Lectrosonics DM812 User Manual download pdf (Page 8)

DM Series 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.)

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

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 either Analog

In Control or Analog Out Control on the Program-

mable Inputs control tab in the Control Panel GUI.

See the Programmable Input tab in the Control Panel

software Help for setting all programmable input param-

eters.

Programmable Inputs and

Outputs (DM1612F shown)

Programmable Outputs

Programmable outputs are used to indicate either

channel activity or the current state of a programmable

output. 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 volt-

agefortheprogrammableoutputsis40Vandtheywill

safely conduct up to 100 mA DC continuous. Following

are some typical uses for the programmable 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.

Programmable Input/Outputs Connections

Looking at the male connector on the rear panel of the

processor, the pinouts are as follows:

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)

Expansion I/O ports

ThefourRJ45connectorsontherearpanelareused

to interconnect LecNet2™ units together. These ports

are only used to transfer digital audio information via

the Digital Audio Network Interface (DANI) between the

units.

Expansion I/O Ports

(DM1612F shown)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Lectrosonics DM812 User Manual Page 8

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