With the Honeywell PRO4200 (PRO42IC) series of access control modules any combination of 16 downstream reader or input / output interfaces may be connected to the PRO4200 RS485 ports. 4,000 ft (1,250 m) total bus length per port.

The PRO4200 controller is also compatible with the following LenelS2 downstream devices:

• LS2-ELEM-1300, 1320, 1100, and 1200

• Aperio hubs and locks

• Schlage gateways and locks

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