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Urmet MIKRA 2 VT 1784-1 Manual

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DS1784-001
4 DDA FUNCTIONS SIGNALS
There are three backlit icons dedicated to system status signals (DDA) on the front of the door unit Sch.
1784/1. Specifi cally, the signals indicate:
Symbol Colour Description Acoustic feedback
Green Forwarded call Double beep
Red Busy Quadruple beep
Orange Conversation in progress Single beep
Green Door open Single beep (*)
(*) The feedback signal time is equal to the activation time set for the “Door opener time” function (SW2 DIP
switches 1-2).
The DDA function indications are not available on two-family door units Ref. 1784/2.
5 DOOR ELECTRIC LOCK MANAGEMENT
The door units have two terminals for managing the capacitance discharge and hold of the door electric lock
(SE-, SE+). The electric lock is operated in the following cases:
Whenever the hall button is pressed (terminals PA).
When is received a pedestrian crossing door lock release command coming from an apartment station,
according to the confi guration of the dip-switch AUX used to select operating mode “free” or “privacy”
(see “Confi guration” paragraph).
The electric lock activation time can be programmed by “Door Time” dip-switch.
6 GARAGE DOOR LOCK MANAGEMENT
The doors have two terminals connected to the contacts of a normally open relay which can be used to
control a gate opening control unit (1). The relay is operated for 1 s after receiving the garage door opening
command according to the operating mode (“free” or “privacy”) as the door lock.
(1) The relay is not suitable to control direct power loads and can only be used as control relay. Refer to the
calling station manual for electrical features.
7 TECHNICAL SPECIFICATIONS
Power voltage (LINE): .................................................................................................................. 36 - 48 Vdc
Stand-by consumption: ................................................................................................................. 35 mA max
Max. consumption (video call in progress and name tags on): .................................................. 250 mA max
Working temperature range:................................................................................................... -5 °C ÷ + 45 °C
Reference standards: ..................................................................................... EN 61000-6-3, EN 61000-6-1
Degree of protection of casings: ...............................................................................................................IP55
Degree of protection from mechanical shocks: ........................................................................................IK07
Maximum potential free NO contact ..........................................................................max 200 mA @ 30 Vdc
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