Weighing modes

• Non-automatic scales (filling + removal) (in accordance with OIML R-76)
• Automatic scales for single weighing (filling + removal) (in accordance with OIML R-51)
• Automatic scales for batching (in accordance with OIML R-61)

Integration in automation systems

S7-1200

SIMATIC S7-1200 system bus

Operator panel and/or automation systems from other vendors

Via Ethernet (Modbus TCP/IP) or RS 485 (Modbus RTU)

Ports

• 1 x SIMATIC S7-1200 system bus
• 1 x Ethernet (SIWATOOL and Modbus TCP/IP)
• 1 x RS 485 (Modbus RTU or remote display)
• 1 x analog output (0/4 ... 20 mA)
• 4 x digital inputs (24 V DC, floating)
• 4 x digital outputs (24 V DC, floating, short-circuit proof)

Functions

• 3 limits
• Tare
• Tare specification
• Set to zero
• Zero adjustment
• Statistics
• Automatic correction of the shut-off points
• Internal protocol memory for 550 000 entries
• Trace function for signal analysis
• Internal restore point
• Stand-alone mode or SIMATIC S7-1200 integrated

Parameter assignment

• Full access using function block in SIMATIC S7-1200
• Full access using Modbus TCP/IP
• Full access using Modbus RTU

Remote display

Connection

via RS 485

Setting the scales

PC software SIWATOOL (Ethernet), S7-1200 function block and touch panel or directly connected operator panel (Modbus)

Measuring accuracy

Error limit according to DIN 1319-1 of full-scale value at 20 °C ± 10 K (68 °F ± 10 K)

0.05%

Internal resolution

Up to ±4 million parts

Number of measurements/second

100 or 120 (selectable)

Filter

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

Load cells

Full-bridge strain gauges in 4-wire or 6-wire system

Load cell powering

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 the measurement signal (with 4 mV/V sensors)

-21.3 ... +21.3 mV

Max. distance of load cells

500 m (229.66 ft)

Connection to load cells in Ex zone 1

Optionally via SIWAREX IS Ex interface

Certificates

• ATEX Zone 2
• UL
• KCC
• EAC
• RCM

Auxiliary power supply

Rated voltage

24 V DC

Max. power consumption

200 mA

Max. power consumption SIMATIC Bus

3 mA

IP degree of protection according to DIN EN 60529; IEC 60529

IP20

Climatic requirements
T_min(IND) ... T_max(IND) (operating temperature)

• Vertical installation

-10 ... +40 °C (14 ... 104 °F)

• Horizontal installation

-10 ... +55 °C (14 ... 131 °F)

EMC requirements

according to EN 45501

Dimensions

70 x 75 x 100 mm (2.76 x 2.95 x 3.94 in)