Fire Service Retrofit for Dover Solid-State

Relay Logic Interface - Model DSS 712

Updating Dover Elevator Controllers to comply with current fire service mandates for Phase I and Phase II operations is a considerable challenge. Dover’s solid-state circuitry was revolutionary when released, but these vintage hydraulic elevator controllers possess unique components. Electrodyn foresaw that most owners would need to upgrade and our engineers devised a fire service board that can be matched to any Dover Controller in service.

Our experienced personnel will utilize information about your particular system to develop a solid and economical solution localized to your city and state elevator codes before preparing a quotation. Next, our designers modify your existing drawings to reflect the revised fire service logic. A regenerated print is returned together with a terminal-by-terminal checklist for ease of installation.

Our technical support and application team is always available to ensure that your installation meets or exceeds requirements, and our outstanding engineering support is just a free phone call away.

Interface

Installation is accomplished in three stages: First, the master section is connected to a common voltage source. Second, the logic section is connected to each controller. Third, a series of 1 to 10 individual relays is paralleled to controller relays providing feedback. Isolation of the master and logic sections allows different relay voltages to be used. The individual relays that provide feedback are not only isolated from the first two sections, but from each other as well, providing maximum flexibility in their use.

The Relay Logic Interface provides a large range of different dry contact configurations to produce the required functionality, regardless of controller logic.

An experienced installer will require motor room wiring time averaging 16 to 24 hours.