Lectrosonics DMPA12 User Manual download pdf (Page 8)

DMPA12 Installation Guide

LECTROSONICS, INC.

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

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

RX TX

OUTPUT

34 56 78 910 11 12

10K Linear Potentiometer

CCW

+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)

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 19 20

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Lectrosonics DMPA12 User Manual Page 8

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