HIMA H51q-HS B5233-1 997105233 Complete central rack assembly kit
Product Description
The safety-related F31 02 controller is a compact system in a metal housing with 20 digital
inputs and 8 digital outputs.
The controller is available in various model variants for SILworX and ELOP II Factory, see
Table 4.
The device is suitable for mounting in Ex-zone 2. see Chapter 4.1.4.
The device is TÜV-certified for safety-related applications up to SIL 3 (IEC 61508. IEC 61511
and IEC 62061), Cat. 4 and PL e (EN ISO 13849-1) and SIL 4 (EN 50126. EN 50128 and
EN 50129).
Further safety standards, application standards and test standards are specified in the
certificates available on the HIMA website.
Safety Function
The controller is equipped with safety-related digital inputs and outputs.
Safety-Related Digital Inputs
The controller is equipped with 20 digital inputs. The state (HIGH, LOW) of each input is
signaled by an individual LED.
Mechanical contacts without own power supply or signal power source can be connected to the
inputs.
Potential-free mechanical contacts without own power supply are fed via an internal short
circuit-proof 24 V power source (LS+). Each of them supply a group of 4 mechanical contacts.
Figure 1 shows how the connection is performed.
With signal voltage sources, the corresponding ground must be connected to the input (L-), see
Figure 1.

Reaction in the Event of a Fault
If the device detects a fault on a digital input, the user program processes a low level in
accordance with the de-energized to trip principle.
The device activates the FAULT LED.
In addition to the channel signal value, the user program must also consider the corresponding
error code.
The error code allows the user to configure additional fault reactions in the user program.
Line Control
Line control is used to detect short-circuits or open-circuits and can be configured for the F31
system, e.g., on EMERGENCY STOP inputs complying with Cat. 4 and PL e in accordance with
EN ISO 13849-1.
To this end, connect the digital outputs DO 1 through DO 8 of the system to the digital inputs DI
of the same system as follows:
The HIMA H51q-HS B5233-1 (part number 997105233) refers to a complete Central Rack Assembly Kit for the HIQuad safety system.
Unlike the individual modules we discussed (the F8621A or F7131), the B5233-1 is the pre-wired subrack and base system that houses these modules to create a high-availability (HS) safety controller.
Core Components of the Assembly Kit
The B5233-1 kit typically includes the following hardware pre-installed in a 5 HU (Height Unit), 19-inch rack:
1 x K 1412B Central Rack: The physical chassis and backplane (Z 1001).
2 x F 8650 Central Modules (CU): These work in a redundant, clock-synchronized configuration to provide SIL 3 safety.
3 x F 7126 Power Supply Modules: These convert $24text{ V DC}$ to the $5text{ V DC}$ needed for the system's logic. They are wired in parallel for redundancy.
1 x F 7131 Power Supply Monitoring Module: (As discussed previously) This monitors the health of the $5text{ V}$ rail and manages the backup batteries.
2 x F 7546 Bus Termination Modules: Required for proper signal integrity on the communication bus.
3 x Z 6011/Z 6012/Z 6013 Modules: These are rear-mounted modules for fan monitoring, decoupling, and fusing of the watchdog (WD) signals.
Key Specifications
| Feature | Details |
| Safety Level | Up to SIL 3 (IEC 61508) |
| Redundancy | High Availability (HS) - Dual processors running in parallel |
| Bus Type | Single-channel I/O bus (B5233-1 specific) |
| Cooling | 3 integrated fan modules with speed monitoring |
| Dimensions | Standard 19" width, $220text{ mm}$ depth, $5text{ HU}$ height |
The Difference: B5233-1 vs. B5233-2
When working with these systems, it is vital to note the bus configuration:
B5233-1 (HS): Features a single-channel bus with redundant central modules.
B5233-2 (HRS): Features a redundant bus and redundant central modules for even higher fault tolerance.
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