SIWAREX WT231

Enclosure

Stainless steel enclosure (1.4301) with the interfaces:

• 1 x wall bushing for power supply
• 4 x wall bushing for load cell connection with EMC screw connection
• 4 x wall bushing with blanking plugs
• Ground connection bolt

Connection board

Internal connection board

• Connection of up to 4 load cells
• Type of analog output
• Type of 24 V direct voltage

Integration in automation systems

Any automation systems

Via RS 485 (Modbus RTU)

Communication interfaces

• RS 485 (Modbus RTU)
• 4 digital outputs (24 V DC)
• 4 digital inputs (24 V DC)
• 1 analog output (0/4 ... 20 mA)

Commissioning options for the scale

Directly via the color touch panel and the preinstalled "Ready for use" operating software

Calibration approval

No

Internal resolution

up to ± 4 million parts

Number of measurements/second (internal)

100 Hz

Filter

• Low-pass filter 0.1 ... 50 Hz
• Mean value filter

Weighing functions

Weight values

• Gross
• Net
• Tare

Limits

• Min/max
• Empty

Zeroing function

Per command

Tare function

Per command

Tare specification

Per command

Load cells

Strain gauges in 4-wire or 6-wire system

Load cell excitation

Supply voltage (regulated via feedback)

4.85 V DC

Permissible load resistance

• R_Lmin

> 40 ?

• R_Lmax

< 4 100 ?

With SIWAREX IS Ex interface

• R_Lmin

> 50 ?

• R_Lmax

< 4 100 ?

Load cell characteristic

1 … 4 mV/V

Permissible range of measuring signal
(at greatest set characteristic value)

-21.3 ... +21.3 mV

Max. distance of load cells

500 m (229.66 ft)

Auxiliary power supply

Rated voltage

100 ... 240 V AC

Line frequency

50 ... 60 Hz

Max. power consumption

0.12 A

IP degree of protection to DIN EN 60529; IEC 60529

IP65

Climatic requirements
T_{min (IND) ...} T_{max (IND)} (operating temperature)

Vertical installation

0 ... +40 °C (32 ... 104 °F)

EMC requirements according to

EN 45501

Dimensions

264 x 185 x 97 mm (10.39 x 7.28 x 3.82 in)

Weight

4 kg (8.82 lb)