Dinel IRU–420 Isolating Repeater Level Controller

Dinel IRU–420 Isolating Repeater are designed for supply intrinsically safe level meters in explosive areas and for the conversion of input signal 0/4 ÷ 20 mA to an output signal. Galvanic separation of current signal from explosive area to non-explosive area. The housing of units are made by polycarbonate and ready for mounting on DIN rail 35 mm. Is manufactured in variants for 24 V DC or 230 V AC.

Dinel IRU–420 Isolating Repeater Features

Universal intrinsically safe isolating repeater of current signals 0/4 ÷ 20 mA with option voltage output 0 ÷ 10V
For supply sensors with output 0/4 ÷ 20 mA in the explosive area
Galvanic separation input and output signals
Option bidirectional transmission of communication signal HART®
Installation on DIN rail 35 mm
Variants for 24 V DC or 230 V AC

Electrical Connector

The electrical connection is performed in a voltage-free state. The supply voltage (terminals 13 and 14) can be connected to mains power only via a fuse or a circuit breaker (max. 16 A)! On to terminals 5, 6 and 7 (blue terminal block, side IN) only an approved sensor with a current output of 0/4 … 20 mA may be connected, conforming to the conditions of the given hazardous area. If the sensor is connected to terminals 5 and 6, then it is also powered from these terminals.

If, however, the sensor is connected to terminals 6 and 7, an external power source must be used to power it. The output from the device is a current signal 0/4 … 20 mA or a voltage signal 0 … 10 V with working contacts 9, 10, 11 (grey terminal block, side OUT). Terminals no. 4, 8, and 12, 16 (on version IRU-420-H) are used for the connection of an external communicator HART (HHC – Hand-Held-Communicator).

Dinel IRU–420 Isolating Repeater Specifications

	IRU-420-I	IRU-420-H	IRU-420-U
Input value	0/4 … 20 mA	0/4 … 20 mA	0/4 … 20 mA
Output value	0/4 … 20 mA	0/4 … 20 mA	0 … 10 V (loading max. 20 mA)
Bidirectional transmission communication signal HART	NO	YES	NO
Nominal supply voltage
variant 230 V	60 … 230 V AC (+10 %) 50 ÷ 60 Hz, 85… 230 V DC (+10 %)
variant 24 V	18 … 30 V AC (+10 %) 50 ÷ 60 Hz; 18 … 40 V DC (+10 %)
Nominal power demand (AC / DC)	7 VA / 4 W
Maximum effective value of AC or DC voltage that can be connected to the terminals follow-up devices that are not intrinsically safe, without breaking the type of protection	Um = 253 V
Voltage on active input (terminals 5 a 6)	typ. 24,1 V DC (0 mA) / min. 18 V DC (20 mA)
Output auxiliary voltage (terminals 9 a 11)	24 V DC (max. 25 mA)
Linearity	? 0,05 % (4 … 20 mA) / ? 0,07 % (0 … 20 mA)		? 0,05 %
Temperature error	? 0,05 % / K
Allowed short circuit time (input and output)	unlimited (short on output is indicated by off LED)
Ambient temperature	-20 °C … +60 °C
Protection class	IP 20
Housing material	Polycarbonate
Material of terminals	CuBe
Max. conductor size	1 x 2,5 mm2
Isolating voltage (main terminals / input + output)	3500 V
Isolating voltage (input / output)	3500 V
Weight	cca 0,2 kg