Hubbell GAI-TRONICS SP2 User manual

Pub. 42004-794A
G A I - TRO N I C S ®
A H U B B E L L C O M P A N Y
SP2 POE Remote Subset/Speaker
Amplifier Station
TA B L E O F CO N T E N T S
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 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
Enclosure Mounting and Cable Entries................................................................................................4
Open the Station......................................................................................................................................5
Field Wiring and Configuration............................................................................................................5
Station Ground......................................................................................................................................5
Termination PCBA Connections ..........................................................................................................6
Main PCBA—600-Ohm Audio I/O with Control...............................................................................10
POE Interface PCBA ..........................................................................................................................11
Settings and Adjustments..............................................................................................................12
Open the Station....................................................................................................................................12
Main PCBA Configuration ..................................................................................................................12
Write Protect (EEPROM) Jumper.......................................................................................................12
WDOG Enable (Watchdog) Jumper ...................................................................................................12
Boot Enable Jumper............................................................................................................................12
Reset Switch........................................................................................................................................12
Speaker and 600-ohm Audio Output Volume.....................................................................................13
Receiver Volume ................................................................................................................................14
Group and Station Number Selector Switches....................................................................................14
Main PCBA Indicators.........................................................................................................................14
Power LED..........................................................................................................................................14
Heartbeat LED....................................................................................................................................14
Ethernet Connection LEDs .................................................................................................................14
Five Configurable LEDs.....................................................................................................................14
Install the Front Cover.........................................................................................................................15
Programming ................................................................................................................................15
Remote Subset Operation .............................................................................................................15
Standard Handset Paging.....................................................................................................................15

Table of Contents Pub. 42004-794A
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Party Line Communication..................................................................................................................15
Maintenance..................................................................................................................................16
Troubleshooting....................................................................................................................................16
Replacement Parts................................................................................................................................17
Service....................................................................................................................................................17
Specifications ................................................................................................................................17
Power Consumption..............................................................................................................................17
Ethernet .................................................................................................................................................17
RTU........................................................................................................................................................17
Audio......................................................................................................................................................17
Mechanical.............................................................................................................................................19
Environmental.......................................................................................................................................19
Approvals.......................................................................................................................................19

Pub. 42004-794A
SP2 POE Remote Subset/Speaker
Amplifier Station
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 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 POE remote SP2
configuration is an indoor
handset/speaker amplifier station
using POE 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.
Several options are available to
add to or modify station capabilities (see the Features and Options sections below).
SP2 stations connect to an Ethernet network so the loss of a single station will not adversely affect the
entire system. The stations require a 100 Mbps link to a switch or router using Category 5e 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
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 14 watts of speaker output at 8 Ω
when powered by POE Plus, 6 watts of speaker output when powered via POE.
•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 contact inputs
•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
•durable, high visibility, safety orange powder coat finish.
Options
SP2 station options are factory installed.
•speaker amplifier only (no remote subset)
•70-volt/100-volt speaker connections (requires factory installation of the 70-volt/100-volt toroid on
the termination PCBA)
•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 the NEC.
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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Enclosure Mounting and Cable Entries
NOTE: The enclosure must be mounted
within 10 feet of the remote subset.
1. Mount the enclosure using the four
0.312-inch (8 mm) diameter holes
located on the mounting flanges with ¼-
inch (M6) hardware (see Figure 2).
 The suggested mounting height for
all station enclosures is 48 inches
(1219 mm) to the center of the
bottom mounting holes of the
enclosure.
 The standard SP2 remote station is
not supplied with conduit or cable
openings.
2. 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).
 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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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 POE Remote Station—Interior View
Field Wiring and Configuration
The SP2 POE remote station provides terminal blocks on the termination PCBA located in the rear of the
enclosure for field wiring the speaker, input/output connections, and optional 70-volt/100-volt speakers.
The main PCBA, mounted to the back of the front panel, contains the 600-ohm audio connection. The
Ethernet connection is located on the POE interface PCBA mounted on top of the main PCBA.
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 the NEC.
Station Ground
Connect the station enclosure 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
Figure 4. SP2 Termination PCBA (POE Stations)
NOTE: Installation of 70-volt/100-volt speakers requires factory installation of the 70-volt/100-volt
toroid on the termination PCBA.
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 (see Table 1).
4. Torque the terminal block screws to 8–10 inꞏlb (0.90–1.13 Nꞏm).
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).
6. Configure the LN/SP jumpers P6 and P7 by placing both jumpers in the SP position (see Figure 4).
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 + Parallel/SPEAKER A Series—Output
TB1-2 ⏚ Earth Reference
TB1-3 − Parallel/SPEAKER A Series—Output
TB1-4 + Parallel/SPEAKER B Series—Output
TB1-5 ⏚ Earth Reference
TB1-6 − Parallel/SPEAKER B Series—Output
Figure 5. 8/16-ohhm Speaker Impedance Configuration

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RTUInputs
The standard termination PCBA contains two unsupervised auxiliary RTU inputs. Terminate these inputs
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 2).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
Table 2. Standard Termination Board
RTU Input Termination—TB2
Pin
Label
Function
TB2-1
+
RTU 1
INPUT
RTU Input 1 +
TB2-2
−
RTU Input 1 −
TB2-3
+
RTU 2
INPUT
RTU Input 2 +
TB2-4
−
RTU Input 2 −
RTUOutput
A single output relay provides two form “C” contacts to switch external power to a beacon. (see Figure
6). Terminate this output at terminal block TB2 on the termination PCBA (see Figure 4).
1. Pull the RTU output and external power source cables into the enclosure.
2. Connect spade lugs to the wires.
3. Install the RTU output and power source wires to terminal block TB2 (see Table 3 and Figure 6).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
Table 3. 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
COMA
Common Output A
TB2-8
COMB
Common Output B
TB2-9
NO A
Normally Open Output A
TB2-10
NO B
Normally Open Output B

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Figure 6. RTU Output Wiring—TB2
Optional 70 V/100 V Speaker Termination
Terminal block TB3 on the termination PCBA permits connection of 70-volt and/or 100-volt speaker
arrays. All speakers must be wired in parallel (see Figure 4 and Table 4).
NOTE: Installation of 70-volt/100-volt speakers requires factory installation of the 70-volt/100-volt
toroid on the termination PCBA.
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 TB3. Connect 70-volt speakers
between the 70V and COM terminals onTB3.
Two sets of terminals exist for the 70-volt and 100-volt speaker loops, providing termination for
additional speaker loops.
4. Torque the terminal block screws to 8–10 inꞏlb (0.90–1.13 Nꞏm).
5. Configure the LN/SP jumpers P6 and P7 by placing both jumpers in the LN position (see Figure 4).
NOTE: The combined wattage (tap settings) for the connected speakers must be less than or equal to 20
watts for 70-volt speakers or 36 watts for 100-volt speakers.
Table 4. 70 V/100 V Speaker Connections—TB3
Pin Label Description
TB3-1 100V 100 V Parallel Speakers—Output
TB3-2 COM Common
TB3-3 70V 70 V Parallel Speakers—Output
TB3-4 100V 100 V Parallel Speakers—Output
TB3-5 COM Common
TB3-6 70V 70 V Parallel Speakers—Output

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Main PCBA—600-Ohm Audio I/O with 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 5 and Figure 7).
4. Connect the pluggable terminal block to terminal block receptacle TB1.
Table 5. 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
Figure 7. SP2 Main PCBA (POE)

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POE Interface PCBA
Terminate the Ethernet cable to terminal block TB1 on the POE interface PCBA (see Figure 8). The POE
interface PCBA is mounted on top of the main PCBA:
1. Pull a dedicated category-5e 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 (see Table 6).
4. Connect the pluggable terminal block to the POE interface PCBA (see Figure 8).
5. Connect the other end of the Ethernet cable to an 802.af (POE) or 802.at (POE Plus) compliant
switch.
NOTE: Shielded Ethernet cable or metallic conduit is required for installation.
Figure 8. POE Interface PCBA
Table 6. Ethernet Connection—TB1
Pin Label Description
TB1-1 DC− Negative dc voltage
TB1-2 DC− Negative dc voltage
TB1-3 RX− Data Receive −
TB1-4 DC+ Positive dc voltage
TB1-5 DC+ Positive dc voltage
TB1-6 RX+ Data Receive +
TB1-7 TX− Data Transmit −
TB1-8 TX+ Data Transmit +

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Settings and Adjustments
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 rear enclosure using two of the screws just removed (see Figure 9).
Figure 9. SP2 POE Remote Station—Interior View
Main PCBA Configuration
See Figure 10 for the 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.
Reset Switch
Reset switch, S1 reboots the station to its initial state. All configuration settings remain programmed.

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Figure 10. Main PCBA—Remote Subset SP2 Station
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 speaker volume potentiometer, R36 SPKR, fully counter-clockwise (see Figure 10). 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.

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Receiver Volume
The receiver volume is adjusted using the RCVR potentiometer R37 (see Figure 10). 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 R37 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 10). 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 10).
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 10).
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 10).
Five Configurable LEDs
Five LEDs are located on the Main PCBA (see Figure 10). These LEDs are configured through firmware.
Information for configuring these LED indicators is provided in the SP2 Configuration Guide, Pub.

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42004-784 . GAI-Tronics’ product documentation is located on the GAI-Tronics website at
https://www.gai-tronics.com.
Install the Front Cover
After all adjustments have been completed:
1. Place the front cover onto the rear enclosure
Do not pinch any cables.
2. Secure the front cover using the four screws and washers provided.
3. 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 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
external speaker volume 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 not functional
•verify no monitored output faults exist
•check fuse F1 on the Termination PCBA
•check connected device operation
RTU input not functional
•verify no monitored input faults exist
•check RTU Inputs on TB2
•Check operation of connected device.

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Replacement Parts
Part No.
Description
12508-002
Screw Kit (Qty. 32)
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.
Specifications
Power Consumption
POE, IEEE 802.23af Class 0...........................................................................4 W/12.95 W (idle/maximum)
POE Plus, IEEE 802.3at Class 4.......................................................................4 W/25.5 W (idle/maximum)
Ethernet
Cable............................................................................................................................. Category 5e or better
Speed...............................................................................................................................................100 Mbps
Maximum Stations..................................................................................................................................4096
Maximum Cable Length .......................................................................................................................100 m
RTU
Output Control
Maximum load current.............................................................................................................................. 8 A
Maximum in-rush current....................................................................................................................... 15 A
Maximum voltage.............................................................................................................................250 V ac
Input Control
Switch type.................................................................................................................NO or NC dry contacts
Cable resistance .......................................................................................... 100 Ω maximum loop resistance
Contact closure resistance......................................................................................................1 kΩ maximum
Audio
Handset Amplifier
Frequency response............................................................................ 250–3,000 Hz, +0/–3 dB ref. to 1 kHz
Distortion.....................................................................................................................<1.5% THD @ 1 kHz
Receiver level...............................................................................200 mV nominal, adjustable 100–350 mV

Pub. 42004-794A
SP2 POE Remote Subset/Speaker Amplifier Station Page 18 of 19
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Speaker Amplifier
Maximum output:
8-ohm speaker*
PoE Plus............................... 14 W +/−1.0 dB into 8-Ω load with −6 dBFs data signal, default: 4 W @ 8 Ω
PoE......................................... 6 W +/−1.0 dB into 8-Ω load with −6 dBFs data signal, default: 4 W @ 8 Ω
16-ohm speaker*
PoE Plus............................. 7 W +/−1.0 dB into 16-Ω load with −6 dBFs data signal, default: 2 W @ 16 Ω
PoE..................................... 3 W +/−1.0 dB into 16-Ω load with −6 dBFs data signal, default: 2 W @ 16 Ω
Frequency response............................................................................ 250–3,000 Hz, +0/−3 dB ref. to 1 kHz
Distortion.......................................................................................................... <3% THD @ 1 kHz to 14 W
* 100 m maximum cable length with category 5e cable.
70-volt Line Audio Output
Audio Level
POE Plus...................................................................................................................... 53 V RMS (typical)
POE ............................................................................................................................. 36 V RMS (typical)
Minimum Load
POE Plus.........................................................................................................................................249 Ω
POE ................................................................................................................................................249 Ω
Maximum Wattage (XFMR Tap Setting)
POE Plus...............................................................................................................20 W (11.2 W typical)
POE ........................................................................................................................20 W (5.5 W typical)
100-volt Line Audio Output
Audio Level
POE Plus...................................................................................................................... 56 V RMS (typical)
POE ............................................................................................................................. 38 V RMS (typical)
Minimum Load
POE Plus.........................................................................................................................................277 Ω
POE ................................................................................................................................................263 Ω
Maximum Wattage (XFMR Tap Setting)
POE Plus...............................................................................................................36 W (11.3 W typical)
POE ........................................................................................................................36 W (5.5 W typical)
600-ohm Audio Input
Audio Level ...................................................................................................................... 1 V (RMS)maximum
Control type ............................................................................................................................NO dry contact
Control cable resistance................................................................................ 1 kΩ maximum loop resistance
600-ohm Audio Output
Frequency response...................................................................250–3,000 Hz, +0/−3 dB reference to 1 kHz
Distortion....................................................................................<1% THD @ 1 kHz to 1 V (RMS)into 600 Ω
Audio level..............................................................................adjustable 100 mV (RMS)to1 V (RMS)into 600 Ω
Control type ..................................................................NO solid-state relay, maximum on resistance; 35 Ω
Control maximum load current.......................................................................................................... 100 mA
Control maximum load voltage......................................................................................................24 V ac/dc