GENASYS 3RU User manual

3RU AMPLIFIER
GENASYS INC.
GENASYS 3RU AMPLIFIER
USER MANUAL
16262 West Bernardo Drive
San Diego, CA 92127
www.genasys.com
Manual Part No.: 119456-00 Rev. B
Revised: Oct. 2020
CAGE: 1K3W7
Copyright, 2020, Genasys Inc.
FAULT
AMPLIFIER ON
POWER

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
i
Contents
1.0 Safety Information ................................................................................................................... 1
2.0 Overview .................................................................................................................................. 2
3.0 System Details.......................................................................................................................... 3
3.1 Front Panel........................................................................................................................... 3
3.2 Rear Panel: AC...................................................................................................................... 4
3.3 Rear Panel: DC...................................................................................................................... 4
3.4 Connectors: Plugs, Housings, Adaptors ............................................................................... 5
4.0 Parts List................................................................................................................................... 7
5.0 Installation ............................................................................................................................... 8
6.0 Connect 3RU to 2RU ................................................................................................................ 9
7.0 Connect 3RU to 3RU (3RU Daisy Chain)................................................................................. 10
8.0 Connecting Array of Units...................................................................................................... 12
9.0 Connecting 3RU to DS-60XL Horn Speaker(s) ........................................................................ 13
10.0 Contact Closure Remote Interface....................................................................................... 14
11.0 Frequency Response ............................................................................................................ 14
12.0 Maintenance ........................................................................................................................ 15
13.0 Troubleshooting................................................................................................................... 15
14.0 Specifications ....................................................................................................................... 16
15.0 Technical Support ................................................................................................................ 17

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
1
1.0 Safety Information
Note the following safety instructions when assembling, operating, and storing the Genasys
3RU Amplifier.
•Read and adhere to the instructions detailed in this manual. Keep this manual with the 3RU
Amplifier at all times.
•Make sure all steps are properly taken during assembly and operation. Failure to follow
these steps may result in damage to the device.
•Do not bend, twist, or pinch cables, especially at connection points.
•Make sure all cable connection ports are kept clean and clear of debris.
•Only use attachments/accessories specified by Genasys.
•Refer all servicing and maintenance to qualified personnel.

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
2
2.0 Overview
The Genasys 3RU is a compact, rugged amplifier designed to connect to one or more Genasys
speaker devices.
There are two different options for the 3RU Amplifier, an AC Version (118924-00) and a DC
Version (118925-00). The AC Version operates on 100-250 VAC of input power. The DC Version
operates on 24 VDC of input power.
The 3RU Amplifier is designed to connect with the Genasys 2RU Command and Control Unit.
The 3RU Amplifier can also be daisy chained with other 3RU Amplifiers. Daisy chaining allows a
single audio input source to drive all the amplifiers in an array and increases the number of
speakers that can broadcast the audio file.

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
3
3.0 System Details
This section illustrates the various interfaces and components found within the 3RU Amplifier
Unit.
3.1 Front Panel
POWER
LED illuminates green when power is present
AMPLIFIER ON
LED illuminates green when the amplifier is turned on
FAULT
LED illuminates red when the amplifier has reported a general fault
and has shut down or failed

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
4
3.2 Rear Panel: AC
3.3 Rear Panel: DC
SPEAKER OUTPUTS
Sends audio out to Genasys speakers
CONTROL: INPUTS
Receives control connections from other 3RU or 2RU units
CONTROL: OUTPUTS
Sends control connections to other 3RU or 2RU units
AUDIO: INPUTS
Receives audio signals from other 3RU or 2RU units
AUDIO: OUTPUTS
Sends audio signals to other 3RU or 2RU units
POWER IN
AC: Receives 100-250 VAC input
DC: Receives 24 VDC input
AC: Power switch with built-in
resettable circuit breaker
DC: Resettable fuse

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
5
3.4 Connectors: Plugs, Housings, Adaptors
110984-00: CONNECTOR, PLUG,
5.08mm, 4 POS, SCREW TERM
Speaker Output Connector
110220-00: CONNECTOR, PLUG,
5.08mm, 8 POS, SCREW TERM
Control Input and Output Connector
118662-00: HOUSING, CONNECTOR,
HEAVY DUTY, 120 AMP, GRAY
DC only: Power Input
11866-00: AC POWER CONNECTOR
RECEPTACLE, MALE, PANEL MOUNT
AC only: Power Input

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
6
117329-00: CONN, ADAPTER, RCA
TO RCA, PANEL MOUNT, FEMALE
Audio Input and Output Connector
117333-00: CONN, PLUG, XLR
PANEL MOUNT, 3POS, FEMALE
Audio Input Connector
118911-01: CONN PLUG, XLR PANEL
MOUNT, 3POS, BLACK, MALE
Audio Output Connector

3RU AMPLIFIER
GENASYS INC.
Manual Part NO.: 119456-00 Rev. B
7
4.0 Parts List
Before beginning installation, make sure the 3RU Amplifier was shipped with everything
included in the parts list and that there was no damage sustained during shipment. If there are
any issues, contact your Genasys sales representative.
Part Number
Item Description
Image
119097-00 (AC)
119098-00 (DC)
3RU Amplifier, with Rail Mounts
119143-00
(AC only)
Power Cord, IEC 320-C19, 20 AMP,
2.5 M Long
118936-01
(DC only)
Cable Assy, Power, Heavy Duty
Contact, Gray, 4 AWG,
Unterminated Ends, 10 FT
117854-05
Cable Assy, Red Ferrule, Cable
2Wire, 18 AWG, Red Ferrule, 14 IN
(QTY: 2)
118938-00
Cable, XLR Male to XLR Female, 16
AWG, Gold, 3 FT
119456-00
Manual, Printed, 3RU Amplifier