Product Description
The X-CI 24 01 counter module is intended for use in the programmable electronic system
(PES) HIMax.
The counter module can be inserted in any of the base plate slots with the exception of the
slots reserved for system bus modules. For more information, refer to the System Manual
(HI 801 001 E).

The counter module is used to count the pulses, to measure the frequency and the
rotational speed and, if defined, to recognize the rotation direction. Two channels are
required to use the recognition of rotation direction function, see Chapter 4.6.4.
Proximity switches in accordance with EN 60947-5-6 (NAMUR) or control circuit devices of
type 3 in accordance with EN 61131-2 can be connected to the counter module. Proximity
switches and control circuit devices may not be operated simultaneously.
The module has been certified by the TÜV for safety-related applications up to SIL 3
(IEC 61508. IEC 61511 and IEC 62061), Cat. 4 (EN 954-1) 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 modules and the HIMax system.
Safety Function
The counter module samples the switching operations of the connected sensors with
safety-related accuracy (1 % if the frequency is measured, ± 1 pulse if the pulse is
measured) .
The safety function is performed in accordance with SIL 3.
Reaction in the Event of a Fault
If a fault occurs, the counter module enters the safe state. The rotation speed is set to 0.
The user program retains its last valid process value for the counter readings.
The module activates the Error LED on the front plate.
Scope of Delivery
The counter module must be installed on a suitable connector board to be able to operate.
If a FTA is used, a system cable is required to connect the connector board to the FTA.
Connector boards, sensor selection plug, system cables and FTAs are not included within
the module's scope of delivery.
The various connector boards are described in Chapter 3.6. the system cables in Chapter
3.7. The FTAs are described in separated manuals.
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