MD-U1

Universal Intrinsic Safety Barrier (1-Channel)

The MD-U is a universal intrinsically safe barrier that can measure analog signals and be configured with the Modbus protocol, which is done with an integrated CPU platform. It is available in 1-2 or 3 channels, with a 35 mm DIN mounting rail acc. The SAG MD-U1 is a multi-function barrier that can measure temperature, voltage, and current. It supports a variety of temperature sensors, including 2-3-4- wire RTDs from PT10 to PT1000. It can also read different types of Thermocouple sensors (B, E, J, K, L, N, R, S, T-type). In addition to temperature, it can measure a wide span of voltage from -10 to 10 volts. And one of its channels can read current in the range of 0-20 mA and 4-20 mA. Furthermore, the data collected from electrical devices in hazardous areas is transmitted to the safe area via the MODBUS Protocol, with a bit rate up of to 115.2 kbps for Monitor/ Configuration. This allows for remote monitoring at a safe distance.

Product Features

Support 1 Channels
24 VDC Supply
Analog Signal Type
Modbus RTU
RS-485 Interface
Connection with Screw Terminals
Thermocouple
RTD
Voltage Input
Current

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 9 (), Terminal 10 ()
Power Dissipation	< 1 W
Current Consumption	Approx. 208mA
Max. Power Consumption	5 W
INPUT
Input	Thermocouple, 2-3-4 Wire RTD, Voltage, Current
Connection	Terminals 2
Rated Values	-
Integration Time	400 ms
Input Range	±500 mV (TC/mV), 0-4 kΩ (RTD/res), (sink, -10 to 10 volts), (sink 0-20mA)
RTD
RTD	(PT10,PT50,PT100,PT500,PT1000)
Type of Measuring	2,3 and 4 Wire
Measurement Loop Monitoring	Sensor Breakage
Measuring RTD Current	323 μA
THERMOCOUPLE
Thermocouple	B, E, J, K, L, N, R, S, T – Type (IEC 584-1: 1995)
Cold Junction Compensation	Internal
Measurement Loop Monitoring	-
VOLTAGE
Range	0 ... 10 V, 2 ... 10 V, 0 ... 1 V, -100 ... 100 mV, -10 … 10V
Resolution	-
CURRENT
Range	0 … 20mA, 4 … 20 mA
Resolution	-
DEVIATION
RTD	Max 0.1% of Span
Thermocouple	Deviation of CJC: ±0.8 K
Voltage	0.1 % of Span
Current	0.02%
DATA CONNECTION
Modbus RTU	RS-485 connection up to 115.2 kbps for Monitor/ Configuration
Connection	Terminal 3 (), Terminal 4 ()
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.
ENVIRONMENTAL CONDITIONS
Operation Temperature	Temperature Limits –20 to +60 °C
Storage Temperature	Temperature Limits –25 to +65 °C
MOUNTING
Mounting	On 35 mm DIN Mounting Rail Acc. to EN 60715:2001
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.