Keri Systems SB-293 - Manual (Page 47)

Keri Systems, Inc. Technical Reference Manual – PXL-250 and SB-293
Revision 5.5 P/N: 01836-004 Page 47
9.4 TB-4 – Request to Exit Connection
Request to Exit (RTE - also known as REX) devices typically unlocks the door to
allow exit from the building. The PXL-250 controller may accept input from devices
such as switches, motion sensors, or floor mats. The normal state of this input is an
open circuit that will be closed when an input is generated. No voltage is applied at
this input; the circuit is completed to indicate an RTE event. Refer to the Request to
Exit Input starting on page 33 for more information on RTE inputs and input devices.
Refer to Table 9 and Figure 9-7 and make the following connections to attach an RTE
input.
Figure 9-7: Request to Exit Input Connections
NOTE: If a jumper lead from the door status switch input has already been installed
on TB-4, pin 2, loosen the terminal connector and insert the RTE input ground lead
beside the jumper lead.
Table 9: Request to Exit
Input Connections
TB-4 Description
Pin 2 Ground/Common
Pin 3 RTE Signal