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Tyco MX4428 technical manual 23 LPS800 Loop Powered Sounder Module, 23.2 LPS800 Specifications

Models: MX4428

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Document: LT0273

MX4428 MXP Engineering / Technical Manual

 

Device Information and Programming

3.23 LPS800 LOOP POWERED SOUNDER MODULE

3.23.1GENERAL

The LPS800 Loop Powered Sounder Module is suitable for 24V DC outputs powered by the MX Loop. It can supply up to 75mA at 24VDC.

When inactive, a reverse polarity supervision is applied to the load wiring. The load devices must therefore have reverse blocking diodes.

The load supervision can detect short and open circuit states on the load wiring only when the output is inactive.

The load must be isolated from ground and all voltage sources. All inductive loads (e.g. bells or relays) must have back-emf diodes or other noise clamping devices fitted.

Recognition of a fault condition takes about 30 seconds.

3.23.2LPS800 SPECIFICATIONS

Dimensions

Height: 87mm Width: 148mm Depth: 14mm

Weight

100g

Line Connections

L-, L+

Supply Voltage

20V – 40V

Supply Current

Standby Current : 450uA (typical)

 

Operated with load up to 8mA : 12mA.

 

Operated with load over 8mA : Load current + 4mA

Output Circuit ELD

22k ohms, 0.5 watt

Output Current Rating

75mA@24V nominal.

Voltage Drop

2V max

Note that the LPS800 has a minimum voltage drop of 2V between the line voltage and the output terminals. When the loop voltage is less than 26V, the output voltage may be less than 24V. At the minimum loop voltage of 20V, only 18V will be available for the sounder devices. From this you must subtract the voltage drop in the wiring to the sounder devices to obtain the voltage at the sounder device terminals. You must ensure the sounder devices operate correctly at this voltage.

Alternatively you must design the loop so that the minimum voltage is higher than 20V and sufficient to give the required voltage at the sounder terminals. Refer to section 3.2.2 for loop voltage drop calculations.

The load must be isolated from ground and all supplies.

3.23.3MX4428 PROGRAMMING OPTIONS - LPS800

The LPS800 is programmed as an SNM800. Refer to section 3.22.4.

Issue 1.5

24 March 2006

Page 3-47

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Tyco 23 LPS800 Loop Powered Sounder Module, 23.2 LPS800 Specifications, 23.3 MX4428 Programming Options LPS800
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MX4428 specifications

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