Fieldbus to Analog Current Signal Converter

Fieldbus to Analog Current Signal Converter: NCS-FI105 is an intelligent fieldbus instrument and complies with FF Fieldbus Specification. It can be interlinked with several FF equipment. Abundant function blocks are integrated into NCS-FI105, and so it can complete not only the general measuring but also the complex controlling strategy. According to the requirement and actual application environment. the users can choose different function blocks to implement different function.

NCS-FI105 utilizes digital technology, which simplifies the interface between the control center and the field equipment. And so the expense of installing, running and maintenance can be reduced.

NCS-FI105 converter convert fieldbus signal signal to input current(4-20mA).

NCS-FI105 converter is consisted of five components, as shown in picture.  

Terminal board: it is used to connect with fieldbus, current output signal, D/A board and communication board.  

D/A board: it can convert digital signal provided to communication board to input current signal.

Communication card: it is core component of intelligent instrument, which implements the communication, control, diagnosis and maintenance of Foundation Fieldbus.

Isolation board: it is used for isolation between communication board and instrument board (power isolation and signal isolation).  

LCD Card (optional): it is used to display function block parameters.

Features

As a conversion device, NCS-FI105 converter can receive Foundation fieldbus signal and convert to 4-20mA analog signal of 4 channels.

1. Fieldbus signal to analog signal converter

2. Supports 4-channel (4~20mA) analog current output

3. High precision (±0.05% at room temperature), low temperature drift (±50ppm/℃)

Number of channels: 4

Output of signal: 4-20mA

Bus signal: 31.25kbit/s

Power: 9-32VDC

Current consumption(static)：to14mA

Excellent Performance

-- High precision: ±0.05% full range

-- Low temperature drift: <50ppm/℃

The Multichannel

-- Supports 4-channel current output

Multi-Protocol Support

-- FF and PA protocols can be supported

Converter Parameters

Basic Parameters 

Input Signal: 4～20ma

Channels: 4 Channels

Current Output: Npn Collector Output

Power Supply: 9 ～ 32 Vdc ;Current Dissipation (Static): ≤ 14ma

Fieldbus Signal: Communication Baudrate 31.25kbit/s, Current-Mode

Insulation: Between Housing And Terminal Board:

500 Vrms (707 VDC)

Display: 6 Bits Digital Number And 5 Bits Characters LCD Display (Optional)

Temperature Range: - 40 ～ 85℃ (No Display)

- 30 ～ 70℃ (Display)

Humidity Range: 0% ～ 100% Rh

Start Time: ≤ 5s

Protection Grade: IP 65

EMC Designed to comply IEC 61000

Converter Technical Performance

Accuracy: < 0.05 %

Maximum Load: 1350Ω

Load Power: 9 ～ 32VDC

Note: Supply Voltage: ≥ (Output Current * Load Resistance + 5VDC) 

Temperature Effect: < ± 50 ppm/℃

Converter Physical Performance

Electrical Connection: 1/2 - 14 NPT

Material of Construction: Aluminum

Weight: 1.1kg 

Converter Dimension&Structure

Size of NCS-FI105 Converter

Structure of NCS-FI105 Converter

As the core of NCS-FI105 converter, the Communication Card connects with terminal board, isolation board, D/A board and LCD board. The LCD board rotated in four angles is fixed on the Communication board, as picture shows.

Installation 

For installation of NCS-FI105 converter, three types of bracket (pipe mounting flat bracket, plate mounting angle bracket and pipe mounting angle bracket) are provided. Accordingly there are three installation methods as the following.

The installation of pipe mounting flat bracket: the typical installation as Figure 2.1 shows. Fix NCS-FI105 converter in flat bracket using four bolts provided, and then fix the flat bracket on the vertical pipe in Φ50mm around through the U-shape bolt provided.

The installation of plate mounting angle bracket: the typical installation as Figure 2.2 shows. Fix NCS-FI105 converter in angle bracket using four bolts provided, and then fix the angle bracket on the plate through the M10 bolt not provided.

The installation of pipe mounting angle bracket: the typical installation as Figure 2.3, 2.4 shows. Fix NCS-FI105 converter in angle bracket using four bolts provided, and then fix the angle bracket on the horizontal pipe in Φ50mm around through the U-shape bolt provided.