Communication solutions for power utilities
UNIVERSAL TELEPROTECTION TPU-1
INSTALLATION AND COMMISSIONING MANUAL Web version TPU-1R - Rev. 5.9 (May 2018)
17/69
3.4
DIGITAL SIGNAL I/O INTERFACE MODULE (DSTU)
The digital signal I/O interface module (DSTU) has six digital optocoupled inputs whose
activation can be established, by means of jumpers, for a nominal voltage of 24, 48 or
110 V
DC
.
Once the nominal voltage has been established, the minimum voltage that guarantees
the input activation is 19 V
DC
for 24 V
DC
, 38 V
DC
for 48 V
DC
and 100 V
DC
for 110 V
DC
, and
the maximum activation voltage, which must under
NO
circumstances be exceeded, is
28 V
DC
for 24 V
DC
, 57 V
DC
for 48 V
DC
and 150 V
DC
for 110 V
DC.
The minimum voltage that guarantees NON activation is 10 V
DC
for 24 V
DC
, 19 V
DC
for
48 V
DC
and 50 V
DC
for 110 V
DC.
Figure 10 shows the position of the input-activation nominal-voltage configuration jumpers in
the DSTU module.
Figure 10 Input-activation nominal-voltage configuration jumpers
of the DSTU module