Selected product option for Isolating signal converter with integrated transmitter supply. All information below applies to the selected product option.
Reliable signal separation is critical when field signals leave an intrinsically safe area. ST500Ex isolates and converts standard 0/4..20 mA or 0/2..10 V DC signals while providing a fully floating isolated transmitter supply for connected field devices.
The device supports active 2-wire and 3-wire sensors in Ex applications, with approx. 20 V DC transmitter supply and short-circuit current below 24 mA. Switch-selectable input and output ranges make adaptation straightforward, while simultaneous current and voltage outputs help integrate the signal into existing control systems.
Designed for control cabinet installation, the compact DIN rail case fits TS35 mounting and weighs approx. 200 g. ATEX approval for intrinsically safe circuits, case IP30 and IP20 terminals support reliable use in dry, clean and well monitored areas.
The device accepts 0/4..20 mA and 0/2..10 V DC input signals. Output ranges are also selectable for 0/4..20 mA and 0/2..10 V DC.
ST500Ex provides a fully floating isolated transmitter supply for connected active sensors. The supply is approx. 20 V DC with Ri approx. 300 Ω.
Current and voltage outputs are available for connection to downstream systems. The voltage output is short-circuit-proof and can operate in parallel with the current output.
Span and start value for 4 mA/2 V can be adjusted by approx. ± 20 %, supporting signal adaptation during setup.
The polycarbonate DIN rail case is designed for TS35 mounting and uses screw terminals for wires up to 2.5 mm².
| Analog input type (voltage) |
0…10 V, 2…10V
|
|---|---|
| Analog input type (current) |
0…20 mA, 4…20 mA
|
| Degree of protection front |
IP30
|
|---|---|
| Degree of protection terminals |
IP20
|
| Operating temperature |
-10...+55 °C
|
| Type of analog output |
0…20 mA, 4…20 mA,0…10 V, 2…10V
|
|---|---|
| Temperature coefficient |
0.01 %/K
|
| Accuracy |
0.3 %
|
| Burden (current output) |
< 1000 Ω
|
| Dimensions |
22.5 mm x 75 mm x 110 mm
|
|---|---|
| Materials |
Makrolon 8020, UL94V-1
|
| Mounting |
TS35 Rail mounting
|
| CE Conformity |
Yes
|
|---|---|
| ATEX marking |
II (1) G [Ex ia] IIC, II (1) D [Ex iaD]
|
| Electrical connection type |
Screw terminal box with pressure plate, max. 2.5mm² wire
|
|---|
| Auxiliary voltage |
85…253 V AC, 10..30 V AC/DC
For 10 ... 30 V AC/DC: 10…30 V AC/DC |
|---|---|
| Power consumption |
< 3.5 VA
|
| Protection class |
III
|
| Degree of pollution |
2
|
| Rated voltage |
253 V AC or 125 V DC
|
| Test voltage |
3 kV AC
|
| Internal Resistance (Ri) |
~ 300 Ω
|
|---|---|
| Current |
< 27 mA
|
| Transmitter Power Supply |
approx. 20 V DC
|
| Type of controls |
Poti, Dip-Switches
|
|---|
