Brand: Pepperl+Fuchs
Model: RSD-CI-Ex8
Order No.: 39067
Type: 8-Channel Intrinsically Safe Analog Input Module
Series: IS-RPI
Core Function: Intrinsically Safe 0/4–20 mA Signal Acquisition and Transmitter Power Supply
Country of Origin: Germany
Condition: New / Used / Refurbished
Availability: Industrial Spare Parts
Warranty: 12 Months
Pepperl+Fuchs RSD-CI-Ex8 39067 Analog Input Module
The Pepperl+Fuchs RSD-CI-Ex8, Order No. 39067, is an 8-channel intrinsically safe analog input module from the Pepperl+Fuchs IS-RPI Remote Process Interface system.
The module is designed to supply and monitor up to eight 2-wire transmitters installed in hazardous areas. It transfers the measured analog signals to the safe area through the fieldbus system. It can also be used for intrinsically safe isolation of current-source signals.
The RSD-CI-Ex8 is therefore not simply a conventional analog input card. It combines transmitter power supply, intrinsically safe signal separation, and analog input signal transmission within the IS-RPI architecture.
Main Functions
- 8-channel analog inputThe module provides eight analog input channels, numbered 0 through 7, for process measurement signals.
- 2-wire transmitter power supplyThe RSD-CI-Ex8 can supply up to eight 2-wire transmitters installed in the hazardous area while transferring their measurement values through the fieldbus.
- 0/4–20 mA signal processingThe module handles standard process current signals in the 0/4–20 mA range. It can also provide intrinsically safe separation for current-source signals up to the specified input range.
- Intrinsically safe interfaceThe inputs are designed for hazardous-area applications and are specified for EEx ia IIC circuits. The module can be installed in Zone 1, Zone 2, or Zone 22 applications according to the applicable system and certification requirements.
- Line fault monitoringEach field circuit provides monitoring for lead breakage and short circuit. Channel LEDs indicate the corresponding fault condition.
- Hot-swappable designPepperl+Fuchs documentation specifies that the module can be exchanged under voltage in Zone 1 when the applicable IS-RPI installation requirements are followed.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Pepperl+Fuchs |
| Order Number | 39067 |
| Model | RSD-CI-Ex8 |
| Product Type | Analog Input / Transmitter Supply Module |
| System | IS-RPI |
| Number of Channels | 8 |
| Input Signal | 0/4–20 mA |
| Transmitter Type | 2-wire transmitters |
| Hazardous-Area Interface | Intrinsically Safe |
| Input Protection | EEx ia IIC |
| Field Installation | Zone 1 / Zone 2 / Zone 22, subject to system certification |
| Fault Monitoring | Lead Breakage / Short Circuit |
| Isolation | Galvanic isolation between inputs, bus and power supply |
| Mounting | DIN rail / IS-RPI terminal base |
| Protection Degree | IP20 |
| Approx. Mass | 250 g |
| Operating Temperature | -20 to +70°C |
| Storage Temperature | -20 to +100°C |
The published technical data identifies an approximate mass of 250 g, DIN-rail mounting, IP20 protection, and an operating temperature range of -20 to +70°C. For on-site installation, the documentation specifies that a separate enclosure with at least IP54 protection is required.
Hazardous-Area Application
The RSD-CI-Ex8 is designed specifically for process measurement applications where transmitters are installed in potentially explosive atmospheres.
Typical field instruments can include:
- Pressure transmitters
- Differential-pressure transmitters
- Flow transmitters
- Level transmitters
- Process analyzers
- Other 2-wire 4–20 mA transmitters
The hazardous-area transmitter is connected to the RSD-CI-Ex8, while the module provides the required intrinsically safe interface and transfers the measurement value into the control system through the IS-RPI fieldbus architecture.
IS-RPI System Integration
The RSD-CI-Ex8 is one component within the Pepperl+Fuchs IS-RPI system. The wider IS-RPI product family includes analog input, temperature, frequency, binary input, analog output, valve control, power supply, and communication modules.
The official Pepperl+Fuchs system documentation lists the RSD-CI-Ex8 as an 8-channel transmitter power supply device, alongside related modules such as the RSD-CI2-Ex8 current repeater and RSD-CI-Ex8.H HART version.
This makes the distinction between the following models particularly important:
| Model | Main Function |
|---|---|
| RSD-CI-Ex8 | 8-channel analog input / transmitter power supply |
| RSD-CI2-Ex8 | 8-channel current repeater |
| RSD-CI-Ex8.H | 8-channel analog HART input |
| RSD-BI-Ex16 | 16-channel binary input |
| RSD-TI-Ex8 | 8-channel temperature input |
| RSD-UO-Ex8 | Analog output / driver-repeater |
The RSD-CI-Ex8.H is not the same product as the RSD-CI-Ex8. The HART version additionally provides HART signal transfer, while the standard RSD-CI-Ex8 is intended for conventional analog current signals.
Electrical and Intrinsic Safety Characteristics
The RSD-CI-Ex8 provides galvanic isolation between the input circuits, internal bus, and power supply. Pepperl+Fuchs documentation specifies that at least 15.5 V is available to the connected transmitter at a 20 mA current flow in the hazardous area.
The published technical data also identifies an intrinsically safe protection concept including Ex ib[ia] IIC T4, with the exact permitted installation determined by the applicable certificate, terminal base, power supply, and local hazardous-area requirements.
Installation and Compatible Terminal Base
The RSD-CI-Ex8 is not intended to be installed as a completely standalone electronic module. Pepperl+Fuchs instructions specify that the RSD-CI-Ex8/RSD-CI2-Ex8 must be used with the appropriate RS-TB-Ex.SC or RS-TB-Ex.SP intrinsically safe terminal base.
The terminal base also uses a module-specific key position to prevent an incompatible module from being inserted into the installation.
For replacement orders, therefore, it is useful to verify both the module part number and the existing terminal-base configuration.
Typical Applications
The Pepperl+Fuchs RSD-CI-Ex8 can be applied in:
- Oil and gas facilities
- Petrochemical plants
- Refineries
- Chemical processing plants
- Tank farms
- Process measurement systems
- Hazardous-area instrumentation
- Industrial process control
- Remote I/O installations
- DCS and PLC field instrumentation interfaces
Its main advantage is the ability to connect multiple hazardous-area 4–20 mA transmitters to a control-system architecture while maintaining the required intrinsic-safety interface.
Replacement & Procurement Considerations
When sourcing RSD-CI-Ex8, buyers should verify the following information:
- Exact model: RSD-CI-Ex8
- Pepperl+Fuchs Order No.: 39067
- Whether the required module is standard analog input or the HART version
- Existing IS-RPI system configuration
- Terminal base type
- Hazardous-area certification requirements
- Field transmitter type
- Required number of channels
- Module condition
- Existing fieldbus architecture
A common procurement mistake is to substitute RSD-CI-Ex8.H for the standard RSD-CI-Ex8 simply because both models have eight analog channels. The HART version has additional communication functionality and should only be selected when the installed system requires it.
Verification & Quality Control
Before shipment, each Pepperl+Fuchs 39067 should be checked for:
- Correct model and Order No.
- Pepperl+Fuchs identification label
- Terminal and connector condition
- Housing condition
- DIN-rail mounting mechanism
- Channel LED condition
- Signs of corrosion or overheating
- PCB condition where inspection is possible
- Input/output continuity where applicable
- Compatibility with the customer’s existing IS-RPI system
For used or surplus industrial automation stock, actual photos of the nameplate and front connector area are recommended before shipment so the customer can confirm the exact version.
Related Pepperl+Fuchs Models
Pepperl+Fuchs RSD-CI-Ex8 – 8-channel analog input / transmitter power supply
Pepperl+Fuchs RSD-CI2-Ex8 – 8-channel current repeater
Pepperl+Fuchs RSD-CI-Ex8.H – 8-channel HART analog input
Pepperl+Fuchs RSD-BI-Ex16 – 16-channel binary input
Pepperl+Fuchs RSD-TI-Ex8 – 8-channel temperature converter
Pepperl+Fuchs RSD-UO-Ex8 – analog driver/repeater
Pepperl+Fuchs RSD-BO-Ex4 – 4-channel valve control module
Pepperl+Fuchs RSD-GW-Ex1.PA – PROFIBUS-PA gateway
Related Tags
Pepperl+Fuchs RSD-CI-Ex8
Pepperl+Fuchs 39067
RSD-CI-Ex8 39067
Pepperl+Fuchs IS-RPI
IS-RPI Analog Input
8-Channel Analog Input
Intrinsically Safe Analog Input
4–20 mA Input Module
2-Wire Transmitter Interface
Hazardous Area I/O
Ex I/O Module
Process Instrumentation
Pepperl+Fuchs Spare Parts
Industrial Automation Spare Parts
