HIMA HIMax®Relay Output Module X-DO 12 01

Product Description

The X-DO 12 01 relay module is intended for use in the programmable electronic system (PES)

HIMax.

The module can be inserted into any of the base plate slots with the exception of the slots

reserved for system bus modules. For more information, see System Manual (HI 801 001 E).

The module is equipped with 12 potential-free relay outputs with forcibly guided contacts. The

relay outputs are suitable for connecting ohmic and inductive loads.

The module has been certified by the TÜV for safety-related applications up to SIL 3

(IEC 61508. IEC 61511 and IEC 62061) as well as Cat. 4 and PL e (EN ISO 13849-1).

Refer to the HIMax Safety Manual (HI 801 003 E) for more information on the standards used to

test and certify the module and the HIMax system.

Safety Function

The module performs its safety function using two safety relays that are connected in series and

continuously monitored by the safety-related processor submodule.

The safety function is performed in accordance with SIL 3.

Reaction in the Event of a Fault

If the safety-related processor system of the module detects a module fault during operation, the

module adopts the safe state and all the outputs are de-energized in accordance with the 'de-

energize to trip principle'. If a channel fault occurs, only the affected channel is switched off.

The module activates the Error LED on the front plate.

Scope of Delivery

The module must be installed on a suitable connector board to be able to operate. If a Field

Termination Assembly (FTA) is used, a system cable is required to connect the connector board

to the FTA. Connector boards, system cables and FTAs are not included within the scope of

delivery.

The connector boards are described in Chapter 3.6. the system cables are described in

Chapter 3.7. The FTAs are described in own manuals.

Structure

The module is equipped with 12 relay outputs. Each relay output is switched by two contacts in

series. After every cycle, the module reads the status of the forcibly guided contacts and

compares it status with the output variables.

The relays in use have forcibly guided contacts (EN 50205) and can be used for safety

shutdowns. Forcibly guided contacts are connected with one another mechanically such that the

normally open and the normally closed contacts cannot be closed simultaneously.

All 12 relay outputs are electrically safely isolated from one another. Each relay output is safely

isolated from the voltage supply of the module by its own contact circuit. For safe insulation, the

air and creeping distances are designed in accordance with IEC 61131-2 for overvoltage class II

up to 300 V.

For burner management systems, the switching current must be limited to 60 % of the maximum

allowed value using an external fuse in accordance with EN 298 and EN 50256 (VDE 0116).