Additional instructions for

IEC 61508 compliant devices

from HW Rev. 05.xx

Introduction

Safety Manual for TZIDC / TZIDC-200 digital

Positioner.

The TZIDC / TZIDC-200 is an intelligent digital

positioner for communication via HART within the

positioner product range.

Application area

The TZIDC is an electronically configurable 2-wire 4 to 20 mA valve positioner with HART® communication capabilities designed for

mounting on pneumatic linear or rotary actuators.

The TZIDC-200 is a variant designed with a flameproof enclosure as explosion protection concept.

The integrated I/P module with subsequent pneumatic amplifier is used to control the attached pneumatic actuator.

The SIL Safety Function is intended to open or close actuator/valves assemblies as emergency application.

By providing 0 mA as control/setpoint signal the positioner depressurizes the fail-safe actuator which return spring moves the valve

to a predefined, safe end position (either OPEN or CLOSED).