Mount the backplate using countersunk headed screwsadjacent to the opening edge of the door.If fixing hole ’A’ is used then the breakout must be removedand the screw must not protrude.Feed the cable from the controller through the backplate.If the wall tamper function is to be used then the small hole inbreakout ‘B’ may be used to mark the position of the wallscrew before the breakout is removed. An appropriate wallscrew should then be adjusted in height to protrude throughthe hole to activate the tamper lever.The front cover is secured to the backplate byUNSCREWING the securing screw ‘C’ via the small holein the enclosure so that the screw head locates in thecounterbored hole on the inside of the enclosure.The screw should not be removed from the backplate.2 Mount the BackplateThe S874 is a contactless smart-card reader, with LED’s. The reader canbe set to use Wiegand orThe S874 reader will read smartMAX encoded MIFARE cards and cardserial numbers from most ISO 14443A smart cards which have a 4-byteUID (User Identification). The reader may be configured to read other cardtypes by presenting a programming card to the reader during start up.For additional information regarding the installation, configuration andproper use of this product:SMS User Guide, P/N 9600-0429, M2150 Access Control Design Guide,P/N 9600-0420,20mA current loop communications.Installation and User Instructions for S874 Readers1 Fit The Weather Proofing KitWhen mounting outside, the gasket kit must be fitted:a) Remove the backplate from the reader after screwingthe securing screw ‘C’ fully IN.b) Position the gasket between the back plate and themounting surface.Note: For UL listed applications, use onlymanufacturer provided gasket, P/N 87X-GASKET.You should findthat the backplatehas holes forconnection to moststandard electricalbackboxes.CAB