BST100-B21 is mainly used for weighing, feeding&batching systems of belt scale. It adopts ∑-△A/D conversion technology and broad-range speed pulse input circuit. Max. 8 loadcells are connectable. The functions of segmenting calibration, zero auto- tracking, key-locking & auto-locking, full digital setting & calibration, system start&stop control, feeding closed-loop control and so on are available.

Technical Specifications :
　
　 　Power Supply　　　　　　　　　　　　　　　　　　　　　　　　　
　　　 Operating Voltage 1: AC220V, -15%~+10%.　　　　　　　　　　　　　　 　　　
　　　 Operating Voltage 2: AC85~264V.　　　　　　　　　　　　　　　　
　　　 Operating Frequency: 50Hz, ±2%.　　　　　　　　　　　　　　　　　　
　　　 Max. Power: 20W.
　 　Display
　　　 16-bit red LED digital display.
　 　Keypad
　　　 6 keys for Menu operation with key tone.　　　　　　　　　　　
　　　 Key-locking and Auto-locking.　　　　　　　　　　　　　　　
　 　Load Cell Signal Input Interface (SENSOR/LOADCELL) 　　　　　　　　　
　　　 Excitation Voltage Output: DC10V.　　　　　　　　　　　　　　
　　　 1 Weighing Input Signal: 0~30mV or 0/4~20mA.
　　　 Wiring Modes: 6-wire, 4-wire and 2-wire.
　　　 Max. Connection Number: 8 Loadcells (350Ω, 0.5~3.0mV/V).
　 　A/D Converter
　　　 24-bit ∑-△ADC.
　　　 Sampling Frequency: Max. 100Hz.
　 　Speed Sensor Signal Input Interface(SENSOR/SPEED)
　　　 1 Speed Pulse Input Signal.
　　　 Frequency Range:0.5~5000Hz.
　　　 Power Supply Output:DC5~12V(adjustable),Max.100mA.
　 　Analog Signal Output Interface(AO)
　　　 Max.3 Analog Output Signals:4~20mA.(AO3:optional)
　　　 Accuracy:±0.1%FS.
　　　 Definalbe:Flow Set-Point Input,Belt Angle Compensation Input,etc.
　 　Analog Signal Input Interface(AI)
　　　 1 Analog Input Signal:4~20mA.
　　　 Accuracy:±0.1%FS.
　　　 Definalbe:Flow Set-Point Input,Belt Angle Compensation Input,etc.
　 　Totalized Weight High-Speed Pulse Signal Output Interface(PO)
　　　 1 Open-Collector Output.
　　　 Capacity of Contacts:100mA,DC5~24V.
　　　 Weight per Pulse and Pulse Width can be Preset.
　 　Relay/Transistor Switch Signal Output Interface(DO)
　　　 4 Normally Open Relays or Transistor Switch Outputs.
　　　 Capacity of Relay Switch:AC25V/DC24V,1A.
　　　 Capacity of Transistor Switch:DC24V,500mA.
　　　 Definable:Flow/Load/Speed/PID/Flow Deviation Limit Alarm,Totalized Weight Low Speed Pulse,Auto[PID]/Flow Outer Setting/Calibrating/Running State,Output DI1/DI2/DI3 Signal,Serial Port Set,Feeder Control,Scale Control,Batch-Finish,etc.
　 　Digital Switch Signal Input Interface(DI)
　　　 3 DI Switch Input.
　　　 Definalbe:Weighing/PID Control Switch,System Ready,Zero Calibration,Clear Screen,Start Control,Stop Control,etc.
　 　Digital Communication Interface (COM)
　　　 COM1 Optional:RS485,Profibus-DP,Ethernet,CANBUS,Wireless Module(Only for BST100-B21),etc.
　　　 COM2: RS232.
　　　 Connectable: IPC/PLC, Remote Display, Remote Operating Terminal, Serial Printer, Wireless Module, etc.
　　　 Power Supply Output: DC5V, 100mA
　 　Weight Record Save&Print
　　　 Weight record per Shift/Day/Month of a year can be auto-saved and printed.