Title: Hardware Installation Guide.pdf
4. Wire the downstream interface for the keypad or card reader (for older models of the SRI, a TTL interface is used).5. Wire the power input.62.1Wiring62.1.1Supervised Alarm InputsThe Single Reader Interface Module contains two (2) supervised alarm inputs that can be used for door position and REX exit push button monitoring. These alarm inputs are connected using the I1 and I2 inputs. Wire the I1 and I2 inputs using twisted pair cable, 30 ohms maximum. Terminate each of these inputs with two (2) 1000-ohm resistors (1% tolerance – 0.25 watt).CommunicationsGROUNDGNDNCNORMALLY CLOSEDSTRIKE RELAYBUZZERBZRCCOMMONREADERLEDLEDK 1NONORMALLY OPENDATA1/CLOCK/TR+DAT/D1NONORMALLY OPENDATA0/DATA/TR-DAT/D0NCK 2NORMALLY CLOSEDAUX RELAYCCOMMONREADER POWERVODATA1/CLOCK/TR+TR+VIN+12 VOLT DCSIO COMM. RS-485 INTERFACEDATA0/DATA/TR-TR-GND12 VDC RETURNGROUNDGNDJ4I2I21K, 1% 1K, 1%NOEXIT REQUEST NORMALLY OPEN1 2 3 45 6 7