Document: LT0273

MX4428 MXP Engineering / Technical Manual

 

Device Information and Programming

 

 

3.17

CIM800 CONTACT INPUT MODULE

3.17.1GENERAL

The CIM800 Contact Input Module is suitable for interfacing voltage free contacts, e.g. switches, relay contacts, flow switches, or non-indicating detectors. It has two inputs, the state of which are ORed together to generate the point status. Therefore unused inputs must be terminated with the EOL resistor.

The CIM800 may be used in normally open or normally closed configurations, and the normally open configuration may or may not include short circuit fault monitoring. Refer to Figure 3.5 for wiring topology.

The normal response time to an input change of state is 0 – 5 seconds, as each device is polled at 5 second intervals by the MXP. If faster operation is required, interrupt operation can be enabled. Interrupt operation allows a change to be signalled by the device so that the MXP detects the change immediately, rather than waiting for the next poll of the device.

The CIM800 can only interrupt on “closing” contacts, and interrupt operation is only applicable for normally open contacts. Transitions from closed to open will always require up to 5 seconds to be recognised. Therefore it cannot be used for callpoints on NZ systems.

Fault supervision is provided by default with a 200Ω EOL resistor - open circuit fault in a normally open configuration and short circuit fault in a normally closed configuration. In addition the normally open configuration can be programmed to also generate fault on short circuit. In this case only one alarm contact is allowed, a 100Ω resistor must be wired in series with the alarm contacts, and the fault threshold must be specially programmed - set Parameter 2 to 176.

Recognition of a fault condition takes about 30 seconds.

WARNING

DO NOT JOIN INPUT WIRING BETWEEN INPUTS OR MODULES OR TO ANYTHING OTHER THAN VOLTAGE FREE CONTACTS

3.17.2CIM800 SPECIFICATIONS

Dimensions

Height: 61mm Width: 84mm

Depth: 25mm

Weight

100g

 

Line Connections

L-, L+

 

Supply Voltage

20V – 40V

 

Supply Current

Standby Current : 275uA (typical)

 

 

LED on : 2.8mA (typical)

 

Contact Inputs

Monitoring Voltage

5V

 

Line Resistance

10Ω max

 

EOL

200Ω + / - 5%.

 

Alarm Resistance

100Ω + / - 5% (if used).

Issue 1.5

24 March 2006

Page 3-35

Page 50 Page 52
Page 51
Image 51
Tyco MX4428 technical manual CIM800 Contact Input Module, 17.2 CIM800 Specifications
Page 50 Page 52

MX4428 specifications

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