Samson Trovis 6493 - Page 14

3-2 EB 6493 EN
Design and principle of operation
differential control can be implemented by
subtracting two inputs.
Binary input
The binary input BI1 is activated by a volt-
age signal (4 to 31VDC) and can be used
as follows:
− Start set point ramp
− Switchover between set points
− Increase/decrease actual value
− Activation of the constant output value
(e.g. for enabling control)
− Manual/automatic switchover
− Start output ramp
− Locking manipulated variable
− Activate binary outputs
− Lock control keys
Î uKH6493.
Several functions can be assigned to the bi-
nary input.
Analog output
The following ranges can be adjusted for the
analog output Y:
− 0 to 20mA, 4 to 20mA, 0 to 10V, 2 to
10V
The manipulated variable Y is issued at the
analog output by default. Alternatively, the
input variables X and WE as well as the er-
ror Xd can be issued.
Binary outputs
The binary outputs BO1 and BO2 are de-
signed as relays with double-throw contacts.
They can either used as a three-step output,
on/off output or to monitor limit values and
issue status alarms.
The binary output BO3 is designed as a gal-
vanically isolated transistor output to indicate
collective error messages. If an internal error
exists or the congured signal monitoring of
the inputs responds, the externally connected
voltage signal (3 to 50VDC, max. 30mA)
is generated.
Supply output – Transmitter supply
The supply output (20VDC, max. 45mA)
can be used to supply two two-wire transmit-
ters and the binary input.
Infrared interface
The infrared interface is used to exchange
data between the controller and the TRO-
VIS-VIEW software.
Conguration
The compact controller can either be cong-
ured and operated directly at the controller
using the keys on the front panel (see the
'Operation' section) or on a computer using
the TROVIS-VIEW software (uT6661 and
uEB6661).