JUMO 902931 User Manual

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

8 Technology Boulevard
Canastota, NY 13032, USA
Phone: [phone]

1-800-554-JUMO
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

JUMO Wtrans Receiver
with Wireless Data Transmission

k For measuring temperature, pressure, potentiometer, and voltage.
k Interface RS485 with Modbus protocol
k Wireless measured value reception
k No wiring work due to modern wireless technology
k For up to 16 transmitters per receiver

The Wtrans receiver T01 in combination with suitable Wtrans transmitters is used for mobile or
stationary measurements of physical variables. A significant reduction of the installation work is
achieved due to the use of trendsetting wireless technology found in the industrial radio fre­quency 868.4 MHz or 915 MHz. Cable connections are not required, the radio-based sensor
technology also functions in a rough industrial environment. The supplied lambda/4-antenna
with an impedance of 50 ohm can be screwed on directly or fitted externally. If the antenna wall
holder with a 3 m antenna cable is used then the open air range is 300 m. In the receiver the
received measured values are converted, displayed, and are available as linear current or volt­age signals (0(4) to 20 mA, 0 to10 V) and via the digital interface RS485. All receiver outputs are
electrically isolated. The connection to higher-ranking systems (e.g. the plant visualization soft­ware JUMO SVS3000 or the Modbus master compatible paperless recorder JUMO LOGO­SCREEN nt) is possible via the digital interface with Modbus protocol.
Operation and configuration is possible via the keypad in connection with a 2-line LCD display
or a setup program for greater comfort. Thus, parameters such as filter constants, offset,
alarms, and drag indicator (minimum and maximum value memory) can be separately set for
each channel. For this purpose, a plug is provided on the front for a PC interface with TTL/
RS232 or USB/TTL converter to connect the receiver and the PC. The receiver in the mounting
rail case is intended for fitting on a DIN rail 35 mm × 7.5 mm according to DIN EN 60715. The
screw terminals for the electrical connection are arranged at different levels. The conductor
cross section may not exceed 2.5 mm

2

.

Data Sheet 902931

Basic type 902931/10

Page 1/10

Block diagram

Approvals/approval marks (see "Technical Data")

2012-06-20/00473257

Suitable
Wtrans transmitters

• Wtrans RTD temperature probe
Data sheet 902930

•Wtrans B
Data sheet 707060

•Wtrans p
Data sheet 402060

For further information see page 10/10

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

8 Technology Boulevard
Canastota, NY 13032, USA
Phone: [phone]

1-800-554-JUMO
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Data Sheet 902931 Page 2/10

Technical data

Input

Number of transmitters Up to 16 transmitters can be received per receiver.
Radio frequency 868.4 MHz (Europe);

Open air range Up to 300 m when using the antenna wall holder with a 3 m antenna cable

Measuring range limits Depending on the set sensor
Configuration Using the keys on the device or the setup program
Unit The units for temperature, pressure, potentiometer, and voltage

Analog outputs

Quantity 4 analog outputs for basic type 902931/10, 2 analog outputs for basic type 902931/30
Output signal:

- Current

- Voltage
Transmission behavior Linear, freely scalable
Burden (at current output) ≤ 500 ohm
Load (at voltage output) ≥ 10 k ohm
Setting time for temperature changes The setting time depends on the transmission interval that is set in the transmitter.
Setting time after switch-on or reset ≤ 5s
Calibration conditions AC 230 V/22 °C (±3 K) or DC 24 V/22 °C (±3 K)
Accuracy ≤ ±0.1 %

Residual ripple ≤ ±0.2 %
Electrical isolation The analog outputs are electrically isolated from each other and the interfaces.
Isolation voltage 50 V

915 MHz (America, Australia, Canada, and New Zealand);
Ten frequencies can be configured in the 915 MHz frequency band.

When installing the antenna directly to the receiver, a reduced range of approx. 40 % must be
taken into account.

are configurable on the device or with the setup program.

Configurable with the keys on the device or the setup program
Load-independent direct current 0 to20 mA or 4 to 20 mA
Direct voltage 0 to 10 V

1

(accuracy includes calibration, linearization, burden influence, load error,
and voltage supply error)

1

Measuring circuit monitoring of the analog outputs

Underrange

- Current output 4 to 20 mA

- Current output 0 to 20 mA

- Voltage output 0to10V

Dropping to 3.8 mA, then jump to the configured signaling
Dropping to -0.1 mA, then jump to the configured signaling
Dropping to -0.1 V, then jump to the configured signaling

Overrange

- Current output 4 to 20 mA

- Current output 0 to 20 mA

- Voltage output 0to10V

Increasing to 20.5 mA, then jump to the configured signaling
Increasing to 20.5 mA, then jump to the configured signaling
Increasing to 10.25 V, then jump to the configured signaling

Probe short-circuit or
Probe/cable break and alarms:

- Current output 4 to 20 mA

Positive signaling: > 21 mA
Negative signaling: < 3.6 mA

- Current output 0 to 20 mA

Positive signaling: > 21 mA
Negative signaling: < -0.1 mA

- Voltage output 0to10V

Positive signaling: > 10.5 V
Negative signaling: < -0.1 V

Output behavior The output behavior (positive or negative signaling) can be configured.

1

All accuracy specifications in % from the measuring range end value of 20 mA or 10 V.

2012-06-20/00473257

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

8 Technology Boulevard
Canastota, NY 13032, USA
Phone: [phone]

1-800-554-JUMO
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com

Data Sheet 902931 Page 3/10

Relay outputs

Quantity 2 relay outputs for basic type 902931/30
Relay N/O contact configurable as N/C contact
Switching capacity Up to 3 A at AC 230 V resistive load
Contact life 150,000 operations at 3 A / AC 230 V resistive load

350,000 operations at 1 A / AC 230 V resistive load
310,000 operations at 1 A / AC 230 V and cos phi > 0.7

Electrical isolation Relay to analog outputs and interface; test voltage AC 3700 V (reinforced insulation)

Relay to relay; test voltage AC 2300 V (basic insulation)

Combined operation of mains voltage AC 230 V and SELV or PELV voltage
is not admissible due to the basic insulation between the relays.

Electrical data

Voltage supply AC 110 to 240 V +10/-15 %, 48 to 63 Hz or AC/DC 20 to 30 V, 48 to 63 Hz
Power consumption 12 VA
Electrical connection Screw terminals up to 2.5 mm

2

Electrical safety According to DIN EN 61010, part 1

overvoltage category III,
pollution degree 2,

for installation into a control cabinet according to DIN EN 50178
Electrical isolation The voltage supply is electrically isolated from the analog outputs, relays, and interfaces.
Test voltage AC 3700 V

Environmental influences

Ambient temperature range -20 to +50 °C without condensation (even with close mounting)
Storage temperature range -30 to +70 °C
Temperature influence ≤ ±0.005 %

1

/K; per K deviation from the reference temperature 22 °C (±3 K)

Resistance to climatic conditions Rel. humidity ≤ 85 % without condensation according to DIN EN 60721-3-3 3K3
Vibration resistance Max. 1 g at 10 to 55 Hz according to DIN IEC 60068-2-6
EMC

- Interference emission

- Interference immunity

- Radio frequency spectrum

DIN EN 61326-1

Class A - only for industrial use -

Industrial requirements

ETSI EN 300 220-1 and ETSI EN 300 220-2

Case

Material Polyamide
Flammability class UL 94 V-2
Dimensions

With antenna screw connection (W × H × D) 22.5 mm × 115.0 mm × 117.8 mm
Installation DIN rail 35 mm × 7.5 mm according to EN 60715
Protection type IP20 according to DIN EN 60529
Installation position Vertical
Weight Approx. 200 g

Interfaces

1

All accuracy specifications in % from the measuring range end value of 20 mA or 10 V.

2012-06-20/00473257