Pub. 42004-162E GAI-TRONICS® CORPORATION A HUBBELL COMPANY Model 670-002 24 V DC Explosion-proof Speaker Station Confidentiality Notice This manual is provided solely as an operational, installation, 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. General Information The GAI-Tronics Model 670-002 24 V dc Explosion-proof Speaker Station provides safe and clear communications in hazardous areas, even in high-noise situations. This model is NRTL certified for use in the US and Canada for the following areas: Class I, Div. 1, Groups C and D; Class II, Div. 1, Groups E, F, and G; and Class III, Div. 1. The Model 670-002 station enclosure is fabricated from cast aluminum and is suitable for indoor use. If the station is to be mounted outdoors, it should be housed in a GAI-Tronics Model 10444-003 Weatherproof Non-metallic Enclosure. This enclosure is rated NEMA 4X, and can be purchased separately. This installation manual provides instructions on both the placement and mounting of the station. Refer to Pub. 42004-183, which shows the conduit installation and station wiring details necessary to maintain the explosion-proof integrity of the station. WARNING Explosion Hazard – Do not connect or disconnect equipment unless power has been switched off or the area is known to be non-hazardous. Installation Whether installing an entire system or only an add-on station, consult the 24 V dc system layout diagrams at the end of this manual. These figures, used in conjunction with the station installation information and the cable layout guide, should provide all the information necessary to install the Page/Party® stations. These figures do not show an explosion-proof station; however, the basic points of the system layout and design still apply. NOTE A separate power feed is recommended for Page/Party® stations in Div.1 areas. With a separate power feed, the Page/Party® stations can be shut off for maintenance without disrupting the power supply to the other equipment in the Div. 1 area. GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA 610-777-1374 800-492-1212 Fax: 610-796-5954 VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS Model 670-002 24 V DC Explosion-proof Speaker Station Pub. 42004-162E Page 2 of 9 In 24-volt systems, plan on several branch lines from the dc source with no more than six stations per branch. One branch could span up to 4,000 feet for a single station. The Maximum Cable Distance Table lists the limits. Where two or more stations are listed, the assumption is that they are evenly spaced along the cable. The speaker amplifier contains two fuses on the PCBA in the 24 V dc input to protect and isolate the handset and speaker amplifier circuitry in the event of a failure. Power line wiring to each amplifier or group of amplifiers should have a fuse or circuit breaker to protect against wiring failures. If cable with No. 14 AWG power line conductors is used, a 15-amp fuse or circuit breaker should be installed for each branch line at the point it connects to the battery. Fuse or circuit breaker rating is determined by the size cable used in the branch. Consult the National Electrical Code (NFPA70) or Canadian Standards Association (CSA 22.1) for the maximum allowable capacity of the wire used. The GAI-Tronics 24 V dc series of Page/Party® system equipment is designed to operate from a 24 volt dc rechargeable battery. A battery charger can be connected to the battery to maintain the charge. CAUTION Under NO condition should this equipment be operated from a battery charger without the batteries connected. Most chargers have an unloaded output of 35 to 45 volts that can quickly damage the equipment designed for nominal 24 volts. To maintain a proper state of battery charge, the voltage across the batteries will be somewhat greater than 24 volts, but should never exceed 28.8 V dc. Grounding the negative side of the battery system at only one point is recommended and will ensure hum- and noise-free operation. Enclosure Placement All GAI-Tronics Page/Party® units are wired in parallel. Good system layout design minimizes the cable required for each installation. GAI-Tronics multi-conductor cable, designed especially for this application, is recommended. The number, size, and color-coding of conductors are listed in the accompanying system connection diagrams. System layout and power cable length are important considerations when installing Page/Party® equipment. Consult the Maximum Cable Distance table for typical cable lengths. The cable distance between stations as well as total cable distance must be considered. Cable distance is more strictly regulated in 24 V dc systems because of the amount of resistance these cables encounter—the longer the cable distance, the greater the resistance and IR losses (voltage drop) encountered. f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Pub. 42004-162E Page 3 of 9 Model 670-002 24 V DC Explosion-proof Speaker Station Maximum Cable Distance in Feet* Number of Units No. 14 AWG Total / Between No. 12 AWG Total / Between No. 10 AWG Total / Between No. 8 AWG Total / Between 1 977 / 977 1,554 / 1,554 2,471 / 2,471 3,931 / 3,931 2 651 / 325 1,037 / 518 1,648 / 824 2,620 / 1,310 3 489 / 163 777 / 259 1,236 / 412 1,966 / 655 4 391 / 98 622 / 155 988 / 247 1,572 / 393 5 325 / 65 518 / 103 823 / 165 1,310 / 262 6 279 / 46 444 / 74 706 / 117 1,123 / 187 9 196 / 21 311 /34 494 / 55 786 / 87 *Based on the following assumptions: Continuous tone (alarm) signals driving each station’s speaker amp to a maximum of 12 watts. NOTE: If the station is used for speech (audio) signals only, the distances stated above can be multiplied by a factor of 2 because speech signals do not have the energy content that a continuous tone has; therefore, they do not require as much average current and thus less cable IR drop will result. GAI-Tronics-supplied cable is used. Wire resistance (ohms) is the nominal value for the applicable AWG at 1,000 feet of bare copper, stranded wire @ 20º C (68º F). Wire resistance values used are as follows: No. 14 AWG = ~2.525 ohms; No. 12 AWG = ~1.588 ohms; No. 10 AWG = ~0.999 ohm; No. 8 AWG = ~0.628 ohm DC V at cable run’s feed point (Float charge of connected batteries) = ~26.6 V dc DC V at the last unit in cable run = 21 V dc minimum Station unit current draw (I) is the same regardless of the unit’s placement along the cable run for ease of calculation. (1.1 amperes when unit is producing a 12-watt sine wave output.) Distances reflect a 3% reduction for margin of error. For conditions other than above, the following formula may be helpful in calculating the approximate maximum distance for a SINGLE station. For CONTINUOUS tone applications with minimum distortion: For SPEECH operation only, multiply the above result by a factor of 2. Example: What is the approximate maximum distance for a single dc station if the voltage feed is 27.5 V dc and a No. 14 AWG wire is used @ 20º C? Info: No. 14 AWG @ 20º C = ~0.002525 ohm per foot 2 for LOOP R VFEEDPOINT = 27.5 V dc Solution: (27.5 V – 21 V) / ((2 0.002525 ohm per foot) 1.1 amps) = 6.5 / 0.005555 = 1,170 feet (for CONTINUOUS TONE signal), or up to ~2,340 feet (factor of 2) for SPEECH signals f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Model 670-002 24 V DC Explosion-proof Speaker Station Pub. 42004-162E Page 4 of 9 Mounting Refer to Pub. 42004-183, which is shipped with this unit. The suggested mounting height for all station enclosures is 54 inches (137 cm) up to the centerline of the enclosure. To maintain the explosion-proof integrity of these stations, all mounting hardware is located outside the enclosure. The unit should be mounted using the two mounting straps that extend past the four corners of the enclosure. See Figure 1. Use the standard 3/8-inch bolts to secure the enclosure to the mounting surface. Secure the bottom two bolts first, then the top bolts. The mounting strap design allows the station to be removed from its mounting surface by removing only two of the bolts. NOTE If this unit is to be used outdoors, it should be mounted inside a Model 10444-003 Weatherproof Non-metallic Enclosure, which is equipped with a front door. This enclosure has four mounting feet in the four corners and is suitable for mounting to many surfaces. Conduit Installation Refer to Pub. 42004-183, which is shipped with this unit. This publication details how to maintain the explosion-proof integrity of the station. NOTE External conduits in areas with Class I, Group C and D areas must have gas seals not more than 18 inches (457 mm) from the station enclosure. External conduits in Class II and Class III areas must have seals if the conduit system is not dust-tight. Wiring After the station has been mounted, use a 7/16-inch wrench to open the front panel of the station to access the Termination PCBA. Refer to Pub. 42004-183 for wiring details. Feed the wiring through the conduit and into the enclosure. Follow the wire colors carefully—these colors correspond to GAI-Tronics 60029 or 60038 Series cable. The wires must be spade-lugged and connected carefully and completely to the terminal block. An improper termination may result in diminished station performance. Before closing the station, plug the power interconnect cable from the front of the enclosure into the connector on the power supply card in the rear enclosure. NOTE All the bolts must be installed to maintain the integrity of the explosion-proof construction. f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Model 670-002 24 V DC Explosion-proof Speaker Station Figure 1. Model 670-002 Mounting Details f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Pub. 42004-162E Page 5 of 9 Pub. 42004-162E Page 6 of 9 Model 670-002 24 V DC Explosion-proof Speaker Station Speaker Muting Information This station is equipped with a muting feature that is used if the station is located near other handset/speaker stations. This feature prevents acoustic feedback between stations during paging by muting the station’s associated speaker. This station is shipped from the factory with the mute feature enabled. To disable the muting feature, remove jumper W6 located on the 10489-002 Termination PCBA. The chart below describes how the muting function operates when specific combinations of wire jumpers W3, W4, W5, and W6 are installed on the Termination PCBA. W3 W4 W5 W6 O X X X AUX/PAGE inputs to the amplifier are muted during station page (as shipped from GAI-Tronics—see the note). O X X O AUX/PAGE inputs to the amplifier are not muted during a station page. O X O X PAGE input is muted only during a station page. X X O X PAGE input is muted during a station page or by contact closure between the Mute A and B inputs. X O X X PAGE/AUX inputs are muted during a station page or by contact closure between the Mute A and B inputs. X O O O PAGE/AUX inputs are not muted. Isolated normally open relay contact output between the Mute A and B terminals is closed during station pages. X = Installed Description of Operation O = Not Installed. Mutual Muting NOTE: Jumpers W4, W5, and W6 must be installed. Stations that are located closely together may require mutual muting of the page amplifiers. To accomplish mutual muting between stations, connect the orange (spare) wire in the GAI-Tronics station cable to TB2-A on each of the Div. 1 stations that require muting. All the mutually muted stations are muted when any connected station is paging. Mutual muting can be accomplished between the Div. 1 stations and Div. 2 enclosures using most GAI-Tronics 600 or 700 Series enclosures by connecting the orange (spare) wire between TB2-11(A) on the Div. 1 station and TB1-7 on the Div. 2 enclosure: Div. 1 Stations (TB2-A) Div. 2 Enclosures (TB1-7) 670-002 702-002 733-002 780-002 732-102 7335-002 7805-002 7325-102 758-002 Consult GAI-Tronics for any enclosures not listed. NOTE: The auxiliary speaker amplifier input is a balanced 10-kilohm audio input. f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 703-002 Model 670-002 24 V DC Explosion-proof Speaker Station Pub. 42004-162E Page 7 of 9 Specifications Power input ......................................................... 21–29 V dc; 1.2 A (optional negative ground or floating) Dimensions ............................................................. 13.1 H 7.9 W 5.6 D inches; (332 200 143 mm) Temperature range ............................................................................ −22° F to +158° F (−30° C to +70° C) Shipping weight .................................................................................................................... 27 lbs. (12.2 kg) Speaker Amplifier Output ....................................................................... @ 25 V dc: 12 watts minimum into 8- or 16-ohm load Voltage gain ........................................................................................................ 20 dB minimum, adjustable Frequency response............................................................................. 250–4,000 Hz, +0/−3 dB ref @ 1 kHz Distortion ............................................................................................ 1% maximum THD @ 1 kHz/12 watt Input impedance .......................................................................................... 50,000 ohm, minimum @ 1 kHz Controls ................................................................................................................................. Speaker volume Explosion-proof Enclosure Material/finish ...................................................................................................... No. 359.2 Aluminum alloy Mounting ...................................................................... Wall or column, four 3/8-inch slotted mounting feet Connections................................................................................. Internal screw-type barrier terminal blocks Conduit entries ...................................................................................................... Standard top: ¾-inch NPT Standard bottom: 1.5-inches NPT Optional bottom: 2-inch NPT Approvals NRTL certified for use in US and Canada for the following locations: ...... Class I, Div. 1, Groups C and D Class II, Div. 1, Groups E, F, and G Class III, Div. 1 REPLACEMENT PARTS Part No. Description 12604-004 Fuse, 2-amp (pack of 10) 61514-005 Harness Assembly 12542-001 Replacement Front Cover Bolts (pack of 14) 69488-106 PCBA, Handset/Speaker Amplifier 69489-002 PCBA, Termination 12571-001 Maintenance Cover Kit f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Model 670-002 24 V DC Explosion-proof Speaker Station f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Pub. 42004-162E Page 8 of 9 Model 670-002 24 V DC Explosion-proof Speaker Station f:\standard ioms - current release\42004 instr. manuals\42004-162e.doc 08/13 Pub. 42004-162E Page 9 of 9 Warranty Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall comply with the then-current product specifications and product literature, and if applicable, shall be fit for the purpose specified in the agreed-upon quotation or proposal document. If (a) Seller’s goods prove to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above, Buyer may return such goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall be Buyer’s sole and exclusive remedy. The warranty period on any repaired or replacement equipment shall be the greater of the ninety (90) day repair warranty or one (1) year from the date the original equipment was shipped. In no event shall GAI-Tronics warranty obligations with respect to equipment exceed 100% of the total cost of the equipment supplied hereunder. Buyer may also be entitled to the manufacturer’s warranty on any third-party goods supplied by GAI-Tronics hereunder. The applicability of any such third-party warranty will be determined by GAI-Tronics. Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors, shall be performed in accordance with the standard of care with which such services are normally provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided any and all issues are identified prior to the demobilization of the Contractor’s personnel from the work site. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAITronics warranty obligations with respect to services exceed 100% of the total cost of the services provided hereunder. Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty periods as set forth above. Provided, however, that if the defect complained of is latent and not discoverable within the above warranty periods, every claim arising on account of such latent defect shall be deemed waived unless it is made in writing within a reasonable time after such latent defect is or should have been discovered by Buyer. Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED BY OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Return Policy If the equipment requires service, contact your Regional Service Center for a return authorization number (RA#). 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 the warranty policy set forth above. 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 identifying the Regional Service Center closest to you. (Rev. 10/06)
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