TC Electronic UpCon - Manual (Page 45)

Appendix 2: UpCon GPI/O page
English Manual 41
D-SUB connector. The input voltage is com-
pared against voltage windows that correspond
to certain presets.
Between the valid voltage windows, invalid win-
dows have been inserted to protect against er-
ratic operation. The processor constantly moni-
tors the GPI input, and only if several consecu-
tive measurements point to the same, valid volt-
age window, a recall is performed.
The voltage windows are chosen to enable easy
“binary relay encoding” as shown in fig. 3-4. If
long cable runs are required, HF decoupling us-
ing a ceramic capacitor across the D-SUB GPI
and GROUND pins may be needed.
For maximum detection precision and maxi-
mum tolerance against cable induced noise/hum
please use the calibration tool in the TC Icon ap-
plication to set the “HI” and “LO” thresholds of
the GPI voltage range.
Fig. 2: Setup: “1 of 2”
Fig. 3: Setup “1 of 4”. Use 1%
precision resistors
Fig. 4: Setup “1 of 8”. Use 1%
precision resistors
In Table 2, voltages outside the limits mentioned
are to be considered invalid. No action is taken
if invalid measurements are made. GPI recall ac-
tion resumes when a stable, valid measurement
again is detected.
Mo
de U
se
r Pr
es
et N
o
S
ca
le
d T
ar
g
et / V
s
M
in t
yp / V
Ta
rg
et t
yp / V
M
ax t
yp / V
RL
3 RL
2 R
L1
1 of 2 1 1.000
(idle)
2.67 3.30 3.30 open
2 0.000 0.00 0.00 0.51 clos.
1 of 4 1 1.000
(idle)
3.20 3.30 3.30 open open
2 0.689 2.18 2.28 2.38 clos. open
3 0.548 1.71 1.81 1.91 open clos.
4 0.439 0.00 1.45 1.55 clos. clos.
1 of 8 1 1.000
(idle)
3.20 3.30 3.30 open open open
2 0.826 2.63 2.73 2.83 clos. open open
3 0.689 2.18 2.28 2.38 open clos. open
4 0.602 1.93 1.99 2.05 clos. clos. open
5 0.548 1.75 1.81 1.87 open open clos.
6 0.491 1.56 1.62 1.68 clos. open clos.
7 0.439 1.40 1.45 1.50 open clos. clos.
8 0.402 0.00 1.33 1.38 clos. clos. clos.
Table 2: GPI voltage windows
Notes:
– “Idle” refers to the state when no input is con-
nected, or when the input is left floating.
– Rather than absolute voltage measurements,
the windows are defined as a fraction of the
supply voltage. This voltage can be measured
with a high impedance DMM on the D-SUB
pin 5 or 10.
– The table shows values as a fraction of the
supply voltage, and, as a guideline, typical
voltages when the supply is 3.30V. (If the sup-
ply voltage is e.g. 3.315V, the table should
be corrected by multiplying these values by
3.315/3.3).