GAI-Tronics SP2 User manual

Pub. 42004-783L2C
GAI-TRONICS®CORPORATION
A H U B B E L L C O M P A N Y
SP2 Remote Subset/Speaker
Amplifier Station
TA B L E O F CO N T E N T S
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice.....................................................................................................................1
General Information.......................................................................................................................1
Product Overview ...................................................................................................................................1
Features....................................................................................................................................................2
Options.....................................................................................................................................................2
Subsets......................................................................................................................................................3
Installation ......................................................................................................................................3
Important Safety Instructions................................................................................................................3
Mounting the Enclosure .........................................................................................................................4
Cable Entries...........................................................................................................................................4
Opening the Station ................................................................................................................................5
Field Wiring and Configuration............................................................................................................5
Station Ground......................................................................................................................................5
Termination PCBA Connections ..........................................................................................................6
Direct Speaker Connection and Jumper Settings..............................................................................6
70 V / 100 V Termination Board Option—Speaker Connections with Monitoring .........................8
RTU Inputs........................................................................................................................................ 9
RTU Output .................................................................................................................................... 10
Power ..............................................................................................................................................11
Main PCBA......................................................................................................................................... 11
600-Ohm Audio I/O with Control...................................................................................................11
Ethernet Termination ......................................................................................................................12
Settings and Adjustments..............................................................................................................13
Opening the Station ..............................................................................................................................13
Main PCBA Configuration ..................................................................................................................13
Write Protect (EEPROM) Jumper.......................................................................................................13
WDOG Enable (Watchdog) Jumper ...................................................................................................13
Boot Enable Jumper............................................................................................................................13
Reset Switch........................................................................................................................................ 14
Speaker and 600-ohm Audio Output Volume..................................................................................... 14
Receiver Volume ................................................................................................................................ 15
Group and Station Number Selector Switches.................................................................................... 15
Main PCBA Indicators.........................................................................................................................15
Power LED.......................................................................................................................................... 15
Heartbeat LED ....................................................................................................................................15

Table of Contents Pub. 42004-783L2C
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Ethernet Connection LEDs ................................................................................................................. 15
Five Configurable LEDs.....................................................................................................................16
Attaching the Front Cover...................................................................................................................16
Programming ................................................................................................................................16
Remote Subset Operation..............................................................................................................16
Standard Handset Paging.....................................................................................................................16
Party Line Communication..................................................................................................................16
Maintenance..................................................................................................................................17
Troubleshooting ....................................................................................................................................17
Service....................................................................................................................................................18
Replacement Parts ................................................................................................................................18
Specifications ................................................................................................................................18
Approvals.......................................................................................................................................20

Pub. 42004-783L2C
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
SP2 Remote Subset/Speaker
Amplifier Station
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374  800-492-1212  Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice
This manual is provided solely as an installation, operation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics
retains all intellectual property and other rights in or to the information contained herein, and such
information may only be used in connection with the operation of your GAI-Tronics product or system.
This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third
party.
This product contains copyrighted computer programs stored in semiconductor memory. These programs
are copyrighted by GAI-Tronics Corporation and may not be reproduced in any form without express
written permission from GAI-Tronics.
General Information
Product Overview
The GAI-Tronics SP2 station is a
modular industrial multicast VoIP
(Voice over Internet Protocol)
communication system. The standard
Remote SP2 configuration is an
indoor handset/speaker amplifier
station using ac power with RTU
control. The SP2 Remote
Handset/Speaker Amplifier Station is
designed to be used in conjunction
with a remote subset. They are
constructed of cold rolled steel with a
gray or safety orange powder coat
finish. A number of options are
available to add to or modify station
capabilities (see the Features and
Options below for more details.
SP2 stations connect to an Ethernet network so the loss of a single station will not adversely affect the
system as a whole. The stations require a 100 Mbps link to a switch or router using Category 5 or better
Ethernet cable. To ensure the quality of SP2 audio, it is recommended that SP2 network traffic be
isolated from other devices and that network switches and routers be properly configured for IGMP
(Internet Group Management Protocol) snooping and multicast filtering. Maximum cable runs between
fiber SP2 stations and network switches are limited to 100 meters to comply with Ethernet standards.
Figure 1. SP2 Remote Station Front Panel

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Features
flexible and highly configurable SMART technology featuring ALS (ambient level sensing), real time
self-diagnostics, and available remote monitoring
real-time operation providing instantaneous page and party line communication
no SIP server or conference bridge requirement
one-way live paging and alarm annunciation over system speakers
distributed amplifier topology—loss of an individual amplifier will not adversely affect the system as
a whole
mutual provisioning mode allows easy system deployment
high efficiency (>80%) Class D paging amplifier provides up to 30 watts of speaker output at 8 ohms
five configurable multicast channels for full-duplex conference communication with party line
selector switch
eight configurable multicast channels for receiving page announcements
one isolated output for beacon activation
two isolated inputs (one isolated input with optional 70V/100V termination PCBA)
600-ohm audio I/O with control
configurable priority scheme allows urgent/emergency pages to override less important pages
configuration stored in non-volatile memory
field adjustable volume control for handset earpiece, headset earpiece, and speaker amplifier
configurable local and nearby speaker mutual muting to prevent acoustic feedback of live pages
configurable pre-announcement tone
off-hook and page switch timeout functionality
configurable virtual zoning ability
USB interface for field or bench configuration
universal ac power supply
durable, high visibility, safety orange powder coat finish.
Options
All SP2 Station options are factory installed.
70/100V constant voltage termination board with 24-watt monitored output
24 V dc power supply
speaker amplifier only (no remote station)
conformal coating for PCBA
gray powder-coat finish

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Subsets
For proper operation, the SP2 Remote Handset/Speaker Amplifier Station must be installed with a remote
subset configuration from the following list:
single or multi-party desktop subset
single or multi-party desk-edge subset
single or multi-party flush-mount subset
The SP2 Remote Subset must be mounted within 10 feet of the subset due to the subset cable limitations.
In addition, the amplifier enclosure must be mounted at an indoor location—the amplifier enclosure is not
designed for outdoor use.
Installation
Important Safety Instructions
Read, follow, and retain instructions—All safety and operating instructions should be read and
followed before operating the unit. Retain instructions for future reference.
Heed warnings—Adhere to all warnings on the unit and in the operating instructions.
Attachments—Attachments not recommended by the product manufacturer should not be used, as
they may cause hazards.
Servicing—Do not attempt to service this unit by yourself. Opening or removing covers may expose
you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
ATTENTION
—Install equipment without modification and according to all applicable local,
national and international electrical codes. North America - Consult the
National Electrical Code (NFPA 70), Canadian Standards Association (CSA
22.1), and local codes for specific requirements regarding your installation.
Class 2 circuit wiring must be performed in accordance with NEC 725.55.
WARNING
—In 24 V dc systems: Under NO condition should this equipment be operated
from a battery charger without the batteries connected.
In 24 V dc systems, most chargers have an unloaded output of 35 to 45 volts that can quickly damage the
equipment designed for nominal 24 volts. The maximum battery voltage should never exceed the
maximum specified input voltage.
WARNING
—Do not disconnect equipment while energized.
Insure proper grounding to protective earthing.
These enclosures must be installed by trained, qualified and competent personnel. Installation must
comply with state and national regulations, as well as safety practices for this type of equipment. The
mounting location must be flat and provide proper clearance, rigidity and strength to support the
enclosure and all contained devices.

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Mounting the Enclosure
Mount the enclosure using the four 0.312-inch
(8 mm) diameter holes located on the
mounting flanges with ¼-inch (M6) hardware.
The standard SP2 Remote station is not
supplied with conduit or cable openings.
Cable Entries
Remove the front panel and drill or punch
entry openings in the rear section of the
enclosure. The station is suitable for top
and/or bottom entry (see Figure 2); however,
bottom entry is recommended to prevent
moisture from dripping onto the termination
board. There must be a minimum of ½ inch
(13 mm) of material between entry holes.
Figure 2. Suggested Wire Entry Locations

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Opening the Station
Complete the following steps to open the station:
1. Remove the four screws from the front panel and turn it to the left to expose the interior surfaces.
2. Keep the wiring and ribbon cables connected.
3. Mount the front panel to the back box’s left-side mounting holes using two of the screws just
removed.
Figure 3. SP2 Standard Remote Station—Interior View
Field Wiring and Configuration
The SP2 Standard Remote Station provides terminal blocks on the Termination PCBA located in the rear
of the enclosure for field wiring the power, speaker, and RTU connections. The Main PCBA, mounted to
the back of the front panel, provides the 600-ohm audio connection. The fiber termination board is
mounted on top of the Main PCBA and provides fiber optic termination for the Ethernet SFP Transceiver.
NOTE: Consult the National Electrical Code (NFPA 70), Canadian Standards Association (CSA 22.1),
and local codes for the specific requirements regarding your installation. Install all equipment
without modification and according to the local and national codes. Class 2 circuit wiring must
be performed in accordance with NEC 725.55.
Station Ground
The station enclosure must be connected to earth ground.
1. Install a #6 ring lug on the ground conductor.
2. Secure it to the ground terminal located in the lower left corner at the back of the rear enclosure (see
Figure 3).

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Termination PCBA Connections
Install all connections as indicated in the following sections:
Figure 4. SP2 Standard Termination PCBA
(Optional 70V/100V Termination PCBA Similar)
Direct Speaker Connection and Jumper Settings
Terminal block TB1 provides termination for the station’s 8 or 16-ohm remote speaker(s).
1. Pull the speaker cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Install the speaker wires to terminal block TB1 in accordance with the table below.
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
5. Configure the speaker jumpers; P2 and P3, for the appropriate impedance for use with 8-ohm or 16-
ohm speakers (see Figure 4 and Figure 5).
A redundant set of terminals is provided for a second speaker branch that can be connected in series or
parallel with the primary speaker.

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Table 1. Direct Speaker Connections—TB1
Pin Label Description
TB1-1 + Primary Parallel/SPEAKER A Series—Output
TB1-2 ⏚ Earth Reference
TB1-3 − Primary Parallel/SPEAKER A Series—Output
TB1-4 + Secondary Parallel/SPEAKER B Series—Output
TB1-5 ⏚ Earth Reference
TB1-6 − Secondary Parallel/SPEAKER B Series—Output
Figure 5. 8/16-ohhm Speaker Impedance Configuration
and AC/DC Termination at TB3

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70 V / 100 V Termination Board Option—
Speaker Connections with Monitoring
The optional 70V/100V Speaker Line
Monitoring PCBA replaces the standard
termination board and provides for connection
of 70-volt and/or 100-volt speakers to the SP2
Station. Terminal block TB1 provides
termination for the station’s speaker loop(s).
All speakers must be wired in parallel. One
speaker loop can be monitored by terminating
the return cable to the LINE SPRVN terminals on
TB2 (see Figure 4, Figure 6, and Table 2).
1. Pull the 70 volt and/or 100 volt speaker
cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Connect 100-volt speakers to the 100V and
COM terminals on TB1. Connect 70-volt
speakers between the 70V and COM
terminals onTB1.
Two sets of terminals exist for the 70 V and
100 V speaker loops providing termination
for additional speaker loops.
NOTE: An SP2 station can only monitor
one speaker loop.
4. For speaker line supervision, connect the
speaker return wires to the LINE SPRVN +
and – terminals at TB2 (see Table 4).
5. Torque the terminal block screws to 8–10
in·lb (0.90–1.13 N·m).
NOTE: The combined wattage (tap settings) for
all speakers must never exceed the
amplifier power rating (24 W).
Table 2. 70 V/100 V Speaker Connections—TB1
Pin Label Description
TB1-1 100V 100 V Parallel Speakers—Output
TB1-2 COM Earth Reference
TB1-3 70V 70 V Parallel Speakers—Output
TB1-4 100V 100 V Parallel Speakers—Output
TB1-5 COM Earth Reference
TB1-6 70V 70 V Parallel Speakers—Output
Figure 6. 70 V/100 V Termination Board Wiring

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RTU Inputs
The standard Termination PCBA contains two auxiliary RTU inputs. The optional 70V/100V termination
board provides for speaker line monitoring and is equipped with just one auxiliary RTU input. These
inputs are terminated at terminal block TB2 (see Figure 4).
1. Pull the RTU Input cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Install the RTU Input wires to terminal block TB2 (see Table 3 or Table 4).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
5. Install end-of-line resistors as shown to enable RTU input-cable monitoring (see Figure 7):
Table 3. Standard Termination Board
RTU Input Termination—TB2
Table 4. 70V/100V Termination Board
Speaker Line Monitoring and RTU Input
Termination—TB2
Pin Label Function Pin Label Function
TB2-1
+
RTU 1
INPUT
RTU Input 1 + TB2-1
+
LINE
SPRVN
70 V/100 V
Supervision +
TB2-2 − RTU Input 1 − TB2-2 − 70 V/100 V
Supervision −
TB2-3
+
RTU 2
INPUT
RTU Input 2 + TB2-3
+
RTU
INPUT
RTU Input +
TB2-4 − RTU Input 2 − TB2-4 − RTU Input −
Figure 7. RTU Input Wiring Configurations for Cable Monitoring

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RTU Output
Two Form “C” contacts are provided to power a beacon (see Figure 8). These outputs can be
reconfigured for dry contact use by removing jumpers JU1 and JU2. Terminations for these outputs are
provided at terminal board TB2 on the Termination PCBA (see Figure 4).
WARNING —Line voltage is present at the NO contact until JU1 and JU2 are removed.
1. Pull the RTU Output cable into the enclosure.
2. Connect spade lugs to the wires.
3. Install the RTU Output wires to terminal block TB2 (see Table 5).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
For beacon cable monitoring:
5. Install a 20-kilohm 10-watt resistor across the terminals of the beacon cable (see Figure 8).
6. Install jumpers at TB2 as shown below to enable cable monitoring.
NOTE: If an RTU Input is used to monitor beacon wiring then it is not available for other functions.
Table 5. RTU Output Contacts—TB2
Pin Label Description
TB2-5 NC A Normally Closed Output A
TB2-6 NC B Normally Closed Output B
TB2-7 COM A Common Output A
TB2-8 COM B Common Output B
TB2-9 NO A Normally Open Output A
TB2-10 NO B Normally Open Output B
Figure 8. Supervised Output Wiring—TB2

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Power
The ac or optional dc power supply is mounted on the Termination PCBA. The termination PCBAs
include terminal block TB3 for connecting the local power source to the station (see Figure 4):
1. Pull the cable from the power source into the enclosure.
2. Connect spade lugs to the wires.
3. Connect the conductors from the ac or dc power source to the appropriate terminals at terminal block
TB3:
Table 6. AC Power—TB3
Table 7. DC Power—TB3
Pin
Label
Description
Pin
Label
Description
TB3-1
LINE
Positive
TB3-1
+
Positive
TB3-2
NEUTRAL
Negative
TB3-2
−
Negative
TB3-3
⏚
Earth ground
TB3-3
No Connection
Main PCBA
600-OhmAudioI/Owith Control
SP2 stations provide a 600-ohm audio input to facilitate broadcasting line level audio over the page line.
A control input exists that requires a normally open dry contact closure to enable the station to broadcast
the 600-ohm input audio. SP2 stations also provide a 600-ohm audio output for sending page line audio
to a remote audio amplifier. A solid state dry contact relay is provided that can be used to control when
the remote audio amplifier plays the audio.
1. Pull the cable for the 600-ohm audio I/O into the enclosure.
2. Install ferrules onto the wire ends.
3. Connect the 600-ohm audio wires to the pluggable terminal block for the 600-ohm audio I/O
connection (see Table 8 and Figure 9).
4. Connect the pluggable terminal block to terminal block receptacle TB1.
Table 8. 600-Ohm Audio I/O Interface Connections—TB1
Pin
Label
Description
TB1-1
IN CT1+
Input Control Positive
TB1-2
IN CT1−
Input Control Negative
TB1-3
IN AUD+
Input Audio Positive
TB1-4
IN AUD−
Input Audio Negative
TB1-5
OUT AUD+
Output Audio Positive
TB1-6
OUT AUD−
Output Audio Negative
TB1-7
OUT CT1+
Output Control Positive
TB1-8
OUT CT1−
Output Control Negative

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Figure 9. SP2 Main PCBA (Ethernet)
Ethernet Termination
1. Pull a dedicated Category-5 or better Ethernet cable into the rear enclosure.
2. Install ferrules onto the wire ends.
3. Connect the Ethernet cable to the 8-position pluggable terminal block.
4. Connect the pluggable terminal block to the Main PCBA terminal block TB2 (see Figure 9).
NOTE: Shielded Ethernet cable or metallic conduit is required for installation.
Table 9. Ethernet Connection—TB2
Pin Label Description
TB2-1 Unused
TB2-2 Unused
TB2-3 RX− Data Receive −
TB2-4 Unused
TB2-5 Unused
TB2-6 RX+ Data Receive +
TB2-7 TX− Data Transmit −
TB2-8 TX+ Data Transmit +

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Settings and Adjustments
Opening the Station
Complete the following steps to open the station:
1. Remove the four screws from the front panel and turn it to the left to expose the interior surfaces.
2. Keep the wiring and ribbon cables connected.
3. Mount the front panel to the back box’s left-side mounting holes using two of the screws just
removed.
Figure 10. SP2 Standard Remote Station—Interior View
Main PCBA Configuration
Refer to Figure 11 for switch, jumper, and LED locations on the Main PCBA.
Write Protect (EEPROM) Jumper
NOTE: This jumper should not be changed in the field.
WDOG Enable (Watchdog) Jumper
Watchdog jumper, P11, enables a watchdog feature for software purposes and should not be adjusted in
the field. The default setting is installed.
Boot Enable Jumper
Jumper P8 – BOOT, is required for development purposes and should not be adjusted in the field. The
default setting for this jumper is open.

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Reset Switch
Reset switch, S1 reboots the station to its initial state. All configuration settings remain programmed.
Speaker and 600-ohm Audio Output Volume
The speaker volume potentiometer, R36, adjusts the signal level to the speaker from the page line. When
600-ohm audio is also connected, R36 will adjust the volume for both. If only 600-ohm audio is utilized
then the volume for the 600-ohm audio must be configured via the CLI (Command Line Interface). The
default setting is 4 watts from an 8-ohm speaker and 2 watts from a 16-ohm speaker.
WARNING —Maximum output power may exceed rated speaker wattage resulting in speaker
damage.
To adjust the speaker or speaker and 600-ohm output volume:
1. Turn the SPKR speaker volume potentiometer R36 fully counter-clockwise. An audible test-tone
will be heard from the speaker.
2. Slowly turn R36 clockwise until the desired output volume is reached. The test-tone ceases three
seconds after no adjustment has been made.
This setting can also be configured via USB or Ethernet connection using the CLI.
NOTE: This setting is overridden if it is configured for the station using the SP2 Console in a mutually
provisioned system. See the SP2 Configuration Guide, Pub. 42004-784.
Figure 11. Main PCBA—Remote Subset SP2 Station

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Receiver Volume
The Receiver Volume is adjusted using the RCVR potentiometer R37. To adjust the volume for the
handset:
1. Remove the handset from the cradle.
2. Turn the RCVR potentiometer R37 fully counter clockwise. An audible test-tone will be heard in the
handset.
3. Slowly turn R36 clockwise until the desired output volume is reached. The test-tone ceases three
seconds after no adjustment has been made.
This setting can also be configured via USB or Ethernet connection using the CLI.
NOTE: This setting will be overridden if it is configured for the station using the SP2 Console in a
mutually provisioned system. See the SP2 Configuration Guide, Pub. 42004-784.
Group and Station Number Selector Switches
One Group-Number and two Station-Number hex-selector switches are used to configure SP2 stations for
Mutual Provisioning (see Figure 11). Each hex switch has a small arrow to indicate the current setting.
1. Adjust the position of the Group-Number selector switch to the desired group [0-F].
2. Adjust the two Station-Number switches to assign the station number [00–FF]. No two stations can
be assigned the same address.
At least one SP2 station must be configured as a Master Station to utilize Mutual Provisioning in an SP2
system. Master stations must be assigned addresses [0.01], [0.02], or [0.03] using the selector switches.
Master station(s) store the configuration of all SP2 stations on the network. As SP2 stations are powered
on, they retrieve the mutual provisioning configuration from the master station. See Pub. 42004-784, SP2
Configuration Guide, for detailed information on configuring SP2 stations and SP2 system mutual
provisioning. GAI-Tronics’ product documentation is located on the GAI-Tronics website at
https://www.gai-tronics.com.
Main PCBA Indicators
Power LED
The Power LED located on the Main PCBA illuminates when power is applied to the station indicating
the main board power supply is operational (see Figure 11).
Heartbeat LED
The Heartbeat LED located on the Main PCBA will flash once communication over the LAN is
established to indicate the microprocessor is operational (see Figure 11).
Ethernet Connection LEDs
Three Ethernet connection LEDs are located on the Main PCBA; Link (LNK), Link Speed (SPD), and
Activity (ACT). The LNK LED is blue, the SPD LED is green, and the ACT LED is yellow. The LNK and
SPD LEDs must be off to indicate that a 100 Mbps Ethernet link is active. The activity LED; ACT, will
blink yellow to indicate Ethernet data activity (see Figure 11).

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Five Configurable LEDs
Five LEDs are located on the Main PCBA (see Figure 11). These LEDs are configured through firmware.
Information for configuring these LED indicators is provided in the SP2 Configuration Guide, Pub.
42004-784. GAI-Tronics’ product documentation is located on the GAI-Tronics website at
https://www.gai-tronics.com.
Attaching the Front Cover
After all adjustments have been completed, place the front cover onto the rear enclosure, being careful not
to pinch any cables. Secure the front cover using the four screws and washers provided. Torque the
screws to 50 in·lb (5.65 Nm).
Programming
SP2 stations are factory configured to provide basic Page/Party®functions upon power-up. For custom
configurations and larger system designs the stations may need to be reconfigured. Refer to Publication
42004-784, SP2 Configuration Guide, located on the GAI-Tronics website at https://www.gai-
tronics.com.
Remote Subset Operation
Standard Handset Paging
Complete the following steps to make a page announcement from an SP2 handset station:
1. Lift the handset from the cradle.
2. If party line conversation is desired, rotate the selector switch to an unoccupied party line.
3. Press and hold the handset pressbar.
4. After the short preannouncement tone is heard (if configured), speak directly into the microphone to
broadcast your page announcement.
NOTE:SP2 stations incorporate a noise-canceling microphone to reduce transmitted ambient noise.
This requires the user to place the microphone as close as possible to their mouth.
5. Release the handset pressbar and wait for a response on the party line (if requested) or replace the
handset in the cradle.
Party Line Communication
To respond to a page:
1. Turn the selector switch on any SP2 station in the system to the requested party line.
2. Pick up the station handset and party line communication can occur.
NOTE:SP2 stations incorporate a noise-canceling microphone to reduce transmitted ambient noise.
This requires the user to place the microphone as close as possible to their mouth.
3. Return the handset to the cradle following the party line conversation.
Party line conversations are not broadcast over the system speakers. Other individuals can join the
conversation at any time by picking up a handset rotating the selector switch to the party line in use.

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Maintenance
Troubleshooting
The following table is provided to aid qualified service personnel in troubleshooting problems with the
SP2 Station.
Problem
Solution
station not functional
check wiring and cable terminations
check power supply voltage at TB3 on Termination PCBA
Power LED on Main PCBA illuminated
Heartbeat LED blinking once per second for normal operation
network communication not
functional
verify LNK LED on main PCBA is off
verify SPD LED on main PCBA is off
verify IP connection settings using telnet
ping station IP address from an admin PC
verify network switch settings for Internet Group Management
Protocol (IGMP) snooping and multicast filtering
remote subset handset receiver
audio is too high/low
adjust the Receiver Volume
check potentiometer R37 setting
check handset connections
check cable terminations between the Termination and Main
PCBAs
check hookswitch operation
replace handset
speaker volume is too high/low
adjust the Speaker and 600-ohm Audio Output Volume
check potentiometer R36 setting
P2 and P3 Termination PCBA jumper positions incorrect (see
Figure 5)
check speaker wiring configuration on TB1
replace the speaker or driver
RTU output is not functional
verify no monitored output faults exist
check fuse F1 on the Termination PCBA
check connected device operation
RTU input does not function
verify no monitored input faults exist
check RTU Inputs on TB2
Check operation of connected device.

Pub. 42004-783L2C
SP2 Remote Subset/Speaker Amplifier Station Page 18 of 20
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Service
If the equipment requires service or spare parts, contact your Regional Service Center for assistance. If
service is required, a return authorization number (RA#) will be issued. Equipment should be shipped
prepaid to GAI-Tronics with a return authorization number and a purchase order number. If the
equipment is under warranty, repairs or a replacement will be made in accordance with GAI-Tronics’
warranty policy. Please include a written explanation of all defects to assist our technicians in their
troubleshooting efforts. Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help
with identifying the Regional Service Center closest to you.
Replacement Parts
Part No.
Description
12508-002
Screw Kit (Qty. 32)
Specifications
Power
AC Input
Input voltage ............................................................................................ 120/230 V ac (nominal), 50/60 Hz
Power factor @ nominal 120 V ac............................................................................................................. 0.5
DC Input
Input voltage ........................................................................................................................24 V dc +/−20%
Power Consumed
(8-ohm load)
120 V AC
230 V AC
24 V DC
Idle
80 mA/6.6 VA
50 mA/12 VA
165 mA/4.0 W
4-watt output (default setting)
150 mA/18 VA
110 mA/25 VA
460 mA/11.0 W
30-watt output
550 mA/65 VA
350 mA/80 VA
1.95 A/46.8 W
Maximum Current
Consumed (8-ohm load)
108 V AC
253 V AC
19.2 V DC
30-watt output
600 mA/65 VA
370 mA/77 VA
2.44 A/46.8 W
Current/Power requirements (+/−10%)
Ethernet
Cable............................................................................................................................... Category 5 or better
Speed...............................................................................................................................................100 Mbps
Maximum Stations..................................................................................................................................4096