ST500Ex-10-5, Intrinsically Safe Universal Isolating Signal Converter, 24VAC/DC
Properties:The ST500Ex isolating signal converters can be used to isolate and convert field signals 0/4...20mA or 0/2...10VDC out of the intrinsically area.
Isolating signal converter for application in zone 0 or zone 20 (constant explosion risk) with integrated transmitter supply. It allows the direct connection of active 2-wire sensors (4 ... 20 mA) and 3-wire sensors in the Ex-area.
The ST500Ex provides a fully floating isolated transmitter supply.
- Input intrinsically safe ATEX II (1) G [Ex ia] IIC, II (1) D [Ex iaD]
- 2 power-supply-designs with wide range of allowed supply voltage:
- 10 ... 30 V DC / AC oder 85 ... 253 V AC
- Electrically isolated: between input / output / supply voltage
- 22.5 mm standard case for rail mounting TS35
- Universal inputs/outputs for (0)4 ... 20 mA and 0(2) ... 10 V
Measuring ranges: selectable
Current input:
0 ... 20 mA or 4 ... 20 mA
(Ri = 25 Ohm, max. 100 mA overload)
Voltage input:
0 ... 10 V or 2 ... 10 V
(Ri = ... 40 kOhm, max. 100 V overload)
Span: approx. ±20 %, adjustable
Transmitter supply: approx. 20 V DC, Ri = approx. 300 Ohm
Output signal:
0 - 20 mA, 4 - 20 mA, 0 - 10 V or 2 - 10 V
(selectable via DIP switch)
max. load: burden < =1 kOhm (at mA), load: max. 15 mA (at V)
Basic accuracy: < =0.3 % of measuring range
Temperature coefficient: < =0.01 %/K
Repeat accuracy: < =0.1 % of measuring range
Rise time: T90 = < 100 ms
Power supply:
... - 5 - 00 10 ... 30 V DC / AC
Power consumption: max. 3.5 VA
Isolation voltage:
500 V AC, according to VDE 0110 Gr. 2
between input/output/supply voltage
Test voltage: 4 kV DC between input/output/supply voltage
Working temperature: -10 .. 55 °C
Electrical connection: screw-terminals with pressure plates, max. 2.5 mm²
Dimensions: 22.5 x 75 x 110 mm (W x D x H)
Protection: IP 30 (case), IP 20 (terminals)
Ex-certifi cation: TÜV 97 ATEX 1150, II (1) G [Ex ia] IIC, II (1) D [Ex iaD]
Connection data: U0 = 25.2 V, I0 = 95 mA, P0 = 600 mW,
C0 / L0 (ia/IIC) = 47 nF / 2 mH or 107 nF / 0.2 mH,
C0 / L0 (ia/IIB) = 370 nF / 15 mH or 430 nF / 1 mH,
Ci, Li = negligible
The intrinsically safe circuit is electrically
isolated from the non-intrinsically safe circuits
up to a sum of the peak values of the nominal
voltage of 375V.
