Document: LT0273

MX4428 MXP Engineering / Technical Manual

 

Device Information and Programming

3.22 SNM800 SOUNDER NOTIFICATION MODULE

3.22.1GENERAL

The SNM800 Sounder Notification Module is suitable for relay outputs which require supervision of the load wiring and optional supervision of the DC power supply (if any).

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

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

The 24V DC supply may be supervised.

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.

3.22.2SNM800 SPECIFICATIONS

Dimensions

Height: 61mm Width: 84mm Depth: 25mm

Weight

100g

Line Connections

L-, L+

Supply Voltage

20V – 40V

Supply Current

Standby Current : 450uA (typical)

 

LED On : 3.0mA (typical)

Output Circuit EOL

27k ohms, 0.5 watt

Contact Rating

2A 30Vdc

Load must be isolated from ground and all supplies.

Issue 1.5

24 March 2006

Page 3-45

Page 60 Page 62
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Tyco MX4428 technical manual 22 SNM800 Sounder Notification Module, 22.2 SNM800 Specifications
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MX4428 specifications

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