Extron Electronics HSA 822M User’s Manual - Manual (Page 14)

HSA 822M • Installation HSA 822M • Installation
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.
V 2 1 +
1 W S
STATUS
PIN
D N G
HSA 822M
CTL
BRD
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]).
STATUS
PINS
470
ohms
HSA 822M
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.
CTL
BRD
V 2 1 +
1 W S
D N G
D E L
V 5 +
T X E
C R S
Figure 2-12 — Typical status display circuit
If connected to a position (up or down) status pin, 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.
If connected to the power status pin, the LED is lit when 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 10 9
PWR SUP
+ -
Up
Do
wn
Stop
Enab
le
Up
status
Do
wn
status
Pwr
status
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.
CTL
BRD
V 2 1 +
1 W S
HSA 822M
S U T A T S
NS I P
D N G
V 2 1 +
2k
ohms
2 W S
V 3 . 3 +
MLC 226
L A T I G I D
T U P N I
D N G
L T C
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.
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