Samson 4749, Mounting And Operating Instructions, Page: 72 / 92

15-10 EB 4749 EN
13
SCHEDULE
14
EU – Type Examination Certificate KIWA 19ATEX0038 X Issue No. 1
Page 2 of 3
15.1 Description of Product
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 aluminum 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
EN 60529.
Type designation
4749-abcde
a: Approvals
180 (Intrinsically safe / Explosion proof ATEX)
b: Options
0 (position transmitter 4 - 20 mA)
c: Reserved
X (not safety relevant)
d: Field wiring entry
0 (M20x1,5)
1 (NPT 1/2”)
e: Enclosure material
0 (aluminium)
1 (stainless steel)
15.2 Electrical Data
Type of protection db or tb:
Power supply: 12-28 Vdc, 4-20 mA.
Type of protection ia:
Supply and output circuit (ter31, -32):
in type of protection intrinsic safety Ex ia IIC, only for connection to a certified intrinsically safe
circuit, with the following maximum values:
Ui = 28 V; Ii = 115 mA; Pi = 1,0 W; Ci = 19,2 nF; Li = 0 mH