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13.3 Data Interfaces
13.3.1
Specification of the RS232 Interface
Type of interface: Serial interface
Level: RS 232
Parity: odd, even, none
Character transmission: Start bit, 7-bit ASCII, parity, 1 or 2 stop bits
Handshake
— For 2-wire interface: Software (XON | XOFF) or none
— For 4-wire interface: Hardware (CTS | RTS) or none
Data output of balance: 16 or 22 characters
Female interface connector: 9-pin D-Sub DB9S with screw connection
Maximum cable length: 15 m
Pin assignment
13.3.2 Specification for the USB-C Interface
Communication: USB OTG
Connectable devices: YRD01 operating and display unit or PC
13.4 Cabling Diagram (Cable)
For connecting a computer or other peripheral device to the weigh cell according to the RS-232C/V24 standard
Do not assign any other pins on the balance!
Balance
9-pin
Male connector
TxD 2
RxD 3
CTS 7
RST 8
GND 5
Fig. 9: Cable type: AWG 24 specification
Interface operation: Full duplex
Transmission rate: 600...115200 baud
Number of data bits: 7 or 8 bits
Pin 1: VDC IN 12–26 V
Pin 2: Data output (TxD)
Pin 3: Data input (RxD)
Pin 4: Not assigned
Pin 5: Internal ground
Pin 6: Not assigned
Pin 7: Clear to Send (CTS)
Pin 8: Request to Send (RTS)
Pin 9: Not assigned
Weigh Cell Operating Instructions
Technical Data
Computer
9-pin
Female connector
2
3
7
8
5
51
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