Company Information

DOUBLE DOWN PASSING SIGNAL

Model DDP

Both Models DDPA and DDPB produce a floor passing signal

The National ADA Code mandates that elevator controllers produce an audible signal to alert passengers in the car and in hallway areas. Electrodyn Models DDPA and DDPB add this functionality to elevator systems that do not possess floor-passing signaling and hallway single- and double-tone signals. Both functions are provided on one board.

Electrodyn offers two models of pass/pulse control-signal circuitboard interfaces and our experienced application team can help you select the best option for your particular upgrade. In either configuration the DDPs provide double downstroke for lanterns. Model DDPA adds a floor passing signal gleaned from controller logic, while the DDPB utilizes signals from the position indicator. The DDPs are provided with the correct pilot relay type to match the controller voltage, and the units can provide both functions when direct application is prohibited (e.g., with microprocessor-based systems).

Our technical support and application team is always available and our excellent service support is just a free phone call away.

Interface

Our personnel will evaluate your particular system before suggesting which model is best suited to your needs. Each model differs only in how the passing signal is generated. Model DDPA utilizes a clear-floor passing signal from the controller whereas Model DDPB monitors the position indicator signal. In either case the resulting pulse drives a tone generator or buzzer mounted in the car station. Lantern interface for the two-stroke pulse feature is made by adding an “interrupt circuit” in series to the down-lantern signal at the controller.

The passing signal in either configuration is generated twice per second. In application with 12-foot landings this translates into 1440 fpm. (Faster retrofits can be special ordered). Choose Electrodyn: we work with you when you have work to do!

Technical Specifications

DDPB
• 3.44" H x 11.19" W

• Pilot relays reduce downtime and speed installation

• Monitors the position indicator (incand.or LED) to trigger a .5 second pulse

DDPA
• 3.44" H x 6.38" W

• Utilizes a clear floor passing signal to trigger a .5 second pulse

Both models add a 2-stroke pulse to the down lantern signal and each produces a floor passing signal

Key features
● Two-stroke pulse for car or hall lanterns. (One board controls all hall lanterns.)
● Compatible with all major elevator control systems.
● Drives standard buzzer/tone generator.
● Pilot relays provide isolation.
● Average installation time (determined by direct field feedback) is: Model DDPA - 1 hour; Model DDPB - 2.5 hours.

Copyright© Electrodyn Systems, Ltd. 2011
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