The Honeywell PW6K1R2 PW-6000 Two-Reader Module provides support for up to two access control doors by providing connections for Wiegand or Clock/Data type readers, supervised inputs, and relay outputs. You can either mount the board in a rack or open and flat. If you rack-mount the board, only one edge is accessible for wiring; however, a flat mount increases the amount of available I/O slightly but significantly decreases the number of boards that can be mounted in one enclosure.