Pub. 42004-156D GAI-TRONICS® CORPORATION A HUBBELL COMPANY Model 780-001, 785-001, 7805-001, and 7855-001 Explosion-proof Handset Stations 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 GAI-Tronics hazardous area Page/Party® handset stations are designed to provide safe and clear communications in hazardous areas, even in high-noise situations. These models are 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. Each of these models includes a front-panel push button for paging, a 6-foot PVC coil cord, a noisecanceling microphone for reduced transmission of background noise, and sidetone circuitry to reduce amplification of the user’s voice and background noise into their earpiece. An electrical safety barrier mounted inside the housing creates an intrinsically-safe handset. Multi-party stations include a durable rotary switch for party line selection. The weatherproof stations include a nonmetallic housing with a front door. This installation manual covers the following models: Model Description 780-001 Explosion-proof Handset Station, indoor, 120 V ac, single party 7805-001 Explosion-proof Handset Station, indoor, 120 V ac, multi-party 785-001 Explosion-proof Handset Station, weatherproof, 120 V ac, single party 7855-001 Explosion-proof Handset Station, weatherproof, 120 V ac, multi-party This manual provides instructions for station placement and mounting. Refer to Pub. 42004-184, 42004238, or 42004-239, as applicable, for information detailing how to maintain the explosion-proof integrity of the stations. The appropriate publication is packed with each 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. GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA 610-777-1374 800-492-1212 Fax: 610-796-5954 VISIT WWW .GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 2 of 12 Installation Whether installing an entire system or only an add-on station, consult the 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. 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. The rules vary for different systems, but generally, the total power cable length should not exceed one mile (5280 feet) for 115 V ac systems. The length of cable between the stations is not a factor; the total cable length is the most important consideration. Mounting To maintain the explosion-proof integrity of these stations, all mounting hardware is located outside the aluminum enclosure. The suggested mounting height for all station enclosures is 54 inches (137 mm) up to the centerline of the enclosure. Indoor Station: Mount the indoor unit using the two mounting straps on the rear of the enclosure. Refer to Figure 1. Use the standard 3/8-inch bolts to secure the enclosure to the mounting surface. Secure the two bottom 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. Outdoor Station: The outdoor model stations are shipped with a separate glass-reinforced polyester enclosure with a front door. This enclosure has four 0.44-inch diameter mounting feet in the 4 corners and is suitable for mounting to many types of surfaces. Refer to Figure 2. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Figure 1. Mounting details for indoor stations \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Pub. 42004-156D Page: 3 of 12 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 4 of 12 Figure 2. Mounting details for outdoor stations (multi-party station shown) \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 5 of 12 Conduit Installation Refer to Pub. 42004-184 (US), 42004-238 (Canada) 42004-239 (Canada), as applicable. These publications detail how to maintain the integrity of the explosion-proof stations. NOTE External conduits in Class I, Groups 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 is mounted, use a 7/16-inch wrench to open the front cover to access the Termination PCBA. Refer to Pub. 42004-184 (US), and 42004-238 (Canada) or 42004-239 (Canada), as applicable 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 cover, 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. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Pub. 42004-156D Page: 6 of 12 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Speaker Muting Information These stations are 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. These stations are shipped from the factory with the mute feature enabled. To disable the muting feature, remove jumper W6 located on the 10489-001 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 The AUX/PAGE inputs to the amplifier are muted during station page (as shipped from GAI-Tronics). O X X O The AUX/PAGE inputs to the amplifier are not muted during a station page. O X O X Mute the PAGE input only during a station page. X X O X The PAGE input is muted during a station page or by contact closure between the Mute A and B inputs. X O X X The PAGE/AUX inputs are muted during a station page or by contact closure between the Mute A and B inputs. X O O O The 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 Muting Function Operation O = Not Installed. Mutual Muting Stations that are located closely together may require mutual muting of the page amplifiers. To set up mutual muting between stations, connect the orange (spare) wire in the GAI-Tronics station cable to TB211(A) on each of the Div. 1 stations that require muting. All the mutually muted stations are then muted when any connected station is paging. NOTE: Jumpers W4, W5, and W6 must be installed. 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 Div. 2 Enclosures (TB1-7) TB2-11(A) 7805-001 702A 758-001 780-001 732-101 703A 670-001 7325-101 733-001 7335-001 Consult GAI-Tronics for any enclosures not listed. NOTE: The auxiliary speaker amplifier input is a balanced 10 kilohm audio input. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 7 of 12 Operation GAI-Tronics offers two types of Page/Party® systems: Single party with one page line and one party line, and multi-party with one page line and five party lines allowing up to five simultaneous two-way conversations. For single party systems, complete the following steps to make a page announcement: 1. Lift the handset from the cradle. 2. Depress and hold the handset pressbar. 3. Speak directly into the microphone to broadcast your announcement over the loudspeakers. 4. Release the handset pressbar, and if requested, wait for a response. The paged individual(s) responds by picking up a station handset. For multi-party systems, complete the following steps to make a page announcement: 1. Lift the handset from the cradle. If party line conversation is desired, rotate the selector switch to an unoccupied party line. 2. Depress and hold the handset pressbar. 3. Speak directly into the microphone to broadcast your announcement over the loudspeakers. 4. Release the handset pressbar, and if requested, wait for a response. The paged individual(s) responds by picking up a station handset and turning the selector switch to the requested party line. With either type of system, the full duplex party line communication is not broadcast over the system speakers. Other individuals can also pick up and join the conversation at any time. Always return the handset to the cradle following a page or a party line conversation. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 8 of 12 Maintenance The following adjustments are accessible through the rear amplifier chassis using a small screwdriver. The handset/speaker amplifier section must be completely removed from the enclosure to access these controls. A silk-screen on the rear of the amplifier identifies the following controls. • Microphone Gain: adjusts the gain level from the microphone signal to the page or party lines. • Receiver Sidetone: adjusts the amount of signal transmitted from the microphone to the receiver. To properly adjust the sidetone, blow into the handset microphone while turning the sidetone adjustment. The sidetone is correctly set when the person blowing into the handset can barely hear themselves. • Receiver Volume: adjusts the gain level from the party line to the receiver. • Speaker Volume: adjusts the volume level of the speaker (if any) associated with this station. Troubleshooting The following table lists some hints to aid technicians in troubleshooting. Problem Solution Outgoing conversation level requires adjustment. Adjust the microphone gain at the amplifier. Incoming conversation level requires adjustment. Adjust the receiver volume control at the amplifier. Sidetone (how the operator hears himself) requires adjustment. 1. Adjust the receiver sidetone at the amplifier. Feedback occurs only during page. Ensure the muting feature is enabled. See the Mutual Muting section of this manual for details. Crosstalk occurs. One or more system cable pairs may be improperly terminated. Visually inspect the system cable connections for accidental crossing of the cable pairs or grounds. 2. Check that the system cable connections to the resistors in the line balance assembly are properly terminated. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 9 of 12 Specifications Power input .............................................. 90–140 V ac; 120 V ac nominal, 50–60 Hz; 0.5 amp maximum Dimensions: Indoor stations .......... 13.1 H × 7.9 W × 5.6 D (8.9 including handset) inches; (332 × 200 × 143 mm) Outdoor stations........................................ 14.6 H × 10.9 W × 10.5 D inches; (371 × 276 × 226 mm) Temperature range........................................................................... -22° F to +158° F (-30° C to +70° C) Shipping weight ........................................................... Indoor: 27 lbs. (12.2 kg); outdoor: 35 lbs. (11.7 kg) Handset Material/finish ........................................................................................................................... Gray ABS Microphone ......................................................................................... 10 ohms, noise-canceling, dynamic Receiver ...................................................................................................................... 150 ohms, dynamic Cable........................................................................... Retractile with sealed elbow, 6-foot extended length Handset Amplifier Output...................................................................................................... 1.5 V nominal into 33-ohm load Gain ............................................................................................................................... 55 dB, adjustable Frequency response............................................... 250–4000 Hz, +0/-3 dB ref @ 1 kHz (1.5 VRMS) output Distortion ................................................................................................. 1.5% maximum THD @ 1 kHz Preset adjustments ..................................................Microphone gain, sidetone adjustment, receiver volume Speaker Amplifier Output.................................................................... @ 120 V ac: 12 watt minimum into 8- or 16-ohm load Voltage gain ................................................................................................... 20 dB minimum, adjustable Frequency response........................................................................... 250–4000 Hz; +0/-3 dB ref @ 1 kHz Distortion ...................................................................................... 1% maximum THD @ 1 kHz/12 watts Input impedance....................................................................................... 50,000 ohm, minimum @ 1 kHz Controls, preset adjustments...............................................................................................Speaker volume Explosion-proof Enclosure Material/finish ...................................................................................................................Aluminum alloy Mounting..................................................................... Wall or column, four 3/8-inch slotted mounting feet Connections ...............................................................................Internal screw-type barrier terminal blocks Conduit entry................................ Standard hole size top: ¾ NPT; standard size hole bottom 1½-inch NPT Weatherproof Enclosure Material/finish ................................................................................................... Glass-reinforced polyester Mounting........................................................................................................................... Wall or column Environmental rating................................................................................................................ NEMA 4X Approvals NRTL certified for use in US and Canada ................................................. Class I, Div. 1, Groups C and D Class II, Div. 1, Groups E, F, and G Class III, Div. 1 \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations Pub. 42004-156D Page: 10 of 12 Replacement Parts Part No. Description 780-001 785-001 7805-001 7855-001 10108-007 Handset Assembly, 6-foot coil cord 10108-008 Handset Assembly, 15-foot coil cord 10108-009 Handset Assembly, 25-foot coil cord 10444-003 Weatherproof Enclosure 12251-001 Spring Door Kit 12502-101 Receiver Kit 12504-004 Replacement Door Handle 12505-004 Replacement Door Kit 12505-005 Replacement Door Kit 12511-001 Dynamic Transmitter and Cap 12519-001 Replacement Hook and Hinge Kit 12604-001 Fuse, 0.7A, (10 pack) 12604-002 Fuse, 1/16A, (10 pack) 13204-002 Receiver Cap 24201-009 Page Switch Knob 24201-010 Party-line Switch Knob 12542-001 Replacement Front Cover Bolts (14 pack) 61514-004 Harness Assembly 69012-002 PCBA Handset Safety Barrier 69488-101 PCBA Handset/Speaker Amplifier 69488-102 PCBA Handset/Speaker Amplifier 69489-001 PCBA Termination 12571-001 Maintenance Cover Kit \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Pub. 42004-156D Page: 11 of 12 Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc 03/04 Pub. 42004-156D Page: 12 of 12 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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