Emerson PACSystems™ RX3i System Manual

Emerson PACSystems ™  RX3i System Manual

Core characteristics of the system

Key Explanation of Characteristic Categories

Hardware compatibility supports three types of modules: IC695 (RX3i specific), IC694 (RX3i serial), and IC693 (Series 90-30 compatible)

Deployment flexibility: Local universal backplane+expansion/remote backplane combination, supporting up to 7 expansion/remote backboards

Power supply reliability supports load sharing and power redundancy design, with some power modules supporting hot swapping (requiring redundant configuration)

Module scalability covers discrete, analog HART、 All types of I/O modules including high-speed counting, motion control, communication gateway, etc

Environmental adaptability: Operating temperature range of 0-60 ℃, storage temperature range of -40~85 ℃, humidity range of 5-95% (without condensation), shock resistance of 10g, vibration resistance of 5-150Hz

Core hardware composition and specifications

（1） Backboard component

Backboard type, model series, slot number, core characteristics, suitable for power supply

Universal backplane IC695CHS007/012/016 7/12/16 supports PCI+serial dual bus, some support expansion slots (12/16 slot models) IC695 series power supply

The serial expansion backplane IC694CHS392/398 10/5 only supports serial bus and requires installation of the expansion power supply IC694 series power supply on the left side

Compatible with backplane IC693CHS392/398/393/399 5/10 Series 90-30 expansion/remote backplane, RX3i system compatible with IC693 series power supply

（2） Power module (core specifications)

Module Type Model Example Input Voltage Output Power Core Output Applicable Backboard

Universal Backplane Power Supply (AC Input) IC695PSA040 120/240Vac/125VDC 40W 3.3V/5.1V/24V Relay Power Supply Universal Backplane

Universal Backplane Power Supply (DC Input) IC695PSD180 18~30Vdc 80W 3.3V (60W)/5.1V (60W)/24V (75W) Universal Backplane

Expansion Backpanel Power Supply (High Capacity) IC694PWR330 85~264Vac/100~300VDC 30W 5V (30W)/24V Relay (15W)/24V Isolation (20W) Serial Expansion Backpanel

Expansion Backpanel Power Supply (DC Input) IC694PWR331 12~30Vdc (Start ≥ 18V) 30W 5V (30W)/24V Relay (15W)/24V Isolation (20W) Serial Expansion Backpanel

（3） Classification of Core I/O Modules

Discrete input module (some key models) | Model | Signal type | Number of channels | Core parameters | Isolation level 

|System 1500V DC optical isolation|

Discrete output module (some key models) | Model | Signal type | Number of channels | Output current | Protection function | 

Simulation and HART module

Analog input: Supports 4-20mA, voltage RTD、 Thermocouple signal, channel number 4-16, accuracy 0.1-0.25% span, some with advanced diagnostic function;

Analog output: Supports 4-20mA/Voltage signals, with 2 to 8 channels and an accuracy of 0.25 to 0.4% span;

HART module: IC695ALG626/628 (input), IC695ALG728 (output), supports analog signal+digital communication overlay, compatible with HART smart transmitter.

Special function module

High speed counting module: IC694APU300/305, IC695HSC304/308, supporting a counting frequency of 1.5MHz;

Motion control module: IC694DSM314/324, IC695PMM335 (multi axis);

Communication module: Supports protocols such as PROFINET (IC695PNC/PNS series), PROFIBUS (IC695PBM/PBS series), DeviceNet (IC694DNM200), etc.

System installation and deployment specifications

（1） Installation foundation requirements

Physical installation:

The backboard needs to be installed horizontally, with a reserved ventilation space of 10cm (4in);

The installation environment should be kept away from high temperature sources (transformers, power resistors) and strong electromagnetic interference sources (relays, motors);

The protection level of the cabinet shall not be lower than IP20, and the pollution level shall be G3.

Grounding specifications:

The backplane needs to be connected to the cabinet grounding bar through AWG # 12 or above grounding wire, with low impedance grounding resistance;

Single point grounding of the shielding layer of analog signal cables (source or module end);

All backboards share the same system grounding reference point.

（2） Power supply and expansion deployment

Power supply connection:

Universal Backplane Power Supply: The IC695 series power supply supports 120/240VAC or 24Vdc input, and attention should be paid to polarity anti reverse connection;

Expansion backplane power supply: The IC694 series power supply needs to be installed in the leftmost slot of the expansion backplane;

Redundant power supply: Multiple IC695PSA140/PSD140/PSD180 can be configured with load sharing or power redundancy, requiring a unified power source polarity.

Extended deployment:

Expansion condition: The 12/16 slot universal backplane requires the installation of a serial bus transmission module (IC695LRE001);

Expansion cable: Supports IC693CBL series prefabricated cables, with a maximum distance of 15m for expansion backboards and a maximum distance of 213m for remote backboards;

Termination requirement: The last extension/remote backplane must be equipped with a terminal resistor (IC693ACC307).

（3） Module installation and hot plug

Operation type key rule support module

Hot plugging requires operation while the system is powered on, and most IC695/IC694 series I/O modules (such as IC695ALG series, IC694MDL series) need to be fully inserted/removed within 2 seconds

Hot plugging is prohibited and must be performed with power off, otherwise the device's CPU module, power module (non redundant), and LRE001 expansion module will be damaged

Installation sequence: First install the backplane → power module → CPU module → I/O module, all modules

Key points of configuration and maintenance

（1） Module configuration rules

Slot restriction:

Universal backplane slot 0 only supports IC695 power module;

CPU modules (except CPE302/305) occupy 2 slots and cannot be installed in expansion slots;

The expansion module (LRE001) can only be installed in the rightmost slot of the 12/16 slot universal backplane.

Load calculation:

The power load needs to accumulate the 3.3V/5V/24V current requirements of all modules, not exceeding the rated output of the power supply;

Example: 12 slot backplane+CPU310+8 I/O modules, total load required ≤ 40W output of IC695PSA040.

（2） Maintenance and troubleshooting

Replacement of vulnerable parts:

Fuse: The power module has built-in 2A/5A fuses (model 44A724627 series), which need to be replaced with the same specifications;

Terminal block: pluggable terminal block (20/36 pins), the on-site power supply must be disconnected before replacement.

Common troubleshooting:

Power failure: Check the power LED (POWER/P/S FAULT/OVERTEMP/OVERLOAD) and verify the input voltage and load;

Communication failure: When there is no response from the expansion backplane, check the LED status of the LRE001 module, the connection of the expansion cable, and the terminal resistance;

Module malfunction: Check the specific module malfunction code through the CPU malfunction table and verify the module wiring and slot configuration.

Preventive maintenance:

Regular cleaning: Clean the backplate cooling channel and module dust every month;

Insulation testing: Measure the insulation resistance of the module with a 500VDC insulation meter every year, and it is qualified if it is ≥ 1M Ω;

Environmental monitoring: Ensure that the temperature inside the cabinet is ≤ 60 ℃ to avoid condensation.