Samson TROVIS 6493 Mounting And Operating Instructions page 14

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.
3-2
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 configured 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.
Configuration
The compact controller can either be config-
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).
EB 6493 EN