Catalog Issued General Information

Transcription

1 9/0 series Mercury-Wetted Reed Relays Users should thoroughly review the technical data before selecting a product part number. It is recommended that users also seek out the pertinent approvals files of the agencies/laboratories and review them to ensure the product meets the requirements for a given application. 2 Ampere Capsule General Information The mercury-wetted contact relay represents one of the more sophisticated types of relays made today. The early pioneer work in mercury-wetted contact switching dates back to the 50 s, as telephone laboratory scientists sought out the perfect contact. Mercurywetted contacts represent the nearest thing to the perfect contact yet developed, being characterized by such parameters as: bounce-free operation; very low and stable contact resistance; hermetic protection; fast operating speeds; or contact, action contact life measured in billions of operations. The only major weakness of a mercurywetted contact relay is the necessity to mount the relay within 30 of a vertical position, due to its position sensitivity. While there are several variations of the mercury-wetted contact relay on the market, the basic contact element has essential concepts in common. The mercury-wetted contact element consists of a glass-encapsulated nickel-iron reed with its base immersed in a pool of mercury. The free reed cantilever projects upward between sets of stationary contact electrodes, which have been glass-sealed in proper juxtaposition at the top of the glass chamber. The mercury is induced to flow up the cantilever by capillary action, wetting mercury on both the cantilever contact tip as well as the stationary contacts. Thus a mercury-to-mercury contact is maintained on both the normally-closed and normally-open contacts, and the system is self-replenishing. The 2-ampere mercury-wetted capsule is shown far left. Along with the inherent fast actuation of the capsule and excellent load-handling capacity, the mercury-wetted contacts exhibit extremely long life, as the mercury films re-establish at each closure and contact erosion is eliminated. Contact interface resistance is very low and stable, and as the mercury films are elastic, contact bounce is eliminated. A dynamic sequence of the mercury-wetted contact action is shown below. While the below sequence portrays a (make-before-break) contact action, a true (break-before-make) contact can be provided by proper control of the mercury film dynamics and the contact electrode spacing. The mercury-wetted contact capsules generally are mounted within a coil assembly, and with appropriately mounted bias magnets, mounting base and magnetic shielded enclosures. The more popular assemblies contain one or two capsules in a convenient printed circuit mounting module. Mercury-wetted relays can be adjusted to operate with very low levels of input power, in the order of -20 milliwatts. Thus, power gain switching of as great as,000 can be realized. For all but very light contact loads, contact protection is required to limit the current or voltage rise time across the contacts. Mercury-Wetted Contact Action As Seen In High-Speed Sequence (1) Mercury (shown in black) covers armature and contact points; (2) and (3) as armature moves from open to closed position, mercury filament joins both contacts momentarily; (4) ruptured mercury surfaces accelerate away from each other, providing rapid breaking action; (5) as contact surfaces join, mercury wetting dampens rebound, eliminates electrical chatter, and provides contact reliability. SPDT ( or ) Contact Specifications Material Rating (Switched Load) (Carry Load) Bridging and Transfer Time Contact Resistance Life Expectancy Mercury-wetted 2 amperes 5 amperes When operated by a single milliohms typical; 1 billion platinum contacts maximum maximum DC pulse, the bridging or 20 milliohms maximum operations hermetically volts maximum Not switched transfer time will be greater Stable within minimum sealed in an 0 VA maximum than 50 microseconds, but ±2 milliohms at rated load inert atmosphere less than microseconds. throughout life. 308

2 Mercury-Wetted Relays Contact Protection Catalog 082 The essentially infinite life of mercury-wetted contact relays may only be realized if the requirements for suitable contact protection are observed. In that the goal is control of the rate of rise of voltage across the contacts when the circuit is opened (rather than peak transient limiting), the only suitable protection recognized is an RC network. Values of R and C may be calculated using the formula shown, or may be obtained from the direct reading nomograph. Nomograph Explanation I=Steady state current at time of circuit opening E=Open circuit voltage Find I on the ordinate scale. Read C on the scale adjacent to I. R is found at the intersection of I and E. To reduce voltage transient amplitudes, C may be increased up to times calculated values. (R must be calculated value.) For I=0.5 amps or less and E=50 volts or less R may be omitted C must be calculated value Resistor Tolerances E R Less than 70V R up to 2R 70V to 0V ±50% 0V to 0V ±% Greater than 0V ±5% Specifications Parameter 9 Series 0 Series Single Wound max. ohms 8,600 9,000 Double Wound max. ohms 4,275 4, Rating Watts Continous 1.75 Temp. Rise C per watt Dielectric Breakdown RMS, 60Hz 1,000 1,000 Insulation Resistance Megohms VDC 1,000 1,000 Capacitance Armature to Coi pf, Typical Electrostatic Shielding Optional yes yes Typical Operate Times ms, 2X Typical Release Times ms, 2X Contact Form Available, D, D Adjustments Available Single-side-stable yes yes Bi-stable yes yes Polar 1% Balance yes yes Temperature Range Operating C All types 38.8 C to + 85 C Storage C All types 65 C to + 0 C Weight ounces 0.5 Encapsulant Polyurethane Polyurethane Mounting Method PCB PCB 309

3 9 series Mercury-Wetted Reed Relays Features 9 series relays are available in a or 2 amp contact arrangement, single or dual coil and printed circuit board terminals. Weight: 1.0 ounce Positive potential applied to the start of the winding indicated by the symbol will close the contacts shown open on the electrical schematics. For reset of bistable relays, reversed polarity must be applied. Outline Dimensions Wiring Diagrams Single Coil ing System Double Coil Note: Relay must be mounted within 30 of vertical and suitable contact protection must be used. Relay Series Enclosure And Terminals Contacts And Adjustment Standard Or Special Ht.,.5 Lg Ht.,.6 Lg Ht.,.7 Lg Ht.,.250 Lg. 1 1D Single-Side-Stable 2 1D Bistable 5 1C Single-Side-Stable 6 1C Bistable 7 1C Dynamic (1%) Balanced Bistable 1A-1Z Single Coil 2K-2V Double Coil 7A-7T Single Coil 8A-8Z Bifilar Coil 9A-9Z Double Coil (Concentric) 1S and 2S Special 00 Standard A1-Z9 Special Customer Requirement Example: 9-1N00 is a 9 series relay, enclosure height of.625 in., pin length of.5 in., contact, single-side-stable adjustment, single coil 1N, of completely standard construction. Coil Characteristics and s One Winding Single-Side-Stable 40 Milliwatts Must Release 1A 1B 1C 1D 1E 1F A00 9-1B00 9-1C00 9-1D00 9-1E00 9-1F00 9-1A00 9-1B00 9-1C00 9-1D00 9-1E00 9-1F00 1G 1H 1J 1K 1L 1M G00 9-1H00 9-1J00 9-1K00 9-1L00 9-1M00 9-1G00 9-1H00 9-1J00 9-1K00 9-1L00 9-1M00 1N 1P 1Q 1R 1T 1U 1V ,450 2,430 3,620 5, 8, N00 9-1P00 9-1Q00 9-1R00 9-1T00 9-1U00 9-1V00 9-1N00 9-1P00 9-1Q00 9-1R00 9-1T00 9-1U00 9-1V00 3

4 9 Series (continued) Coil Characteristics and s Two Windings Single-Side-Stable 80 Milliwatts Per Winding Must Release Dielectric Stand Off Between 2K 2L 2M 2N 2P 70/70 1/1 0/0 325/ / K00 9-2L00 9-2M00 9-2N00 9-2P00 9-1K00 9-1L00 9-1M00 9-1N00 9-1P00 2Q 2R 2T 2U 2V 730/730 50/50 60/ / / Q00 9-2R00 9-2T00 9-2U00 9-2V00 9-1Q00 9-1R00 9-1T00 9-1U00 9-1V00 Two Windings Single-Side-Stable 40 Milliwatts Per Winding 2K 2L 2M 2N 2P 70/70 1/1 0/0 325/ / K00 9-2L00 9-2M00 9-2N00 9-2P00 9-2K00 9-2L00 9-2M00 9-2N00 9-2P00 2Q 2R 2T 2U 2V 730/730 50/50 60/ / / Q00 9-2R00 9-2T00 9-2U00 9-2V00 9-2Q00 9-2R00 9-2T00 9-2U00 9-2V00 Two Windings Bifilar Windings Bistable 40 Milliwatts Per Winding 8A 8B 8C 8D 8E 5/5 170/170 / 3/3 460/ A00 9-8B00 9-8C00 9-8D00 9-8E00 9-8A00 9-8B00 9-8C00 9-8D00 9-8E00 8F 8G 8H 8J 8K 675/675 8/8 00/00 40/ / F00 9-8G00 9-8H00 9-8J00 9-8K00 9-8F00 9-8G00 9-8H00 9-8J00 9-8K00 Note: All values at 25 C. Resistances specified are ±%. voltages based on 2 watts continuous dissipation. One Winding Single-Side-Stable 1 Milliwatts And Bistable 25 Milliwatts Nominal Resistance Current (MA-DC) Must Release Single-Side-Stable A00 9-7B00 9-7C00 9-7D00 9-7E00 9-7A00 9-7B00 9-7C00 9-7D00 9-7E00 Current (MA-DC) Bistable Must Release A00 9-7B00 9-7C00 9-7D00 9-7E00 9-7A00 9-7B00 9-7C00 9-7D00 9-7E F00 9-7G00 9-7H00 9-7J00 9-7K00 9-7F00 9-7G00 9-7H00 9-7J00 9-7K F00 9-7G00 9-7H00 9-7J00 9-7K00 9-7F00 9-7G00 9-7H00 9-7J00 9-7K L00 9-7M00 9-7N00 9-7P00 9-7Q00 9-7R00 9-7T00 9-7L00 9-7M00 9-7N00 9-7P00 9-7Q00 9-7R00 9-7T L00 9-7M00 9-7N00 9-7P00 9-7Q00 9-7R00 9-7T00 9-7L00 9-7M00 9-7N00 9-7P00 9-7Q00 9-7R00 9-7T00 3

5 0 series Mercury-Wetted Reed Relays Features 0 series relays are available in a single or two ampere contact arrangement, single or dual coil and printed circuit board terminals. The part numbers shown on the adjacent page are for relays with terminal spacing. The part number designator for the 0.0 grid is a 0-3XXXXX for a pin of 0.09 length, and 0-4XXXXX for a pin of 0.5 length. Positive potential applied to the start of the winding indicated by the symbol will close the contacts shown open on the electrical schematics. For reset of bistable relays, reversed polarity must be applied. Weight 0.5 ounces. UL File E55708 Note: Relay must be mounted within 30 of vertical and suitable contact protection must be used. Outline Dimensions Wiring Diagrams Grid (0-1) (0-2) Grid 0.0 (0-3) (0-4) Single Coil Double Coil ing System Relay Series Enclosures And Terminals Lg.,.093 Grid 2.5 Lg.,.093 Grid Lg.,.0 Grid 4.5 Lg.,.0 Grid Contacts and Adjustments 1 1D Single-Side-Stable 2 1D Bistable 5 1C Single-Side-Stable 6 1C Bistable 7 1C Dynamic (1%) Balanced Bistable 1A-1Z Single Coil 2A-2Z Double Coil 1S Special Single Coil 2S Special Double Coil Example: 0-1K00 is a 0 series relay, enclosure height of. in., pin length of.090 in., contact, single-side-stable adjustment, single coil 1K, of completely standard construction. Coil Characteristics and s Two Windings Bistable 20 Milliwatts Per Winding Coil Standard or Special 00 Standard A1-Z9 Special Customer Requirement Coil Must Not Operate (One Winding Only) Dielectric Standoff Between 2K 2L 2M 2N 2P 60/60 90/90 5/5 205/ / K00 0-2L00 0-2M00 0-2N00 0-2P00 0-2K00 0-2L00 0-2M00 0-2N00 0-2P00 2Q 2R 2T 2U 2V 2W 560/ /870 20/20 80/ /3000 4/ Note: All values at 25 C. Resistances specified are ±%. voltages based on 1.75 watts continuous dissipation Q00 0-2R00 0-2T00 0-2U00 0-2V00 0-2W00 0-2Q00 0-2R00 0-2T00 0-2U00 0-2V00 0-2W00 3

6 0 Series (continued) Coil Characteristics and s One Winding Single-Side-Stable 40 Milliwatts Must Release A00 0-1B00 0-1C00 0-1D00 0-1E00 0-1F00 0-1A00 0-1B00 0-1C00 0-1D00 0-1E00 0-1F G00 0-1H00 0-1J00 0-1K00 0-1L00 0-1M00 0-1N00 0-1G00 0-1H00 0-1J00 0-1K00 0-1L00 0-1M00 0-1N ,0 1,750 2,650 3,900 6,0 9, P00 0-1Q00 0-1R00 0-1T00 0-1U00 0-1V00 0-1W00 0-1P00 0-1Q00 0-1R00 0-1T00 0-1U00 0-1V00 0-1W00 Two Windings Single-Side-Stable 80 Milliwatts Per Winding Must Not Operate (One Winding Only) Dielectric Standoff Between 60/60 90/90 5/5 205/ / K00 0-2L00 0-2M00 0-2N00 0-2P00 0-1K00 0-1L00 0-1M00 0-1N00 0-1P00 560/ /870 1,320/1,320 1,980/1,980 3,000/3,000 4,/4, Q00 0-2R00 0-2T00 0-2U00 0-2V00 0-2W00 0-1Q00 0-1R00 0-1T00 0-1U00 0-1V00 0-1W00 3