Lenel offers a Dual Reader Interface (DRI) module for access control
solutions. Most access control card readers, keypads, or readers
with keypads that use standard Wiegand Data1/Data0 or Clock/Data
communication are supported, as are those that support the bidirectional
RS-485 Open Supervised Device Protocol (OSDP). Lock, unlock,
and facility code offline access modes are supported on all readers
connected to the DRI. Each DRI supports up to eight different card
formats as well as issue codes for both magnetic and Wiegand card
formats.
The DRI provides a vital link between the Intelligent System Controller
(ISC) and the card reader attached to the interface. As many as 32
DRI modules can be multidropped using RS-485 2-wire or 4-wire
communication up to 4,000 feet per port away from the ISC. Each DRI
module is individually addressed for increased reporting capabilities with
OnGuard® access control software applications. The DRI includes eight
inputs that support normally open, normally closed, supervised, and
non-supervised circuits. In addition, six output relays support fail-safe or
fail-secure operat