Digital limit switch with VarioControl interface

SKU: AD-MK 350 GVD

Category: Limit Switch

bipolar current input (+/- 0.5 mA to +/- 50 mA)
bipolar voltage input (+/- 1 V to +/- 100 V)
power supply of 2- / 3-wire transmitters
two potential-free change-over contacts
operating module as an accessory
23mm narrow housing with detachable terminal clamp

175,41 €

incl. 19% VAT , plus

Accessories:

1x Indicating / Operating Module no + 69,38 €

The limit switch AD-MK 350 GVD serves the switching of limiting values on analogue signals, transmitter signals and resistance thermometer. If a 2-wire transmitter is connected, it will be supplied directly through a galvanic separated and current limited supply voltage. The device has analogue inputs for current, voltage and resistance thermometer, which can be utilised alternatively. The AD-MK 350 GVD can switch maximally two independent limiting values with its two potential-free change-over contacts. The switching thresholds and operating modes can be freely parameterized. This can be carried out via the optional control panel AD-VarioControl or via the programming software AD-Studio. The status of the relevant relay is indicated via LED at the front or at the operating module AD-VarioControl.

Application

Switching limit values to active analog signals, 2- / 3-wire transmitters, and resistance thermometers, e.g. Flows, heights or temperatures.

Input current
Measuring range	-50 ... + 50 mA DC
Input resistance	40 Ohm
Resolution	16 Bit
Accuracy	0,1 % of full scale
Input voltage
Measuring range	-100 ... + 100 V DC
Input resistance	1 MOhm
Resolution	16 Bit
Accuracy	0,1 % of full scale
Transmitter supply
Off-load voltage	24,5 V
Voltage at 20mA	17,5 V
Current limit	~ 25 mA
Resistance thermometer inputs Pt100, Pt500, Pt1000 to DIN EN 60751
Measuring range	-200 ... +850 °C
Connection method	2-, 3- oder 4-wire system
Resolution	16 Bit
Accuracy	0,6 K
Smallest measuring spans	20 K
Max line resistance¹⁾	10 Ohm/cable
Sensor supply	310 µA
¹⁾With 2-conductor the line resistance comes as an offset into the measurement.
Resistance thermometer inputs Ni100, Ni500, Ni1000 to DIN EN 43760
Measuring range	-60 ... +230 °C
Connection method	2-, 3- oder 4-wire system
Resolution	16 Bit
Accuracy	0,6 K
Smallest measuring spans	20 K
Max line resistance¹⁾	10 Ohm/cable
Sensor supply	310 µA
¹⁾With 2-conductor the line resistance comes as an offset into the measurement.
Relay outputs A/B
Contact type	Potential free changeover
Max. AC-breaking capacity	250 V AC, 2 A AC, 50Hz
Max. DC-breaking capacity	50 V DC, 2 A DC
Switching operations
Mechanical	10⁷
AC: 230V / 2A, cos(phi)=1	6 * 10⁵
AC: 230V / 2A, cos(phi)=0,4	2 * 10⁵
DC: 24V / 1A	2 * 10⁵
Transmission behaviour
Rise time	500 ms (output auf 90 %)
Temperature influence	+/- 100 ppm/K of full scale
Supply
Voltage range AC	50 ... 253 V AC, 50/60 Hz
Nominal voltage AC	230 V AC
Voltage range DC	20 ... 253 V DC
Nominal voltage DC	24 V DC
Power consumption AC / DC	4 VA / 2,4 W
Housing
Dimensions (WxHxD)	23x110x134 mm
With operating module (bxhxt)	23x110x138 mm
Type of protection	IP 20
Connection method	Detachable terminal clamp
Terminals, wire cross section	2,5 mm² flex wire / 4 mm² one wire
Bolting torque terminals	0,5 Nm
Weight	~ 150 g
Manner of fastening	35 mm DIN rail 35mm
Environmental conditions
Ambient temperature	-10 ... 50 °C
Storage and transport	-10 ... 70 °C (no condensation)
EMC
Product family standard¹⁾	EN 61326-1
Emitted interference	EN 55011, CISPR11 Cl. B, Gr. 1
¹⁾During electromagnetic disturbance minor changes in output signal are possible.
Electrical safety requirements
Product family standard	EN 61010-1
Overvoltage category	II
Pollution degree	2
Galvanic isolation, test voltages
Input/output	2,5 kV (1 min)
Signal/auxiliary voltage	3 kV (1 min)