14
Entry-Master Option-4 Hardware Installation Guide
Things to remember when using Transistor Outputs:
!
Always use reverse-bias diodes across and as physically close to the locking
mechanism coil as possible.
!
NEVER attempt to connect any type of AC device directly to the transistor output (for
AC locks, you must use an isolation relay, as described above).
!
Always be sure that the peak voltage being used by the transistor is no greater than
24 VDC and no greater than 1 ampere of current.
!
When using a transistor output as a "relay" (i.e. as in method #2), you must always
break the negative side of the external power supply to the locking mechanism coil.
!
Fail-safe and fail-secure functionality is accomplished through DIP switches 3 and 4
on the Option-4 board. See the EMRI-2 Board Installation Guide for further details.
!
Always check polarities, current draw and measure voltages before connecting
devices to a transistor output.
!
When the transistor is energized or active, the voltage should read about 0.6V
between the collector (C) and ground (Gnd). If the voltage reads zero volts, then
either there is no power through the transistor or you have connected something
improperly.
Obtaining Clear, Up to Date Installation/Engineering Drawings
The drawings in this manual may not be as clear as you need. To obtain full-page, clear
drawings depicting how to connect perpherals to the Option-4 board, use your Internet
browser to go to the Entry-Master Documentation Page, located at the following URL:
http://www.entry-master.com/document.shtml
The following documents are located on this web page:
!
Option-4 System Cut-Sheet
http://www.entry-master.com/Opt-4cut.pdf
!
Option-4
Wiring
Diagram
http://www.entry-master.com/Opt4dwg.pdf
!
Option-4 Installation Guide
http://www.entry-master.com/Opt4_hw.pdf
!
Option-X
Software
Manual
http://www.entry-master.com/OptX_sw.pdf
These documents are also located on the Installation CD contained in the Option-4
enclosure, and can be found in the following directory:
d:\Manuals, where "d:" is the drive letter of your CD-drive.
