www.clare.com ds-M-949-11-r02 1 M-949-11 line sense relay part # description M-949-11 loop current sensing relay features description ordering information ? meets ul and british standard specifications ? designed for use with fcc part 68 certified equipment ? temperature ranges from -25o to 70oc ? senses telephone line current from 15 to 200 ma ? includes a 1-form-a relay contact ? achieves excellent longitudinal balance ? meets high-voltage isolation requirements up to 4,000 volts ? filters common-mode noise through dual coils the M-949-11 line sense relay is a small, pcb- mounted loop current detector with the safety and reliability features required for ul and british standard (bsi) regulated telephone applications. the M-949-11 is designed for both north american and international use, and offers superior protection against voltage surges such as lightning strikes. when connected to the voice pair (tip and ring) of an ordinary telephone line, the M-949-11 provides a 1-form-a relay closure in response to current flowing through the wires. this closure can be used with control circuitry for on-hook/off-hook monitoring, switch hook flash detection, and rotary dial pulse counting. the M-949-11 is ideally suited for use with the teltone m-959 dial pulse counter and other loop-current applications, including microprocessor-based designs. applications ? telephone exchange products ? pbx and key systems ? station message detail reporting (smdr) systems figure 1. electrical configuration figure 2. typical application: dialed digit monitor
www.clare.com 2 M-949-11 r02 absolute maximum ratings are stress ratings. stresses in excess of these ratings can cause permanent damage to the device. functional operation of the device at conditions beyond those indicated in the operational sections of this data sheet is not implied. absolute maximum ratings parameter ratings units dc supply voltage 6 v any input voltage relative to v dd +0.3 v any input voltage relative to v ss -0.3 v operating temperature range -40 to +85 c storage temperature range -55 to +125 c parameter conditions min max units notes dual coils pick-up current -25oc to 70oc ambient 15 - ma 1 drop-out current - - 5 ma 1 continuous coil current 20oc ambient - 200 ma 2 coil resistance - each coil - 8.1 9.9 - coil inductance - each coil - - 1.5 mh 3 coil inductance - both coils in series - - 6 mh 3 longitudinal balance - 63 - db 4 coil to coil capacitance (at 1khz) - - 2500 pf - excitation to closure time (including bounce) - - 0.5 ms 5 excitation removal to open time - - 0.1 ms - relay contact voltage rating - - 90 v dc - current rating - - 500 ma - power (resistive) rating - - 10 w 6 rated life - - 10 6 operations 7 --10 8 operations 8 dielectric strength open contacts - 100 - v dc - coil to coil - 250 - v dc - coil to contact - 4000 - v dc - ambient temperature operating 85% -25 70 oc 9 non-operating (storage) 95% -40 85 oc 9 1 with coils in series-aiding con? guration. 2 with the current continuously applied. 3 at 1khz. 4 with current of 15-200ma at 1khz. 5 with current of 15ma and coils in series-aiding con? guration. 6 maximum initial contact resistance < 1 7 10o at 10w (resistive). 8 10o at 5w (resistive). 9 relative humidity. electrical characteristics
clare, inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publica tion and reserves the right to make changes to specifications and product descriptions at any time without notice. neither circuit patent licenses nor indemnity are expressed or implied. except as set forth in clare?s standard terms and conditions of sale, clare, inc. assumes no liability whatsoever, and disclaims any express or implied warranty, relating to its products incl uding, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right. the products described in this document are not designed, intended, authorized or warranted for use as components in systems in tended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of clare?s product may result in direct physical harm, i njury, or death to a person or severe property or environmental damage. clare, inc. reserves the right to discontinue or make changes to its products at any time without notice. specification: ds-M-949-11-r02 ?copyright 2009, clare, inc. all rights reserved. printed in usa. 1/16/09 for additional information please visit our website at: www.clare.com 3 M-949-11 mechanical dimensions pwb pattern top view 14 10 9 7 3 2 7.62 typ. (0.30 typ.) 2.54 typ. (0.10 typ.) 0.4 - 0.6 dia. (0.016 - 0.024 dia.) teltone M-949-11 10.7 - 10.9 (0.421 - 0.429) pin 1 indicator 20.6 - 20.8 (0.811 - 0.819) 0.2 - 0.4 (0.008 - 0.016) 3.3 - 3.5 (0.130 - 0.138) 10.5 - 10.7 (0.413 - 0.421) 0.75 dia. (0.030 dia.) dimensions mm (inch)
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