Allen-Bradley 849ZOA32 Pneumatic Timing Relay

The Allen-Bradley 849-ZOA32 Pneumatic Timing Relay is an open-type on-delay timer in the 849 timing-relays family that uses a pneumatic timing unit to create a controlled delay after the coil is energized. It is designed for AC operation with a 220–240 V coil rating, making it compatible with common industrial control circuits and panel wiring. The open-type configuration means the timing unit is mounted without a dedicated enclosure, simplifying integration in control cabinets or alongside other automation components. In the on-delay configuration, energizing the coil starts the pneumatic timing sequence, and the output changes state after the programmed delay to enable downstream devices, actuators, or loads, supporting sequencing, interlocking, and orderly start-up in machinery, conveyors, or packaging lines. This model leverages Allen-Bradley’s 849 family pedigree, providing a reliable, pneumatic-timed delay in environments where solid-state alternatives are less suitable or where legacy control designs remain in place. With a 220–240 VAC coil, the 849-ZOA32 is a common choice for international installations seeking a standard AC timer module that can be integrated with existing relays, contactors, and control logic.