Metrohm 762 IC Interface - Manual (Page 34)

4 Appendix
762 IC Interface
30
FIFO 0 … 16 Bytes (for Dev. 8 not available)
Pin assignment Pin 2: RxD (Received Data) for Dev. 1 … 4
Pin 3: TxD (Transmitted Data) for Dev. 1 … 4
Pin 5: GND (Signal Ground) for Dev. 1 … 4
Pin 7: TxD (Transmitted Data) for Dev. 5 … 8
Pin 8: RxD (Received Data) for Dev. 5 … 8
Pin 9: GND (Signal Ground) for Dev. 5 … 8
Remote interface (Events)
Output lines 7 potential-free relay contacts per system for
controlling external instruments.
RUN
COM
Maximum contact load:
30 V / 1 A DC
Input lines 1 digital input per system for external method
start.
+5V
470k
47k
Ext. Start
RUN
COM
Maximum load for external contact:
approx. 0.1 mA at max. cut-off voltage of approx.
5 V
Analog signal interface
Function 2 potential-free analog signal inputs per system.
Connector Dsub connector 9 pin (female)
1 5
6 9
Input voltage range ± 2.5 V
Input amplification 1, 2, 4, 8, 16, 32, 64 (selectable)
Sampling rate 10, 20, 30, 50, 60 measuring points/s
Resolution 24 bit (1 LSP = 0.298 µ V at amplification 1)
Noise < 20 µ Vpp
< 3 µ Vrms (at 0 V input voltage, amplification 1
and sampling rate 10 Hz)