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im Vertrieb von
Installation, cont'd
Figure 2-11 shows the function of the HSA's status pins (6 [up],
7 [down], and 9 [power]). When a status condition is met, the
switch closes, shorting the status pin to ground, pulling it low.
When a status condition is not met, the switch opens, floating
the status pin. Status pins 6, 7, and 9 can sink +5 VDC to
+12 VDC, 500 mA, maximum.
HSA 822M
+
1
2
V
CTL
BRD
S
W
Figure 2-11 — Equivalent status pin circuit
Figure 2-12 expands upon figure 2-11 to show suggested
circuitry to display the HSA's status. In this figure, the LED
lights for as long as the status pin is pulled low (the switch is
shorted [closed]).
HSA 822M
+
1
2
V
CTL
BRD
S
W
NOTE
This drawing shows a standard +5 V power supply. +12 V is another
standard power supply that can be used in this circuit. If you use a
+12 V supply, use a 2k ohm resistor in place of the 470 ohm resistor shown.
Figure 2-12 — Typical status display circuit
If connected to a position (up or down) status pins, the LED
lights when the HSA platform is in the stated position. The LED
is unlit when the platform is in motion or in the opposite
position. Under no circumstances should both position LEDs
light simultaneously.
www.camboard.de
2-14
HSA 822M • Installation
STATUS
PIN
1
G
N
D
470
L
E
D
E
X
T
+
5
V
S
R
C
STATUS
PINS
1
G
N
D
CAMBOARD Electronics
Tel. 07131 911201
Fax 07131 911203
If connected to the power status pin, the LED is lit so long as
power is applied to the HSA.
Figure 2-13 shows a typical locally-constructed contact closure
control and LED indication device.
1
2
3
4
5
6
7
8
9
10
+ -
PWR SUP
Figure 2-13 — Typical local control device
Figure 2-14 shows the HSA connected to an Extron MLC 226
MediaLink™ Controller. The status pin can trigger the MLC's
digital input.
HSA 822M
+
1
2
V
S
T
A
T
U
S
D
G I
T I
A
L
I P
NS
CTL
N I
P
U
T
BRD
S
W
1
G
N
D
G
N
D
Figure 2-14 — Typical MediaLink control device
The MLC's pull-up resistor to 3.3 VDC must be
activated (the MLC's switch 2 closed). Refer to the
MLC 226 product manual.
The flex I/O port on an Extron IP Link™ Ethernet
Control Interface can be used in place of the MLC 226
and its digital input port.
ce-info@camboard.de
HSA 822M • Installation
MLC 226
+
3
3 .
V
+
1
2
V
2
K
S
W
2
C
T
L
2-15
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