MAD-STC1

HART and Modbus Smart Transmitter Intrinsic Safety Barrier(1-Channel)

The MAD-STC1 is a 1-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 1 Channels
24 VDC Supply
Analog Signal Type
Modbus RTU
RS-485 Interface
Connection with Screw Terminals
2 Wire Smart Transmitters
Configurable with Modbus Protocol

Technical Specifications

GENERAL SPECIFICATION
Signal Type	Analog Input
Number of Channels	1 Channel
SUPPLY
Rated Voltage	24 VDC Nom (20-30 VDC) Reverse Polarity Protected
Connection	Terminal 1 PIN 1(+24 VDC), Terminal 1 PIN 2 (GND)
Power Dissipation	< 1 W
Current Consumption	Approx. 208mA
Max. Power Consumption	5 W
INPUT
Input	4...20 mA
Connection	Terminals 3
Connection Side	Field Side
Available Voltage	400 ms> 16 V at 20 mA
OUTPUT
Output	4...20 mA
Connection	Terminals 2
Connection Side	Control Side
Load	0...550 Ω at 20 mA
Ripple	max. 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 Supply	Functional Insulation, Rated Insulation Voltage 50 V AC
Output/ Output	Functional Insulation, Rated Insulation Voltage 50 V AC
TRANSFER CHARACTERISTICS
Deviation	At –20 to +60 °C, 4...20 mA : ≤10 μA incl.
Influence of Ambient Temperature	0.25 μA/K
DATA CONNECTION
Modbus RTU	RS-485 connection up to 115.2 kbps for Monitor/ Configuration
Connection	Terminal1 PIN 3 (D-), Terminal1 PIN 4 (D+)
MOUNTING
Mounting	On 35 mm DIN Mounting Rail Acc. to EN 60715:2001
ENVIRONMENTAL CONDITIONS
Operation Temperature	Temperature Limits –20 to +60 °C
Storage Temperature	Temperature 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
IECEx	Ex 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 Zones	Class 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 Div	Class I, Division 2, Groups A, B, C, D T4, Class II, Division 2, Groups F, G
ASSOCIATED ELECTRICAL APPARATUS
Vo/Voc	17.0 V, Io/Isc = 85 mA, Po/Po = 1.45 W
IECEx	24V, Ci = 6 nF, Li = 0 nH. Um = 30 V, -20 °C ≤ Ta ≤ 60°C.

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