GROUP S.P.A.
MT SBC 01
52
Intelligent device for controlling a 10A relay (fitted) for general uses.
Fit a maximum of 10 actuator relay modules Art. 1256 on the
outgoing bus line to an audio/video external unit. Fit a maximum of
30 actuator relay modules Art. 1256 on the outgoing bus line to a
mixer/power supply unit Art 4888C.
Art. 1256, is factory-set to for use on Simplebus2 and Simplebus
Color systems upstream of Art. 4888C.
To use the Actuator Relay Module in Simplebus2 systems
downstream of Art. 4888C:
1) move jumper
JP2
to position 2
2) move jumper
JP3
to position 2
3) move jumper
JP4
to position 2
ACCESSORIES
Relay module Art. 1256
JP2
1
2
JP4
1
2
JP3
1
2
Art. 1256 provides the following six functions depending on
the position of jumper JP1:
A) Call repetition function.
To activate this function, set jumper JP1 as shown in figure 1.
The relay is operated by closing the C.NO contact in response to
a call from the switchboard, external unit or landing; this happens
only if the user code of which you want to repeat the call is set by
means of the DIP switch.
In response to a call from the external unit and
from the landing, the relay closes once only.
In response to a call from the switchboard, the
relay closes twice. Intercommunicating calls are
not repeated.
The actuator relay module can also be used
alone, if you want to close the C.NO contact
rather than repeat the call to an apartment when
the external unit calls the user code set on Art. 1256.
The closure time of the relay is set to approximately 2 sec.
For setting the user code by means of the DIP switch, see
page 79.
For correct fitting of Art. 1256 in the system, see diagram
SB2/MBC on page 109.
B) Activation function on switchboard call pushbutton.
To activate this function, set jumper JP1 as shown in figure 2.
For use only with systems not equipped with switchboard
Art. 1998A.
The relay is operated by closing the C.NO
contact in response to a switchboard call sent
by an interphone or video interphone.
The closure time of the relay can be
programmed by means of the DIP switch (see
table A on page 53). The function can be used
only when the system is free.
For correct fitting of Art. 1256 within the system
see diagrams:
SB2/MBC-SB2/NC- SB/GC.
C) External Unit Light function / Stair Light function.
To activate this function, set jumper JP1 as
shown in figure 3.
The relay is operated by closing the C.NO
contact in response to a call from an external
unit or internal switch-on from a video
interphone.
The closure time of the relay can be
programmed by means of the DIP switch (see
table A on page 53).
For correct fitting of Art. 1256 within the system see diagrams:
SB2/MBC-SB2/NC- SB/GC.
JP1
Fig. 2
JP1
Fig. 1
JP1
Fig. 3
