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Copyright© 2015 

– Saflec Systems (Pty) Ltd. 

http://www.saflecsystems.co.za 

 

 

SDC-650 

Multiple door controller 

Revision 1.1 - (July 08, 2015) 

 
 

Quick Start Guide

 

Introduction 

The SDC-650 is a multiple door controller that can control up to 8 doors. It has five relay outputs 
and eight inputs. 
Up to 16 SDC controllers can be linked using a protected RS-485 network. The PC can connect to 
it using either RS-232 or the built-in Ethernet connector or through the RS-485 network from 
another controller. 
It has a reader RS-485 network that can also connect up to sixteen slave devices including remote 
I/O units. 
 
The unit comes with a 12Vdc 5A power supply and a battery backup of 7Ah and is mounted in a 
lockable case. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 1 

SDC-650 Controller board - labeled

 

 

Summary of Contents for SDC-650

Page 1: ...nputs Up to 16 SDC controllers can be linked using a protected RS 485 network The PC can connect to it using either RS 232 or the built in Ethernet connector or through the RS 485 network from another...

Page 2: ...SDC 650 Multiple door controller 2 Introduction Copyright 2015 Saflec Systems Pty Ltd http www saflecsystems co za Figure 2 Possible position for an SDC 650 in a SACS access control system...

Page 3: ...wer the panel will be active If the screen is blank it will be in screen saving mode Tapping any button will awaken the screen and allow you to configure the device Figure 3 The configuration and diag...

Page 4: ...ations network Each controller on this network requires a unique address for communications and identification Duplicate addresses will cause communication problems The address of the controller can b...

Page 5: ...and last controller on the line by shorting J6 Controllers in the middle of the line must not have the termination jumper inserted as this can cause network problems In the diagram above you will see...

Page 6: ...mmunicate with the host system This can be done through either the Ethernet connection or the RS 232 connection The Ethernet cable is a non power over Ethernet cable to an RJ 45 plug The typical wirin...

Page 7: ...at the controller board with the power connector on the top right of the board the inputs are arranged in ascending order from left to right with a shared common between each input pair See the diagra...

Page 8: ...for the output relays Figure 12 Example wiring for an externally powered magnetic lock Normally closed Output mode 2 Internally powered outputs To set the output to internally powered mode place two j...

Page 9: ...loads such as strike locks care should be taken to prevent a back EMF voltage spike In order to do this a freewheeling diode also known as flyback diode should be connected across the load as seen in...

Page 10: ...Figure 16 The Web interface front page It shows basic diagnostics information on the main page but the links at the bottom will require a username and password for authentication The default username...

Page 11: ...contact Maximum voltage AC 250Vac Maximum voltage DC 220Vdc Internally powered Outputs Maximum combined current 3 7A Recommended maximums per relay 750mA at 12Vdc Externally powered Outputs Recommende...

Page 12: ...SDC 650 Multiple door controller 12 Copyright 2015 Saflec Systems Pty Ltd http www saflecsystems co za Notes...

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