Function

The devices from the SensorLine RM-XT range are differential pressure transmitters with additional multifunctional signal inputs for external sensors and a signal processor system. The transmitters are suited for harsh industrial environments and are used to measure non-corrosive gaseous media in above atmospheric or negative pressure ranges and connection to external sensors.

The differential pressure sensors integrated in the device convert the measured variable pressure/differential pressure to an electrical measuring signal. Within the calibrated measuring range, the electrical output signal is proportional to the present pressure/differential pressure. Thanks to the use of piezoresistive measuring cells and highly precise compensation and evaluation electronics the transmitters are calibrated for a broad temperature and pressure range with very narrow error margins.

For a temperature measurement, an external signal input is adjusted via a PT100 without measuring head. A second signal input is provided for the connection of an external pressure/differential pressure or temperature sensor.

Three signal outputs with analog proportional signals or square-root signal are available for signal transmission. All internal and external measuring signals can be transmitted via an RS-485 interface at a rate of 9600 bauds. The interface is suited for programmed logic controllers, process control systems and for the RECOMATIC control systems with R-IMC bus protocol. Two selector switches can be used to adjust the signal outputs, set the sensor measuring limits, bus address and device configuration.

Types

For a flexible application, devices with one or two differential pressure sensors for different measuring ranges are available. All device versions are also available for Ex areas acc. to ATEX zone 22, cat. 3D. The explosion proof versions are approved by DEKRA-EXAM.

Combined with the RM-OP32 control panel, the multifunctional RM-XT transmitters can be extended as controller system for on-off, three-step or continuous control processes.

Technical specifications

System / Measuring system	R-IMC bus system / laser-trimmed, piezoresistive measuring bridge
Tests	NormLine-S box from polycarbonate in RAL 7035, IP66 / NEMA 4 / IK08
	BlueLine-S box from polycarbonate in RAL 5015, IP66 / NEMA 4 / IK08, ATEX Zone 22, BVS 03 E 141
Norms / Conformity	EN 50178, VDE 0160, 2004/108/EC, IEC 770

No.	Function	Description
	Supply voltage	18 V ... 30 V DC and 24 V AC ±10%, 50-60 Hz and 230 V AC ±10%, 50-60 Hz and 110 V AC ±10%, 50-60 Hz
	0-10 V signal output Measuring cell 1	Differential pressure signal proportional or square-root depending on the device function (see section 10)
	4-20 mA signal output Measuring cell 1	Differential pressure signal proportional or square-root depending on the device function (see section 10)
	+24 V DC	Connection for passive pressure sensor / differential pressure sensor / temperature sensor
	4-20 mA signal input	Connection for passive pressure sensor / differential pressure sensor / temperature sensor
	PE connection	Protective earth
	4-20 mA signal output Measuring cell 2	Differential pressure signal or signal from a PT100 temperature sensor depending on the device function
	Pt100 signal input	Connection of an external Pt100 temperature sensor without measuring transducer
	Bus connection RS485	Interface for a PLC communication processor or the RECO R-IMC bus, transmission rate 9600 Baud. All measuring data from internal and external sensors are transmitted.
	Selector switch „device function“   Δp / Δp Δp / temperature Square-root signal	Configures the device function. 0 Setting of the device function via separate display 1 ... 5 Differential pressure sensor (output 1) / differential pressure sensor (output 2) 1 = 5000 Pa, 2 = 4000 Pa, 3 = 3000 Pa, 2 = 2000 Pa, 5 = 1000 Pa 6 ... 9 Differential pressure sensor (output 1) / temperature sensor (output 2) 6 = 1500 Pa, 7 = 1200 Pa, 8 = 900 Pa, 9 = 600 Pa A ... D Differential pressure sensor (output 1 - square-root signal for volume flow control) / temperature sensor (output 2) 6 = 1500 Pa, 7 = 1200 Pa, 8 = 900 Pa, 9 = 600 Pa
	Selector switch „device address 1-6“	Sets the device address for RECOMATIC control systems with R-IMC bus communication

Technical specifications Sensor	RM-XT 5004 RM-XT 5004 ATEX RM-XT 5004 5004 RM-XT 5004 5004 ATEX	RM-XT 10004 RM-XT 10004 ATEX RM-XT 10004 10004 RM-XT 10004 10004 ATEX
Measuring range	0 ... 5000 Pa	0 ... 10000 Pa
Output signal corresponds to measuring limit (adjustable)	4-20 mA ≙ 0 ... 5000 Pa	4-20 mA ≙ 0 ... 10000 Pa
Full scale output (FSO)	5000 Pa	10000 Pa
Accuracy (linearity and hysteresis)	≤ ± 1 %FSO ≙ ≤ ± 50 Pa	≤ ± 1 %FSO ≙ ≤ ± 100 Pa
One-side overpressure safety	70 kPa	70 kPa

Special measuring ranges and special calibrations are possible on customer request.

Technical specifications Device type	Values	RM-XT ...4	RM-XT ...4 ATEX	RM-XT ...4 ...4	RM-XT ...4 ...4 ATEX
Number of sensors	1 sensor			-	-
	2 sensors	-	-
Pressurised medium	Air and non-corrosive gases
Differential pressure connection	6/4 mm hose socket
Response time	10 ms
Burden	≤ 600 Ω
Repeating accuracy	≤ ± 0,2 % FSO
Ambient temperature range	-20 to +60°C
Humidity range of ambient air	0 ... 95 % relative humidity of air, non-condensing
Altitude	Up to 3000 m above sea level
For explosion proof areas	ATEX approval	-		-

Dimension drawings

Product selection

Product	P/N	Number of sensors	Measuring range
RM-XT 5004	10600742	1	0 ... 5000 Pa
RM-XT 10004	10600743	1	0 ... 10000 Pa
RM-XT 5004 5004	10600744	2	0 ... 5000 Pa
RM-XT 10004 10004	10600745	2	0 ... 10000 Pa
RM-XT 5004 ATEX	10600746	1	0 ... 5000 Pa
RM-XT 10004 ATEX	10600747	1	0 ... 10000 Pa
RM-XT 5004 5004 ATEX	10600748	2	0 ... 5000 Pa
RM-XT 10004 10004 ATEX	10600749	2	0 ... 10000 Pa

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