Pepperl+Fuchs RSD-CI2-Ex8 Analog Input Module

Pepperl+Fuchs RSD-CI2-Ex8 Analog Input Module

RSD-CI2-Ex8 is an 8-channel analog input module launched by Pepperl+Fuchs, which focuses on signal acquisition and safety isolation in hazardous areas. It is suitable for 2-wire transmitter power supply and current signal transmission in industrial scenarios, with high safety, stability, and flexible functional configuration.

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Core Features and Functions

Channel and signal support

8 independent channels, compatible with two input types: 2-wire transmitter (4-22mA) and current source (0-22mA).

To provide power supply for transmitters in hazardous areas, the available voltage at the transmitter end under 20mA current is not less than 15.5V, meeting the requirements of most industrial transmitters.

Adaptability to hazardous areas

Installation environment: Supports Zone 1, Zone 2 (gas hazardous area), and Zone 22 (dust hazardous area).

Explosion proof protection: Complies with multiple explosion-proof standards (EN 60079-0/11/26, etc.), protection type EEx ia/ib IIB/IIC, temperature level T4, and needs to be used in conjunction with a dedicated intrinsic safety power supply (RSD2-PSD2-Ex4.34 or RSA6-PSD-Ex4.34).

Hot swappable function: It can replace modules with electricity in Zone 1 hazardous areas without power outage, improving operation and maintenance efficiency.

Signal Processing and Protection

Signal isolation: Implement safe electrical isolation between input, bus, and power supply (EN 60079-11 standard), with a peak isolation voltage of 60V, to avoid interference and fault propagation.

Filtering and accuracy: Built in 10Hz anti aliasing filter, with customizable filtering parameters; 16 bit resolution, with a deviation of only 0.1% in the input signal range at 25 ℃, and a temperature drift coefficient of 0.0025%/K, ensuring measurement accuracy.

Fault monitoring: Each channel has the function of monitoring disconnection (LB, triggered by current ≤ 3.6mA) and short circuit (SC, triggered by voltage ≤ 4V). When a fault occurs, the corresponding channel's LED flashes red and is fed back to the control system through the internal bus.

Technical parameters

1. Power supply and bus

Category parameter details

Power supply connection terminals 34 and 50 (V+); 35, 51 (V -)

Rated voltage 8.88-9.5V

Power loss of 5.2W; Power consumption 8.5W

Internal bus backplane bus, manufacturer customized interface, cycle time 1.6ms

2. Input characteristics

Parameter values

Input resistance 22 Ω

Step response of 60ms (0-90% measured value, under minimum filtering setting)

Intrinsic safety parameters (input) Uo=23.7V, Io=92.5mA, Po=548mW; External capacitance Co=66nF, external inductance Lo=2.5mH

3. Environment and Machinery

Environmental condition parameters

Working temperature -20-70 ℃ (253-343K); Storage temperature -20-100 ℃ (253-373K)

Relative humidity 95% (no condensation)

Anti disturbance impact 15g (11ms), vibration 2g (10-500Hz, IEC 60068-2-6)

Protection level IP20 (module itself), on-site installation requires at least IP54 rated enclosure

Mechanical installation DIN rail installation, weighing approximately 250g; wiring terminals support a maximum wire diameter of 2.5mm ²

Installation and usage precautions

Wiring and protection: Shielded power lines and channel signal lines are required to meet EMC (NAMUR NE 21 standard) requirements, with wire insulation strength ≥ 500V; input channels share the negative terminal (common terminal), and polarity should be noted when wiring.

Certification and Compliance: Compliance with EC Type Examination Certificate (DMT 98 ATEX E 017 X) and Declaration of Conformity is required. Relevant documents can be found on the official website of Beijiafu.

Alarm configuration: Supports alarm functions such as over range, under range, and disconnection. The alarm display of each channel can be independently configured to meet the fault response requirements of different scenarios.