Lectrosonics DMPA12 - Manual (Page 8)

DMPA12 Installation Guide
LECTROSONICS, INC. 8
Programmable Inputs
Programmable inputs are provided to enable external
control over a variety of parameters. Each input can
respond to either a contact closure or a continuous
voltage. The following illustrates common connections
to the programmable input pins. (See also Program-
mable Inputs and Outputs Wiring Diagram.)
No external pull-up resistors are necessary because
each programmable input is internally pulled up through
a 100K resistor to +5V. When using a continuous volt-
age with one of the programmable inputs, the function
of the programmable input must be set to Analog Out-
put RP Gain Control on the Programmable Inputs
control tab in the Control Panel GUI. See the Program-
mable Input tab in the Control Panel software Help for
setting all programmable input parameters.
Programmable Outputs
Programmable outputs are used to indicate the current
state of a programmable input or to indicate some other
feature of the DMPA12. Each programmable output is
the electrical equivalent of a contact closure to ground.
When a programmable output is “active”, it conducts
current to ground. When the programmable output is
“inactive”, no current flows to ground. The maximum
usable voltage for the programmable outputs is 40 V
and they will safely conduct up to 100 mA DC continu-
ous. Following are some typical uses for the program-
mable outputs.
Note: The diagram shows an external DC source
powering the relay coil. This is necessary
whenever coil voltages exceed 5 V.
Both LEDs and 5V relay coils can be powered by the
+5 V DC pins on the programmable input connector, as
long as the maximum combined current for all LEDS
and relay coils does not exceed 100 mA.
Expansion I/O Ports
DMPA12 Rear Panel
Programmable
Inputs and Outputs
100-240V 50/60Hz 200W
1: GND
2: IN 1
3: IN 3
4: IN 5
5: IN 7
25
13
14
1 6: IN 9
7: IN 11
8: GND
9: OUT 1
10: OUT 3 11: OUT 5
12: OUT 7
13: GND
14: +5V
15: IN 2 16: IN 4
17: IN 6
18: IN 8
19: IN 10
20: +5V 21: OUT 2
22: OUT 4
23: OUT 6
24: OUT 8
25: +5V
A B T X R X
R X T X
1 2
OUTPUT
3 4 5 6 7 8 9 10 11 12
10K Linear Potentiometer
CCW CW
+5V
To Programmable Input Pin
Gnd
Contact Closure as Programmable Input
To Programmable Input Pin
Gnd
DC Voltage Source as Programmable Input
To Programmable Input Pin
0VDC (Off) to +5VDC (On)
Gnd
Potentiometer Connection for
Analog Control of Gain
LED is on when the programmable output is active
380 Ohms
Programmable Output Pin
380 Ohms
LED is off when the programmable output is active
Programmable Output Pin
Gnd (from Programmable I/O
Pins 1, 8, 13)
1N4001
or equiv. External
DC Voltage
Source
(<40VDC) Relay Coil
Coil current <100mA
Programmable Output Pin
Gnd (from Programmable I/O
Pins 1, 8, 13)
Relay is on when the programmable output is active
+5VDC (from Programmable I/O
Pins 14, 20, 25)
+5VDC (from Programmable I/O
Pins 14, 20, 25)