Monitor system

1. Module Overview

AN5800/50 Thermal Expansion monitoring module receives signals from two LVDT sensor; the original signals from the sensor are converted into digital signals by a signal interface unit; the digital signals are transmitted to an embedded microcontroller unit (MCU), and are then identified, judged, processed and compared by software and output by output units, thus implementing online monitoring and protection of device Thermal Expansion.

2. Purposes

Online monitoring of rotary machine Thermal Expansion; 

Online monitoring of Valve opening;

3. Functions

Digital display unit: To display real-time value;

Serial communication interface: Parameter configuration and digital signal bus communication through AN5800 / CFG configuration software ;

Standard signal output: 4-20mA;

On-off output: two-stage alert normally open/closed contact output;

LED indicator: To display various statuses;

Buffer interface: The front panel BNC connector and rear terminal buffer output (Sensor original signal) are convenient to connect the data acquisition system to collect dynamic signals.


4. Features

Perfect self-inspection and diagnosis function; when a failure occurs, current output is 0mA, and "Not Ok" LED on the panel is on;

Embedded microcontroller unit (MCU); an E2PROM data storage unit (for important parameters) and a FLASH process program storage unit are integrated in the chip;

Power unit: a DC-DC/AC-DC module power supply realizes ultra-width power input and isolated output;

Use forward board and back board plug-in module type structure design, after the board (power supply and relay output) and the former board (signal processing, the host) physical isolation, through case motherboard more redundant connectors (needle) in parallel connection, stable and reliable.

5. Application

Application Fields:

Power plants (thermal, hydro, nuclear and wind)

Metallurgy (steel mills and aluminium manufacturers, etc.)

Petrochemical engineering (refining and chemical, coal chemical industry and chemical fertilizers, etc.)



Mine (coal and iron mines)

Hydraulic engineering (reservoirs and pump stations), etc.

Monitored equipment:

Steam turbines;


Water pumps;

Air blowers;

Rotary machines like Water turbines.

6. Technical Specifications


Linear Variable Differential Transformer (LVDT) : 


0-25mm, 400 mV /mm

0-50mm, 200 mV /mm

Output voltage: 0 ~ 10VDC;

Range of measurement:

0-25mm; Resolution: 0.01mm; Precision: 0.5%±0.01mm.

0-50mm; Resolution: 0.01mm; Precision: 0.5%±0.01mm.

Power supply:

DC supply: 24VDC (18-36V);

Overall power consumption : Less than 5W.

Standard signal output:

Active 4-20mA (corresponding to upper range)

Drive load: ≤750Ω

Effective transmission distance: ≤ 300m (1,000 feet).

Relay output:

Two-stage threshold (Alert, Danger) programmable setting, normally open/closed dry contact output, configurable whole range, with an error ≤0.1%;

Insulation resistance: ≥1000MΩ;

Contact capacity: 2A/30VDC, 1A/220VAC, double-pole double-throw (DPDT);

Alarm-delay: 0.1-60S, default: 0.5S;

Alert lock: Defaulting to non-locking.

Physical property:

Before the board: 

Size: 248(L)×40(W)×262(H)mm;9.8(L)×1.5(W)×10.3(H)in;

Weight: 0.6kg.

After the board: 

Size: 128(L)×40(W)×262(H)mm;9.8(L)×1.5(W)×10.3(H)in;

Weight: 0.3kg.

Environmental restrictions:

Operating temperature: -30℃ ~ +65℃ (-22oF ~ +150 oF);

Storage temperature: -40℃ ~ +85℃ (-40oF ~ +180 oF);

Relative humidity: 0 ~ 95% non-freezing.

Executive standards

The United States Petroleum Association Standard: API 670

Safety certificate: CE;

Protection level: IP56;

Anti-electromagnetic interference: EMC/LVD

Refer to EN55011\ EN 61010\ EN50081\EN50082.

7. Ordering information

Standard Configuration Model: AN5800/50- AXX-BXX-CXX

Thermal Expansion:



A: The channel number

00—2 channe

01— 1 channel (channel A on top of module by default)

B: Sensor type:

25— AN1950 LVDT sensor (0-25mm)

50— AN1950 LVDT sensor (0-50mm)

C: Relay output (DPDT):

00—Three relay dry contact output (Alert, Danger, Not-ok)

01—Double relay dry contact output (Alert, Danger)

02—Single relay dry contact output (Alert)

03—No relay output



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