Henry Engineering AUTOSWITCH - Manual (Page 2)

AUTOSWITCH MANUAL, PAGE 2
OPERATION
MANUAL MODE: To manually select between A and B source, set the SIL SEN switch to OFF.
In this mode, a maintained control input will switch from the A to the B source. If there is no control input, the A
source will be selected by default. The green LEDs indicate which audio source is active.
AUTOMATIC MODE: For automatic operation, set the SIL SEN switch to ON. In this mode, the silence sensor will
automatically switch to the B source if the A source fails, loses a channel, or if the audio level drops below the
threshold for the delay time set. The red LED indicates when the sensor has tripped; the green LEDs indicate
which audio source is active. When the A source audio returns, AutoSwitch will switch back to the A source.
The ALARM switch enables the alarm relay. If it is ON, the alarm relay will operate when the silence sensor trips.
The relay can be used to control an external alarm device or other equipment. If the ALARM switch is OFF, the
alarm relay is disabled, although the automatic audio switching function will remain active.
SPECIFICATIONS
INPUT LEVEL -6 to +4 dBu
INPUT IMPED 10K ohms bal, 5K ohms unbal
GAIN -6 to +6 dB
OUTPUT LEVEL +4 dBu nom, +24 dBu max
OUTPUT LOAD 600 ohms or higher per chan, bal
FREQ RESPONSE DC to 20 kHz, +/- 0.25dB
NOISE LEVEL 90 dB below +4 dBu output
DISTORTION .01%
MANUAL CONTROL Maintained contact closure or 5 – 24 VDC
SILENCE SENSE LEV 10 to 40 dB below normal level
SILENCE SENSE DEL 3 – 35 seconds in two ranges
ALARM RELAY
SPDT dry contacts, 24VDC, 1A max
POWER INPUT 115/230 VAC, 50/60Hz, 3 W
APPROVAL City of Los Angeles Elect. Test Lab
CONSTRUCTION Steel enclosure
PHYSICAL DIMEN 5.75”w X 5.50”d X 1.60”h, 3 LBS
Specifications subject to change without notice. Rev. B 9/04