TDE MACNO 374T000600V, Руководство пользователя

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6 MA00001E00 V_1.1
Supply voltage has very wide input range (see specifications) and the keypad is protected against polarity
reversal. The builtin DC-DC regulator (switching type) assures high efficiency and almost constant power
comsumption over the whole voltage range
.
Please notice that
THERE IS NOT ISOLATION between power supply and the RS485 interface
, so take
care during installation to avoid voltage contentions and ground loops.
7 INTERFACE ADAPTERS
The remote keypad was originally developed to directly connect to the RS485 interface (DB9F) available
both on OPD EXP and mini-OPD EXP, either in point-to-point or multipoint configuration.
Usually the RS485 interface of the drive is also used for connection to a PC and OPD Explorer
configurer/monitor utility in order do easily execute parametrization and commissioning. Sometimes the
RS485 interface is also used as main system fieldbus to connect to an automation controller (where more
powerfull fieldbus is not required or the tradeoff between performances and cost is anyway satisfied).
In these cases, the main RS485 of the drive can't be used anymore to connect the remote keypad as there
can be only one active Modbus master present on the bus (in order to avoid bus contentions).
The remote keypad can be configured (by param) to be “idle” (not active) on the bus, so it is possible to
physically connect the keypad and another master device on the same bus without conflicts but this setting is
intended to be temporary: i.e. to connect with OPD Explorer just the time to commissioning the slaves, then
disconnecting the PC with OPD Explorer and re-enabling the remote keypad.
For all other cases, where the remote keypad had to be permanently operative while the RS485 of the drives
is used by another master, the only solution is to use a different interface: for OPD EXP and mini-OPD EXP
are optionally available specific
interface adapters that add a 2nd RS485 interface to the drive
.
For mini-OPD EXP it is a “dummy keypad”
board that have to be mounted replacing
the standard integrated keypad (so there
will be no more integrated keypad on the
drive: there is just a single led to signal that
the drive has power supply). Insertion and
removing of internal keypad and dummy
keypad have to be done only when drive is
power off.