Lectrosonics SPNCWB - Manual (Page 10)

SPNCWB
LECTROSONICS, INC. 10
Programmable Outputs
Programmable outputs are used for several purposes:
• indicate the current state of a programmable input
• monitor activity on telephone or codec interfaces
• 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 voltage for the pro-
grammable outputs is 40 V and they will safely conduct
up to 100 mA DC continuous.
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.
LED
380 TO
500 OHM
10K
LINEAR
POT
CW CCW
IN 1
IN 3
ON
OFF
LOGIC OUTPUTS
GROUND
5VDC
LOGIC INPUTS
LOGIC
OUT 7
LOGIC IN 3
ANODE CATHODE
V
R
Anode
Cathode
Cathode Anode
380 Ohms
Pro gr amma b le Output Pi n
380 Ohms
Programmable Output Pin
1N4001
or equi v . Exte r na l
DC V oltag e
Source
(<40VDC) Rel a y Coi l
Coil current <100mA
Pro gr amma b le Output Pi n
Relay is on when the programmable output is active
+5VDC
+5VDC
GND
LED is ON when the programmable output is active
GND
LED is OFF when the programmable output is active
Note: The diagram above shows an external DC source pow-
ering the relay coil. This is necessary whenever coil voltages
exceed 5 volts.
Power Amp Outputs
The amplifier is designed to run continuously (idle or
with a load) without heat buildup, making it ideal for
permanent installations where prolonged operation is
required.
Each output can drive a variety of loads, including loud-
speakers, long cable runs and headphones. The BTL
(bridge tied load) configuration allows the two channels
to be wired in parallel on a common load to double the
output power.
+
-
+
-
BTL output wiring