Algo 1825 Duet Plus, Installation Manual

Page 1: ... 1 1825 Duet Plus Installation Guide Algo Communication Products Ltd www algosolutions com 90 00046B ...

Page 2: ...am 10 Duet Plus Specifications 11 Applications 12 Dry Contact Office Ringer 12 Loud or Outdoor Dry Contact Ringer 14 Loud Ringer and Paging 16 Nortel Avaya Digital Station Set Ringer 18 Visual Alerting 20 Connecting to a Paging Amplifier 22 CO or FXS Port Loud Ringing 24 Multiple Speakers 26 Application Tips Recommendations 28 Warranty and Repair 30 Duet Plus Accessories 32 Related Algo Product 32...

Page 3: ...nput is not intended to be connected to CO lines or wiring leaving a building TEL TIP RING The input from a telephone CO line or FXS port has been moved from the internal terminal block to an internal RJ11 jack If the Duet Plus is used in an application involving telephone ring detect then a safety approved CSA UL CE A Tick modular cable will be required for connection not supplied POWER SUPPLY Th...

Page 4: ...rd on the speaker Adjust volume and tone to suit bottom left of unit Step 3 Connect telephone system night bell or auxiliary ring contacts to RELAY terminals Step 4 If loud or outdoor ringing is required then connect an 8 Ω speaker such as the 1185 to the SPKR terminals The internal speaker may be disabled by removing the SPK shunt see Inside Diagram on page 8 Note that the auxiliary speaker shoul...

Page 5: ...ently upwards while lifting the cover Once open the unit can be wall mounted with wood screws using the two slot holes in the back Wiring Connections to the Duet Plus are made at the PC Board mounted terminal strip inside the unit In many cases connections will be made to only a few of the terminals and those connections depend entirely on the application The Duet Plus can be installed so that wir...

Page 6: ...resistance for maximum audio power If extra wire pairs are available make use of them to reduce speaker wiring resistance When an auxiliary speaker is used the wiring is normally routed from a Duet Plus directly to the speaker using the shortest distance possible Refer to input and output circuit descriptions and application examples for specific wiring connection information ...

Page 7: ...full power performance Provides both warble and amplified au dio This output can be selected at shunt J3 for high impedance output 10 kΩ for connection to slave amplifiers AUDIO INPUT Input Balanced 600 Ω input for voice paging or ring amplification Maximum 65 mA DC 10 VAC DETECT Input Trigger circuit detecting foreign voltage Isolated input detects 3 to 30 volts DC or AC Input impedance approxima...

Page 8: ... 8 Inside Diagram CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 RJ11 Telephone Jack Green Power LED Red Overcurrent LED OFF Fig 1 Inside Diagram of the Duet Plus ...

Page 9: ...ly when shunt in With shunt out signal is provided through 10 kΩ resistor SPK When in connects internal speaker If the audio input feature is not being used then it is recommended that the J2 shunt be positioned on the two left posts as shown above for OFF This will provide the lowest idle speaker noise and prevent unintentional activation of the warble If the PAG shunt is in the OFF position the ...

Page 10: ...10VAC T R Aux SPKR Warble Oscillator Tone Vol 10k J3 PWR SPK Power Amp Ring Detect Low Voltage Detect Dry Contact Detect Audio Detect J2 DET PAG Pre Amp PAG VOL J1 DET HI LO Fig 2 Block Diagram of the Duet Plus All inputs including power are polarity insensitive ...

Page 11: ...rcuit Input impedance 4 kΩ DC voltage input range 3 30 Vdc AC voltage input range 3 30 Vrms Telephone ring detection Ring detect voltage 20 25 Hz 20 Vrms Input impedance 50 kΩ Audio Paging input Input impedance 600 Ω Page input level HI 0 dBm Page input level LO 18 dBm Audio detection level 43 12 dBm Output sound pressure at 1 m Internal speaker only 93 dBA Typical 8 Ω horn speaker 112 dBA Output ...

Page 12: ...Plus If multiple units were connected to the same contacts then the TEST button would only activate the particular unit being tested When more than one unit is connected to the same contacts then it is necessary to ensure that all RELAY circuits are wired in the same polarity to prevent mutual activation This application is used for offices quiet warehouses and common areas The power supply can be...

Page 13: ... 13 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 Fig 3 Dry Contact Office Ringer ...

Page 14: ...e power For outdoor applications a weatherproof horn speaker such as Algo s 1185 can be mounted on an outside wall while the Duet Plus is located safely indoors Besides keeping the Duet Plus dry this also makes tone and volume adjustment or other maintenance easier The internal speaker may be left in use or disconnected depending on option shunt J3 SPK If the shunt is on then the internal speaker ...

Page 15: ...G HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 8 Ohm Horn Speaker Telephone System Night Bell or Auxiliary Ring Contacts 24 Vdc Power Supply 24 Vdc Power Supply J3 PWR SPK Fig 4 Loud or Outdoor Dry Contact Ringer ...

Page 16: ...air cable can provide power supply dry contacts for ringing and paging audio For maximum output power minimize wiring resistance between the Duet Plus and the speaker If telephone wire is used use all available conductors for power to minimize resistance The warble tone and volume are adjusted as for the previous application The paging volume may be set independently using the PAG VOL control on t...

Page 17: ... 17 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 Paging Volume Fig 5 Loud Ringer and Paging ...

Page 18: ...UT terminals The PAG VOL control now adjusts detection sensitivity Due to the high sensitivity required for ring detection using the headset jack the wiring between the station set and a Duet Plus should not exceed more than several feet In all cases adjust the station set ring volume as high as possible and then adjust the Duet Plus sensitivity for threshold plus a 1 8 turn clockwise Too much sen...

Page 19: ... 19 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 Fig 6 Nortel Avaya Digital Station Set Ringer ...

Page 20: ... the SPKR terminals Whenever the Duet Plus is activated the strobe or alerter will activate The most common application is for visual alerting in environments that are either exceptionally noisy or require noise free alerting When the Duet Plus warble had been activated the speaker output can be used to activate the strobe or visual alerter ...

Page 21: ... 21 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 May be installed if audible alert desired in addition to visual alert Fig 7 Visual Alerting ...

Page 22: ...ains installed the SPKR output is connected directly from the Duet Plus amplifier When the shunt is pulled the SPKR output is provided through a 10 kΩ resistor Into a 600 Ω load the Duet Plus can now deliver a maximum of about 3 dBm signal with good signal to noise performance The output of the Duet Plus when high impedance can parallel an existing connection between a telephone system page port a...

Page 23: ... 23 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 Fig 8 Connecting to a Paging Amplifier ...

Page 24: ...og station ports or ATAs as well as for direct connection to CO Central Office telephone lines Connection is made to the internal RJ11 jack The following example shows the Duet Plus functioning as a loud ringer connected to an FXS port and also a page port from the telephone system dry or wet ...

Page 25: ... 25 CO PBX PAGE VOL DET PAG HI LO DET TONE VOL TEST PWR SPK OVER CURRENT 24V _ J1 J2 J3 RJ11 Telephone Jack 8 Ohm Horn Speaker Paging Outputs FXS Port Fig 9 CO or FXS Port Loud Ringing and Paging ...

Page 26: ... The Duet Plus is fully protected against short circuits and will automatically reduce output power if the output is set too high for the speaker load impedance The facing diagrams show maximum warble power capability with 8 Ω speakers 24 Vdc power supply and no wiring losses Output capability is reduced by approximately 30 for voice paging to avoid clipping Wiring resistance is critical with low ...

Page 27: ... 27 6 W 1 1 W 1 1 W 1 1 W 1 5 W 1 5 W 2 5 W 5 W 5 W 1 5 W 1 5 W 2 5 W Fig 10 Speaker Wiring Arrangements and Typical Output Power The above power values are typical and assume no wiring losses ...

Page 28: ...ically for the Duet Plus but if an alternate power supply is used ensure that it does not supply more than 27 V at a load of 50 mA More than one Duet Plus may share a common set of dry contacts for activation The detection circuit was specifically designed for maximum life of the control contacts and up to 50 units could safely share contacts Also the test button was designed to trigger only the u...

Page 29: ...isable the internal speaker park the shunt back on one pin only so that the shunt is not lost if the speaker ever needs to be activated If the Audio input feature is not being used place the J2 shunt in the OFF position This will reduce idle power and speaker white noise For audio paging applications better audio performance will be obtained with J1 in the LO position The J1 HI position is intende...

Page 30: ...please contact the repair center for a Ticket Number and instructions prior to shipment All product returned for repair should be shipped freight prepaid Product will be returned freight collect for out of warranty repair and freight prepaid for warranty repairs in Canada or the USA Ship product for repair to Algo Communication Products Ltd Repair Center 4500 Beedie Street Burnaby B C Canada V5J 5...

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Page 32: ... connected to auxiliary speaker terminals of 1825 www algosolutions com 1126 2501 Modular Cord Connects Audio Input termi nals to headset jack 2502 Modular Cord Connects Audio Input termi nals to RJ11 telephone line jack Related Algo Product 8180 SIP Audio Alerter The 8180 SIP Audio Alerter is a SIP compliant PoE network audio device for loud ring and voice paging applications www algosolutions co...