Securitron DK-XB - Manual (Page 5)

PN# 500-20300
Page 5 Rev. D, 06/11
cables are of the serial RS232 type and the maximum distance between each keypad and the
buffer box is 100 ft or 200 ft (30 m or 60 m) if special low capacitance cabling is used (consult a
cable supplier). The function of the buffer box is to temporarily store the data coming from each
keypad and then send it to the printer while avoiding any data conflicts. The selection of a
buffer box can sometimes be complicated because computer products change so rapidly and
because there are a large number of different units. We therefore recommend that you contact
Black Box corp., the leading supplier of such devices and describe the application and data
protocol (see Section 4.1). The website of Black Box to obtain their phone number and other
information is: www.blackbox.com.
The second issue is that when more than one DK-26 is reporting to a printer, the messages
should include a prefix which identifies which unit is active. To enable this feature, you must
assign a “door number” to each unit. To do this, put the appropriate keypad into program mode
and enter the command 50 followed immediately by a number from 0-9 (the door
number). Subsequent reports from that unit will identify its unique number as it is used (the
message will say “DOOR #X” as a prefix). Command 51 turns off unique number reporting.
5. SECOND PROGRAMMABLE RELAY
The standard DK-26 CPU board includes a “programmable relay” whose function is set by
entering commands while in program mode (see Section 6 in the DK-26 manual). The default
function of this relay is the doorbell function but it can be reassigned to a duress function,
anti-tamper alarm function, door prop alarm function or nightlight function.
In some installations, more than one function is desired but this is not supported in the standard
DK-26. Expansion adds a second relay so you can enable two of the special functions. As with
the standard unit, the functions are assigned to the relay(s) by entering commands.
The default condition is that the doorbell function is assigned to programmable relay #1 (on
the main CPU board) and no function is assigned to programmable relay #2 (on the expansion
board). Also, new three digit commands are necessary to change the programmable relay
functions as follows:
 751 assigns duress function to relay #1
 752 assigns duress function to relay #2
 761 assigns tamper alarm function to relay #1
 762 assigns tamper alarm function to relay #2
 771 assigns nightlight function to relay #1
 772 assigns nightlight function to relay #2
 781 assigns doorbell function to relay #1
 782 assigns doorbell function to relay #2
This expanded capability does increase the complexity of the installation so bear in mind that if
you get confused as to the state your unit is in, you can enter the command 89 and all factory
set defaults (relay #1 = doorbell; relay #2 = not used) will be reestablished.
Note also that the other commands described in the “main” manual function in an unchanged
manner in an expanded unit. See Appendix “A” in this document for a complete list of all
commands that will function in an expanded unit.
Finally, note that if you are employing the door prop alarm feature explained in Section 6.4
of the “main” DK-26 manual, it takes over programmable relay #1, so you will not be able to
assign this relay to any other function. If you try to reassign relay #1 while the door prop
feature is enabled (from command 82 or 83), you will get an error message. You must first
enter the command 84 to terminate the door prop alarm feature. Programmable relay #2 is, of
course, available to support the other functions. Finally, when you enter command 65, you’ll
get a print-out of all the commands presently in force to aid troubleshooting.