826
PROGRAMMING
For inspection purposes, each special services decoder unit produced
by URMET DOMUS is programmed in Direct Drive mode with special
service codes.
How programming is performed will depend on whether Direct Drive or
Indirect Drive has been selected:
DIRECT DRIVE
Programming must be performed with the aid of an entrance panel
or guard door switchboard station. Any of the usual programming
methods may be used. Once the programming methods has been
selected, proceed as follows:
1) Press the programming pushbutton (4): LED (3) will go on.
2) Using the keypad on the calling device (i.e., the entrance module
or guard door switchboard station), enter the fi rst special service
code, observing the following rules:
•
The special service code must be preceded by a “0”.
Consequently, format must be: “ONNNN”
•
Do not use special service codes which have already been
used as door lock release codes at any entrance module in
the system.
•
Be careful when pressing keys, as digits are not shown on the
display as they are entered.
Then press the call button
. LED (3) will fl ash and then remain
on.
3) Enter the second special service code using the same procedure
described for step 2.
After the code is entered, LED (3) will fl ash for a few moments and
then go off.
It is advisable to store both special service codes in memory. The
two codes must be different.
INDIRECT DRIVE
Programming is performed by simulating the event that activates the
relay (with reference to the sixth line in the table on the previous page,
for example, the event consists of pressing the door lock release key
at any doorphone in the system).
The programming procedure is as follows:
1) Press the programming pushbutton (4): LED (3) will go on.
2) Simulate the event that activates the relay. LED (3) will fl ash and
then remain on.
3) Simulate the second event (which may be an activation event
like the fi rst if the relay operates in monostable mode, or a
de-energization event if the relay operates in bistable mode). LED
(3) will fl ash for a few moments and then go off.
NOTICE
To ensure that system maintenance can be effi ciently performed,
it is ESSENTIAL that the memorandum label (2) be fi lled out at the
time the special services decoder unit is programmed.
OPERATION
Performance of the second-generation special services decoder unit
has been signifi cantly enhanced.
The special services decoder unit contains a monostable or bistable
relay that can be driven in two different ways:
•
Directly (as on the fi rst-generation unit) after entering one or two
special codes consisting of the numbers 1 through 9999 and
preceded by a “0” on the entrance module or guard door switchboard
station keypad.
•
Indirectly, when another event occurs. Examples of such events
include a call to an apartment station, a door lock release command
from the switchboard station, a call to the switchboard station, etc.
The unit can be used for a wide variety of purposes: opening electric
gates, turning on stair lights, arming a security system, etc.
For these functions to be correctly performed, however, the device’s
operating mechanism must be thoroughly understood.
The special services decoder unit memory contains two special codes
(see below for programming procedure). When the decoder unit
receives a code which matches one of the two codes in its memory, it
actuates the poles of a double-pole relay.
This relay has two operating modes:
•
In monostable mode, the relay is energized for a minimum of 300
ms whenever either of the two programmed codes is sent to the
device.
•
In bistable mode, the relay is energized when the fi rst code is sent,
and de-energized when the second code is sent. In the event of a
power failure, the relay will remain in the position it was in when
power supply was discontinued.
Whether the relay operates in direct or indirect drive mode will depend
on the codes stored in memory. This will be described in detail below.
DIRECT DRIVE
In this drive mode:
PT1:
Must be in (Specifi c).
PT2:
Selects relay operating mode:
In
→
monostable
Out
→
bistable.
PT3:
See below.
Drive commands can be sent to the special services decoder unit
by entering one of the two special codes consisting of any number
between 1 and 9999 from the keypad of any entrance module or from
the guard door switchboard station.
NOTE:
When entering the special code, remember that the code per
se must always be preceded by a “0”.
With Direct Drive mode, jumper PT3 can be installed to add a further
capability, i.e., that of monitoring the status of special decoder unit
terminal “L”. This terminal can be connected to any ground contact
(“-24”). Whenever a special code is transmitted to the decoder unit,
the status assumed by terminal “L” will be read and sent to the device
which transmitted the code.
Specifi cally:
•
If contact “L” is open, the word “OFF” will be displayed.
•
If contact “L” is closed to ground (“-24”), the word “ON” will be
displayed.
In addition to displaying this information, the entrance module will
generate an audible signal. This signal, which will be repeated three
times, will differ according to contact status: for OFF status, the signal
consists of one short tone and one long tone (similar to an ordinary
telephone dial tone), while for ON status, the signal will consist of a single
short tone repeated three times (similar to a telephone busy signal).
Terminal “L” can be connected to any contact whose status is to be
monitored.
The specifi c case in which the contact is in turn driven by the special
services decoder unit’s relay can be used to provide a feedback
function. Here, transmitting a special code fi rst activates the relay,
and then the status of terminal “L” is read and returned to the device
which transmitted the code. In the monostable operating mode, the
status of terminal “L” is read after relay energization ends and a
minimum of 600 ms after it began.
In the bistable operating mode, the status of terminal “L” is read a
minimum of 300 ms after the relay changes state.
To ensure that the feedback function operates correctly, contact
switching must in all cases take place BEFORE the status of terminal
“L” is read. Consequently, the delays introduced by any devices
installed between the relay and the contact must be less than 600
ms for the monostable operating mode, or 300 ms for the bistable
operating mode.
SPECIAL SERVICES DECODER UNIT Ref. 826/54
PROGRAMMING - OPERATION
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MT124-019
Summary of Contents for 826 DIGITAL CALL SYSTEM
Page 1: ...Model 826 DIGITAL CALL SYSTEM http www urmetdomus com e mail info urmetdomus it MT 124 019 ...
Page 9: ...1 1 MT124 019 Section 1 PRODUCT ...
Page 79: ...Section 2 INSTALLATION DIAGRAM 2 1 MT124 019 ...
Page 80: ...CONTENTS Model 826 DIGITAL CALL SYSTEM 2 2 MT124 019 ...
Page 83: ...826 PARALLEL CONNECTIONS 2 5 MT124 019 ...
Page 89: ...826 DOORPHONE SYSTEMS 2 11 MT124 019 ...
Page 103: ...826 DOORPHONE SYSTEMS WITH GUARD DOOR SWITCHBOARD STATION 2 25 MT124 019 ...
Page 111: ...826 VIDEO DOORPHONE SYSTEMS 2 33 MT124 019 ...
Page 118: ......
