M-949-11 Data Sheet

M-949-11
Line Sense Relay
INTEGRATED CIRCUITS DIVISION
Features
• 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
Applications
• Telephone Exchange Products
• PBX and Key Systems
• Station Message Detail Reporting (SMDR)
Systems
Description
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.
Figure 1. Electrical Configuration
Ordering Information
Part #
M-949-11
Description
Loop Current Sensing Relay
Figure 2. Typical Application: Dialed Digit Monitor
DS-M-949-11-R04
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1
INTEGRATED CIRCUITS DIVISION
M-949-11
Electrical Characteristics
Parameter
Conditions
Min
Max
Units
Notes
15
8.1
63
-
5
200
9.9
1.5
6
2500
0.5
0.1
mA
mA
mA

mH
mH
dB
pF
ms
ms
1
1
2
3
3
4
5
-
Dual Coils
Pick-Up Current
-25ºC to 70ºC Ambient
Drop-Out Current
Continuous Coil Current
20ºC Ambient
Coil Resistance - Each Coil
Coil Inductance - Each Coil
Coil Inductance - Both Coils in Series
Longitudinal Balance
Coil to Coil Capacitance (at 1kHz)
Excitation to Closure Time (Including Bounce)
Excitation Removal to Open Time
Relay Contact
Voltage Rating
Current Rating
Power (Resistive) Rating
Rated Life
-
-
90
500
10
106
108
VDC
mA
W
operations
operations
6
7
8
Open Contacts
Coil to Coil
Coil to Contact
-
100
250
4000
-
VDC
VDC
VDC
-
85%
95%
-25
-40
70
85
ºC
ºC
9
9
Dielectric Strength
Ambient Temperature
Operating
Non-Operating (Storage)
1
2
3
4
5
6
7
8
9
2
With coils in series-aiding configuration.
With the current continuously applied.
At 1kHz.
With current of 15-200mA at 1kHz.
With current of 15mA and coils in series-aiding configuration.
Maximum initial contact resistance < 1
10º at 10W (resistive).
10º at 5W (resistive).
Relative humidity.
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R04
INTEGRATED CIRCUITS DIVISION
M-949-11
Mechanical Dimensions
0.75 dia.
(0.030 dia.)
20.6 - 20.8
(0.811 - 0.819)
Teltone
M-949-11
PWB Pattern
Top View
14
7.62 typ.
(0.30 typ.)
10 9
10.7 - 10.9
(0.421 - 0.429)
2 3
Pin 1 Indicator
7
2.54 typ.
(0.10 typ.)
0.2 - 0.4
(0.008 - 0.016)
3.3 - 3.5
(0.130 - 0.138)
10.5 - 10.7
(0.413 - 0.421)
Dimensions
mm
(inch)
0.4 - 0.6 dia.
(0.016 - 0.024 dia.)
For additional information please visit our website at: www.ixysic.com
IXYS Integrated Circuits Division makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication 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 IXYS Integrated
Circuits Division’s Standard Terms and Conditions of Sale, IXYS Integrated Circuits Division assumes no liability whatsoever, and disclaims any express or implied warranty, relating to
its products including, 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 intended for surgical implant into the body, or in other
applications intended to support or sustain life, or where malfunction of IXYS Integrated Circuits Division’s product may result in direct physical harm, injury, or death to a person or severe
property or environmental damage. IXYS Integrated Circuits Division reserves the right to discontinue or make changes to its products at any time without notice.
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Specification: DS-M-949-11-R04
©Copyright 2014, IXYS Integrated Circuits Division
All rights reserved. Printed in USA.
6/12/2014