DIM Processing, Load Graph, DIM Model, Vol

= 137000 / (560 + 4700) = 26

MX4428 MXP Engineering / Technical Manual		Document: LT0273
MXP Loop Filter Board

9.8	DIM PROCESSING

9.8.1LOAD GRAPH

Figure 9.8 shows the V / I characteristics for the DIM detector terminals, together with the fault and alarm thresholds when using the default parameters. The shaded areas show the region of uncertainty.

Three lines are shown for three supply voltages.

	30		4k7 EOL
	30
	25	T
		T
		L	L
		U	L
tage	20	A	A
	20	F	M
			R
		O					M
Vol		O
	15	N			A	R		28V
		N		L				28V
								24V
Load			A


	10							19V
	5
	0
		0	10					20	30	40	50

Load Current (mA)

Figure 9.8 DIM LoadLine Characteristics

9.8.2DIM MODEL

The reading from the DIM module can be modelled using the following method. Calculate “R” from a point on the load line = Load Voltage / Load Current. Reading = 137000 / (560 + R)

For example take the point where the 4k7 EOL resistor crosses the 24V line.

R = 20.8 / .0044 = 4700

Reading

Note that for a given “R”, the reading is independent of the supply voltage.

9.8.3ALGORITHM - DIM800

The unverified input condition is evaluated according to the following table, depending on the values of parameters P1, P2, and P4. (if P4 is 0, assume it is 225).

Input		Condition (Mode 0)
P4	<= reading <= 255	Alarm
P1	<= reading < P4	Alarm
P2	<= reading < P1	Normal
0 <= reading < P2		Open circuit fault

Condition (Mode 1)

Short

Alarm

Normal

Open circuit fault

Changes in these states are verified as described in section 9.22.

Page 9-12

24 March 2006

Issue 1.5

MX4428 specifications

The Tyco MX4428 is a cutting-edge device known for its robust performance in the realm of wireless communication and sensor acquisition. Tailored for applications in various sectors, the MX4428 is particularly well-suited for industrial automation, environmental monitoring, and smart city initiatives. With its advanced features, the device has gained tremendous popularity among engineers and developers looking for reliability and efficiency in data transmission.

One of the standout features of the MX4428 is its exceptional range, which can extend up to several kilometers under optimal conditions. This long-range capability ensures that data can be transmitted over vast distances without degradation in quality, making it ideal for remote monitoring applications. Additionally, the device operates on multiple frequency bands, providing flexibility in deployment based on specific regional requirements and regulatory guidelines.

The MX4428 utilizes a highly efficient radio protocol that enhances data throughput while reducing power consumption. This asymmetric data transmission method allows for low-duty cycle operation, extending battery life and autonomy. The device's energy efficiency is particularly beneficial in applications where frequent battery replacement would be impractical, such as in environmental sensors and agricultural monitoring systems.

Furthermore, the MX4428 is equipped with comprehensive sensor integration capabilities. It can seamlessly interface with various sensors, making it a versatile choice for collecting a wide range of data types. From temperature and humidity sensors to motion detectors, the MX4428 can serve as a central hub for data gathering and transmission, providing real-time insights into environmental conditions.

Security is also a paramount consideration in the design of the MX4428. It incorporates robust encryption and authentication protocols to safeguard data integrity during transmission. This feature is crucial for applications involving sensitive information or those that require compliance with strict regulatory frameworks.

In summary, the Tyco MX4428 is a powerful and versatile device that boasts a combination of long-range communication, low power consumption, and comprehensive sensor integration capabilities. Its robust security features further enhance its appeal for critical applications across various industries. Whether for industrial, environmental, or smart city use cases, the MX4428 stands out as a reliable solution that meets the demands of modern wireless communication landscapes.

Tyco MX4428 technical manual DIM Processing, Load Graph, DIM Model, Vol, Input Condition Mode

Models: MX4428

DIM PROCESSING