Configuration Of Hardware Links And Gpi Lines For Power-Sense Options - Tait TM9100 Service Manual

Table 3.1
for the individual power-sense options. It also lists the dependence of the
power-sense options with respect to the GPI lines, which can or cannot be
used.
Table 3.1

Configuration of hardware links and GPI lines for power-sense options

Links
Power-sense option
required
13.8V battery power LK1 in
sense
LK4 out
auxiliary power sense LK2 in
LK4 out
internal power sense LK1 out
LK2 out
LK4 in
no power sense LK1 out
LK2 out
LK4 out
a. If LK2 is out and AUX GPIO is not used, R775 (33k) should be placed to ensure that AUX GPI3 does not float (R775
is not placed by factory default).
b. If LK1 is out and R775 is placed, AUX GPI3 should be driven low as well.
c. If LK 4 is in and R723 is placed, IOP GPIO7 should be driven low as well. (R723 is placed by factory default.)
Table 3.2
power sense' can be configured with any of the above power sense options.
Table 3.2 Configuration of hardware link LK3 and AUX GPI2 for 'emergency power sense'
External push-button
or toggle switch Links
required to enter required
emergency mode
Yes LK3 in
No LK3 in
LK3 out
TM9100 Service Manual
© Tait Electronics Limited August 2005
shows the configuration of the hardware links LK1, LK2 and LK4
Configuration of remaining links and
use of AUX GPI3 and IOP GPIO7
LK2 in:
AUX GPI3 must be left floating.
LK2 out:
AUX GPI3 can be used as GPI
IOP GPIO7 can be used as GPIO.
LK1 in:
Input line must sink <1mA from
AUX GPI3 (which is pulled to 13.8V by a
Ω
33k resistor).
LK1 out:
Input line must be active high
IOP GPIO7 can be used as GPIO.
AUX GPI3 can be used as GPI.
With LK4 in, the input line must be active
c
high .
AUX GPI3 can be used as GPI.
IOP GPIO7 can be used as GPIO.
shows the configuration of 'emergency power sense'. 'Emergency
Implications on AUX GPI2
AUX GPI2 must be connected to an
external (hidden) push-button or toggle
switch, which connects it to ground.
AUX GPI2 must be left floating
AUX GPI2 can be used as GPI.
Voltages
required
≤
10.8V supply
a
.
AUX GPI3 ≤ 0.7V off
AUX GPI3 ≥ 2.6V high (active)
ignition-sense tolerant to
3.3V, 5V and 12V
b
.
≤
IOP GPIO7 0.7V off
IOP GPIO7 ≥ 2.6V high
(active)
ignition-sense tolerant to
3.3V and 5V only
10.8V ≤ supply
Voltages required
≤
0.7V active,
floating inactive
Circuit Descriptions
≤
16V
≤ 16V
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