HIMA H41q and H51q series programmable electronic systems (PES)

Diagnosis: Equipped with a 4-digit alphanumeric display screen and 2 LED indicator lights, used to display system status, I/O level information, and user program information.

3.2 Non safety central module F8651/F8653

Used for standard or high availability (non secure) applications.

Single processor: using Intel 386 EX processor with a clock frequency of 25 MHz.

Functional unit: including microprocessor, program and data storage, I/O bus logic, dual port RAM (for communication with redundant central modules), multiplexer, etc.

Interface and diagnosis: Two RS-485 interfaces and a diagnostic display screen are also provided.

Input/output subsystem

The I/O module is the bridge between PES and the process site, responsible for signal conversion and matching.

4.1 I/O module characteristics

Online plugging and unplugging: All I/O modules support live plugging and unplugging while the system is running.

Signal indication: The status of the digital output module is clearly displayed through the LED on the cable plug.

Power supply method: It can be powered through the front-end cable plug or through the I/O bus board.

4.2 Safe output module

All safety related output modules meet the AK 6 level requirements, and their key designs include:

Triple redundant shutdown: Three series connected semiconductor switches are used internally, far exceeding the requirement of two independent components for safe shutdown, achieving "integrated safe shutdown". Once the module fails, it will automatically switch to a safe power-off state.

Parallel capability: To improve availability, the output terminals of the safety type output module can be used in parallel without the need for external diodes.

L-Power supply design: When the negative terminal L of the power supply is cut off, there will be no voltage at the output terminal, so there is no need to wire L - as a circular feeder.

Inductive load handling: It can be directly connected to inductive loads without the need for parallel diodes at both ends of the coil.

4.3 Intrinsic Safety (Ex) i Module

For hazardous area applications, HIMA offers two types of intrinsic safety modules: those with PCB coating and those without coating. When using a coated Ex i module, the adjacent slot on the right must be kept empty or a blind plate with an isolation plate must be installed to ensure safe isolation.

Power Supply and Distribution

5.1 System Voltage

The HIMA system uses two voltage levels:

24 V DC: peripheral device power supply, positive pole L+, negative pole L - (reference pole).

5 V DC: Power supply for microprocessor system, generated by 24 V DC through high-frequency switch power module (F7126 for H51q, F7130A for H41q).

5.2 Power Redundancy and Monitoring

Redundant configuration: Multiple parallel power modules are equipped in H41q-H/HR/HS/HRS and H51q systems. When one module fails, other modules can seamlessly take over to ensure the continuous operation of the system.

Voltage monitoring: The 5V DC output voltage is monitored for undervoltage and faults by the monitoring module (F7131) or the central module itself. Fault information is transmitted to the user program through system variables.

Battery buffering: The sRAM and hardware clock on the central module are buffered by onboard lithium batteries. The sRAM of the coprocessor module (F8621A) in the H51q system is buffered by the lithium battery on the monitoring module F7131.

5.3 24V DC distribution

Distribute 24V DC power through plug-in fuses and distribution units (such as F7133 power distribution module). Each I/O module corresponds to a fuse on the F7133 module, which can also provide fuse protection for sensors and actuators. The power distribution module is equipped with LED indicator lights and contacts for fuse fault alarm.

Communication Interface and Expansion

HIMA PES provides multiple communication interfaces to meet different levels of system integration requirements.

RS-485 interface: Each central module comes standard with 2 electrically isolated RS-485 interfaces for connecting programmers or building control system buses (HIBUS). In the H51q system, up to 6 additional RS-485 interfaces can be extended through up to 3 coprocessor modules (F8621A).

Ethernet interface: Ethernet communication can be achieved through the communication module F8625, which complies with the IEEE 802.3 10BaseT standard and can expand up to 10 interfaces.

Profibus DP interface: Through the communication module F8626, Profibus DP slave communication can be achieved, with a maximum transmission rate of 12 Mbit/s and the ability to expand up to 10 interfaces.

Installation and maintenance specifications

7.1 ESD Protection

The manual begins with the phrase 'Attention' emphasizing the importance of electrostatic discharge protection. When performing maintenance on power, signal, and data lines, qualified personnel must operate and take all necessary ESD protection measures. Maintenance personnel must release their own static electricity before directly contacting these lines.

7.2 Module insertion and removal

I/O module: can be plugged and unplugged with power. When pulling out, first loosen the fixing screw and pull out the cable plug together. When inserting, first insert and secure the module, then insert the cable plug.