contacts if these are installed. The 849A-ZOA24 timer unit has a wide temperature range for operation and it is made from industry-grade materials that can withstand usage in harsh environments.