Lectrosonics DMTH4 - Manual (Page 8)

DMTH4
LECTROSONICS, INC. 8
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)
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
Input RP Gain Control or Analog Output RP Gain
Control on the Programmable Inputs control tab in
the Control Panel GUI. See the Rear Panel Ctrl tab in
the Control Panel software Help for setting all program-
mable input parameters.
Programmable Outputs
Programmable outputs are used to indicate the current
state of a programmable input, monitor activity on tele-
phone or codec interfaces, and monitor active preset
changes. 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.
Audio Outputs (AUX and CODEC)
The AUX and Codec outputs are a balanced differential
configuration and include an attenuator to reduce the
signal to mic level. Wire these outputs as indicated in
the following illustration.
Telephone Line Jack
Connect a standard telephone cable with RJ11 connec-
tors between the back panel Telephone Line Jack and
the host telephone system.
Programmable Inputs
Programmable inputs are provided to enable external
control over a variety of parameters. Each input can
respond to a contact closure, a DC voltage source,
or the variable voltage output from a potentiometer.
The following illustrates common connections to the
programmable input pins. (See also Programmable
Inputs and Outputs Wiring Example.)
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
DM Out
+ -
Destination
+ -
DM Out to Balanced Input
(3-Wire)
Shield
DM Out
+
-
Destination
+
DM Out to Unbalanced Input
(3-Wire)
Shield
DM Out
+ -
Destination
+
DM Out to Unbalanced Input
(2-Wire)
Shield