TC Electronic DB6, Руководство пользователя

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Appendix 2: DB6 GPI/O page
DB6 English Manual (2014-10-07) 162
GPIO Technical specifications
The General Purpose Input/Output (GPIO) con-
nector on the DB6 back panel is configured as
follows:
Fig. 74.: Fig. 1: GPIO
D-SUB connector
Pin No Function
1 GPO 1, contact 1
2 GPO 2, contact 1
3 GPI 2
4 GPI 4
5 3V3 output, 100 mA max
6 GPO 1, contact 2
7 GPO 2, contact 2
8 GPI 1
9 GPI 3
10 3V3 output, 100 mA max
11 Ground
12 Reserved
13 Ground
14 Ground
15 Reserved
Fig. 75.: Table 1: GPIO
pin assignments
The 3V3 output (presented on 2 pins) can be
used for external GPIO network as described be-
low. It is currently limited to 100 mA.
Each of the two GPOs consist of a floating inter-
nal relay than can either be set open (this is the
default setting) or closed. Each relay can handle
200 mA / 24 V AC/DC max.
The four GPI inputs are DC coupled 0 to +3V3
inputs. Inside the processor, 100 kOhm resistors
connect the GPI inputs to +3V3 power supply.
When nothing is connected to the GPI input, the
input voltage therefore is +3V3V. A resistor net-
work can be used to pull down the voltage as
suggested in Fig 3-4.
GPI installation
Selection between up to 8 presets is achieved by
feeding the processor a DC voltage to the GPIO
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. 76.: Fig. 2: Setup: “1 of 2”