System  Concept for HIQuad X 
HI 803 211 E Rev. 1.01.00  Page 13 of 110 
3  Concept for HIQuad X 
HIQuad X is an innovative, high-performance automation system that is based on the existing 
HIQuad system. SILworX, HIMA's tried and tested programming tool, is used for programming, 
configuring, monitoring, operating and documenting HIQuad X. All HIMA programmable 
systems are thus future-proof and operated with just one programming tool. Additionally, 
HIQuad X supports already existing HIQuad I/O modules. 
H51X and H41X, the HIQuad X system families, can be equipped with identical modules and 
have the following differences: 
1 (with a maximum of 12 I/O 
modules) 
Processor module (F-CPU 01) 
I/O processing module 
(F-IOP 01) 
1 in the base rack 
1 in the extension rack 
Communication module 
(F-COM 01) 
A maximum of 10 in the 
base rack 
A maximum of 2 in the base rack 
I/O modules in each extension 
rack 
Total number of I/O modules 
Table 1:  Differences of HIQuad H51X Compared to H41X 
The H51X and H41X system families can be equipped with digital and analog I/O modules. For 
details, refer to Chapter 4.9. 
The I/O processing module (F-IOP 01) uses the I/O bus to interconnect the I/O modules within 
one rack. The F-IOP 01 module safely communicates with the processor modules via one or 
two system buses, see Figure 2 and Figure 4. 
3.1  Safety and Availability 
The HIQuad X systems are designed for safety-related applications operating in accordance 
with the energize to trip and de-energize to trip principles up to SIL 3 in accordance with 
IEC 61508. Additionally, the HIQuad X system complies with the standards specified in the 
certificates. 
Refer to the HIQuad X safety manual (HI 803 209 E) and certificates for the standards used to 
test the HIQuad X system. 
For safety-related application up to SIL 3, the base racks must be equipped with the safety-
related processor modules (F-CPU 01). The safety-related processor module (F-CPU 01) 
features a 1oo2 processor system. The 1oo2 processor system includes two microprocessors 
that continuously align their data. 
Safety-related HIQuad I/O modules can be used to connect to the field level, see Chapter 4.9. 
I/O modules and processor modules exchange data via safety-related I/O processing modules 
(F-IOP 01) with integrated 1oo2 processor system. 
Additional non-safety-related I/O modules can be used for non-safety-related applications. 
Depending on the required safety and availability, the H51X and H41X system families can be 
structured as mono or redundancy systems, see the following chapters.