Samson 4749, Mounting And Operating Instructions, Page: 83 / 92

EB 4749 EN 15-21
IECEx Certificate
of Conformity
Certificate No.:
IECEx KIWA 19.0022X
Date of issue: 2019-10-10
Page 3 of 4
Issue No: 0
EQUIPMENT:
Equipment and systems covered by this Certificate are as follows:
SPECIFIC CONDITIONS OF USE: YES as shown below:
The Position Transmitter Type 4749 is mounted on control valves and converts the lifting or rotating movements of the valve drive into a
4-20 mA current signal.
The position transmitter enclosure is provided with a threaded cover and can be of aluminium or stainless steel.
Type of protection T-class Ambient temperature range
Ex ia IIC
T6 -40 °C to +55 °C
T5 -40 °C to +70 °C
T4 -40 °C to +80 °C
Ex ia IIIC T85 °C -40 °C to +55 °C
Ex db IIC
T6 -55 °C to +65 °C
T5 -55 °C to +80 °C
T4 -55 °C to +85 °C
Ex tb IIIC T80 °C -55 °C to +65 °C
The Position Transmitter enclosure provides a degree of protection of IP66 in accordance with IEC 60529.
- For the applicable ambient temperature range, refer to the Equipment section above;
- For Type of protection Ex db: The flameproof joints are not intended to be repaired;
- For Type of protection Ex tb and Ex ia IIIC: The equipment shall be installed and maintained such that hazards caused by electrostatic
discharge are excluded;
- For Type of protection Ex db, Ex tb and Ex ia IIIC: Heat resisting cables and cable glands, suitable for a temperature of at least 20 K
higher than the max. ambient temperature shall be used.