9
RX1
GND
Not used
TX2 RS232C
TXD (OP-01)
RX2
RS232C RXD (OP-01)
GND
RS232C GND (OP-01)
EX+
EX-
SIG+
SIG-
GNG
Not used
POWER
ZERO
TARE
HOLD
GND
External key 4 contact / 4inputs (OP-01)
“HOLD” mark is the same as “kg/lb”
EVCC+
OUT1
EVCC+
OUT2
2 solid state relays contact (OP-01)