Cypress Suprex SPX-1300 Руководство по эксплуатации - Страница 17
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SPX-XXXX Application Note
Using Supervised Contacts with the SPX-series Extenders
Applies to the following products: SPX-1300 and EXP series products.
This application note describes the connections necessary to convey supervised contact status over a Suprex®
communication link. The configurations described in this app note should apply to most panels that utilize supervised
contacts. When connected as described, the Suprex® system will provide a supervised signal to the panel interface by
reading the supervised status of the contacts connected to the Suprex® Remote unit.
Theory of operation: The Access control panel is looking for a certain value of resistance connected to the supervised
contact terminals. The Suprex® Central unit will provide these resistance values locally at the panel so that the correct
supervised status is maintained. At the same time, the Remote unit must maintain supervision of the wires connected to
the relays and switches that are connected to the remote access point. The contact supervision is provided by the
Remote unit. The Suprex® system does this by comparing the value of programming resistor at the Central unit with the
resistance seen at the Remote interface terminals. When there is a difference in the two values, the Relay on the Central
unit is activated.
There are two different examples. One example is monitoring a normally closed contact at the Remote unit, and the other
example is monitoring a normally open contact at the Remote unit. In the examples given, a normally closed contact will
require a programming resistor of 1K and a normally open contact will require a programming resistor of 2K. Other
resistor values can be used but 1K resistors are the most common. Other resistance values will require different value(s)
for the programming resistor(s).
8 to 16 VDC In
Ground
1K
Diagnostic LED
2K
RS-485 (+)
RS-485 (-)
+5 VDC out
Prog Res 4
Prog Res 3
LED In
D1/Data out
D0/Clk out
Door
N.C.
Contact
Rex
N.O.
Contact
Central Unit
*
1K
1K
1K
1K
Relay 4 N.O.
Relay 4 Com
Relay 4 N.C.
Relay 3 N.O.
Relay 3 Com
Relay 3 N.C.
RS-232 out
RS-232 in
Ground
Aux out
R2 in
R1 in
8 to 16 VDC In
Ground
Diagnostic LED
RS-485 (+)
Remote Unit
RS-485 (-)
+5 VDC out
R4
*
R3
LED out
D1/Data In
D0/Clk In
I1-
1K
I1+
I2-
1K
I2+
Relay 2 N.O.
Relay 2 Com
Relay 2 N.C.
Relay 1 N.O.
Relay 1 Com
Relay 1 N.C.
RS-232 out
RS-232 in
Ground
Aux in
Not used
Not used