Siemens Pneumatic Direct/Reverse Acting Multi-Purpose Relay

The Powers RL 243 MP Multi-Purpose Relay is a pneumatic auxiliary device designed to provide a variety of pneumatic control functions for the typical control system. Applications include direct and reverse acting amplifying, signal advancing, minimum pressure relay, and lower pressure transfer. The relay operates on a force balance principal and is provided with a Powers two-valve design to assure stability and prevent unnecessary air consumption. Internal relief assembly prevents signal lock-up and assures fail-safe operation. The relay housing is provided with integral brackets to facilitate installation without a separate bracket. A single spring adjustment is provided to allow setting the relay for desired operation. The relay is adaptable for flush panel mounting to facilitate manual readjustment if desired. Application: The multi-purpose relay is factory calibrated with a 15 psi spring adjustment for reverse acting service. However, the multi-purpose relay provides a number of specific control action...