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MAD-STC2

HART and Modbus Smart Transmitter Intrinsic Safety Barrier(2-Channel)
The MAD-STC2 is a 2-Channel intrinsically safe barrier, designed for reading 2-wire smart transmitters in hazardous areas. One of the main features of the MAD-STC is that it can be used as a HART to MODBUS converter. The MAD-STC provides a HART compatible source loop of power to the hazardous area, and it then repeats the measured current in a safe area. In fact, the analog input signals transferred to the safe area are as an isolated current value, in the range of 4 ~ 20 mA. It then carries the hart signal for the smart transmitter bi-directionally. In addition to HART transmitting technology, the MODBUS RTU is also another option to transfer and configure data, with a bit rate of up to 115.2 kbps via the RS-485 serial port. This makes it ideal for convenient, remote monitoring in a safe area. In this case, the user can choose data transfers via the Modbus, or reproduce loop power in the safe area The current and power consumption of the input is about 208 mA and 5W, respectively. And the power dissipation is less than 1W. Moreover, the MAD-STC2 contains a 24 VDC nominal, with reversed polarity protected power, mounted on a 35 mm DIN mounting rail acc
Product Features
  • Support 2 Channels
  • 24 VDC Supply
  • Analog Signal Type
  • Modbus RTU
  • RS-485 Interface
  • Connection with Screw Terminals
  • 2 Wire Smart Transmitters
  • Configurable with Modbus Protocol
  • MAD-STC2
  • MAD-STC 2-2-min.png
  • MAD-STC 2-3-min.png
GENERAL SPECIFICATION
Signal TypeAnalog Input
Number of Channels2 Channel
SUPPLY
Rated Voltage24 VDC Nom (20-30 VDC) Reverse Polarity Protected
ConnectionTerminal 1 PIN 1(+24 VDC), Terminal 1 PIN 2 (GND)
Power Dissipation< 1 W
Current ConsumptionApprox. 208mA
Max. Power Consumption5 W
INPUT
Input4...20 mA
ConnectionTerminals 3,4
Connection SideField Side
Available Voltage400 ms> 16 V at 20 mA
OUTPUT
Output4...20 mA
ConnectionTerminals 2
Connection SideControl Side
Load0...550 Ω at 20 mA
Ripplemax. 50 μA rms
GALVANIC ISOLATION
Input / Power Supply

1500 VDC

Example. safe electrical isolation by reinforced insulation according to IEC/EN 61010^-1

Rated insulation voltage 300 Veff test voltage 3 kV, 50 Hz, 1 min.

Output/ Power SupplyFunctional Insulation, Rated Insulation Voltage 50 V AC
Output/ OutputFunctional Insulation, Rated Insulation Voltage 50 V AC
TRANSFER CHARACTERISTICS
DeviationAt –20 to +60 °C, 4...20 mA : ≤10 μA incl.
Influence of Ambient Temperature0.25 μA/K
DATA CONNECTION
Modbus RTURS-485 connection up to 115.2 kbps for Monitor/ Configuration
ConnectionTerminal1 PIN 3 (D-), Terminal1 PIN 4 (D+)
MOUNTING
MountingOn 35 mm DIN Mounting Rail Acc. to EN 60715:2001
ENVIRONMENTAL CONDITIONS
Operation TemperatureTemperature Limits –20 to +60 °C
Storage TemperatureTemperature Limits –25 to +65 °C
APPROVALS
IEC60079-0, IEC60079-11, IEC60079-15
FM & FM-C No.3024643,3029921C,conforms to Class 3600,3610,3611,3810
LOCATION
Safe Area/Non-Hazardous Locations or Zone 2, Group IIC T4, Class I, Division 2, Groups A, B, C, D
Temperature Code T4 and Class I, Zone 2, Group IIC, IIB, IIA T4 installation
SAFETY DESCRIPTION
ATEX

II 1 G Ex ic [ia Ga] IIC T4 Gc, II 3 G Ex ic [ic] IIC T4 Gc, II 1 D Ex ic [ia IIIC Da] IIC Gc

II 3 D Ex ic [ic IIIC Dc] IIC Gc

IECExEx ic [ia Ga] IIC T4 Gc, Ex ic [ic] IIC T4 Gc, Ex ic [ia IIIC Da] IIC Gc, Ex ic [ic IIIC Dc] IIC Gc
North American ZonesClass 1, Zone 2 AEx ic [ia Ga] IIC T4 Gc, Class I, Zone 2 AEx [ic] IIC T4 Gc
Zone 20 Ex ic [ia IIIC Da] IIC Gc, Zone 2 Ex ic [ic IIIC Dc] IIC Gc
North American DivClass I, Division 2, Groups A, B, C, D T4, Class II, Division 2, Groups F, G
ASSOCIATED ELECTRICAL APPARATUS
Vo/Voc17.0 V, Io/Isc = 85 mA, Po/Po = 1.45 W
IECEx24V, Ci = 6 nF, Li = 0 nH. Um = 30 V, -20 °C ≤ Ta ≤ 60°C.
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