Controlled Electronic Management Systems Ltd INFOPROX Manuale Utente

Technical Description 

InfoProx Entry 

Reader electronics are totally encapsulated and therefore, PCB components 
cannot be accessed. The only components visible at the back of the reader are 
connectors, the tamper sensor, the RS485 terminator loop, and the buzzer. The 
following major components of the reader are described in the following sections. 

Each reader has a single dry contact relay that provides a control signal to external 
units. The relay is energized through a discrete, EEPROM-controlled switching 
circuit, which determines the Relay Idle State.  

The Relay Idle State function (when the reader is available for a transaction) 
defines whether a relay is:  

·  Normally Closed - relay energized, opening on a valid card swipe or 

power fail, Powered to Secure. 

·  Normally Open - relay de-energized, closing upon a valid card swipe or 

power fail, Powered to Unlock. 

The Relay Idle State is configured through the reader setup program. 

Readers controlling fire exits may be configured Powered to Secure mode, 
depending upon local codes. 

Tamper Switch 

An optical tamper sensor on the board activates when the unit is removed from the 
wall, triggering an alarm.  

Memory 

The reader is supplied with a 512K Static RAM chip (HM628128LP-10 or 
equivalent). During normal operation, the IDs of all valid cards are held in RAM. 
Details of all transactions that occur at the reader are stored in RAM and can be 
downloaded to the workstation when communications are restored. 

Interconnections 

InfoProx Entry reader is designed for ease of installation and maintenance. 
Interface connections between the reader circuit board and external items, such as 
the exit reader or door locks, are made by means of connectors mounted on the 
back of the unit. The function of each of these connectors is detailed below.