SETRONIC VERONA ILIA ERHSO712, Руководство пользователя

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ENGLISH
78 Mod. MII
rev. 01
SETRONIC Verona
CHOICE OF CABLE TO USE FOR CONTROLLER - DETECTOR AND DETECTOR –
DETECTOR LINES
2
Ÿ
Minimum section of cable 0,5 mm ; use two cables with two wires following the national
standard for the chosen of type.
Ÿ
Maximum cable diameter 8 mm for cable gland PG9
Ÿ
Max capacity 60pF/m
Ÿ
Max resistance 50 Ohm/km
CAUTION FOR INSTALLATION
Ÿ
When the installation is in electrically noisy environment and/or with the presence of strong
currents, it is necessary to use a cable with two shielded bight cable (one for power supply
and one for the RS485).
Ÿ
It is clear that working to the limit of RS485 line, better features of cable must be considered.
Ÿ
Do not make junction along the lines
Ÿ
Be careful that the connection of the shield, if used, must be connected to the mass only in
one side, at the beginning or at the end of the line. Inside the socket of the detector, make a
bridge with the shield so that it is continuous from beginning to the end of the line.
Ÿ
The RS485 standard is made for the connection of many numbers of devices in multidrop
(daisy-chain). So that they are not allowed shunts or connection in T line mode. This means
that the wire must pass from the first to the second detector and so on up to the last one.
PARAMETER OF SIMPLE «AUTONOMOUS» ISOLATOR
Parameter Value Note
Vmax 32,0 V max. line voltage
Vnom 27,2 V nominal line voltage
Vmin 20,0 V min. line voltage
RSOmax 25 Ω
max. line resistance at which the device isolates
(i.e. switches from “closed” to “open”)
RSOmin 10 Ω
min. line resistance at which the device isolates
(i.e. switches from “closed” to “open”)
RSCmax 50 Ω
max. line resistance at which the device reconnects
(i.e. switches from “open” to “closed”)
RSCmin 35 Ω
min. line resistance at which the device reconnects
(i.e. switches from “open” to “closed”)
ILmax 140 mA
max. leakage current with the switch open (isolated
state)