Valhalla Scientific 4300C, Руководство по эксплуатации

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19
Replace blown fuses with their exact equivalent only
Power Connector
The 3-prong power connector on the rear panel of the ohmmeter is for the application of AC power to the
instrument. The mating power cord is included with the instrument at time of purchase.
HLC Relay Terminal
The HLC relay terminal is internally wired to three relays which
are active only when the HLC mode is selected. According to the
result of the comparison, one of the relays will have its contacts
closed while the remaining two relays will have contacts open.
The standard "relay contact closure" feature allows an automated
sorting process to be set up at an economical cost. The screw type
terminal allows connections to wire or spade lugs. Contacts are
rated at 100V, 100mA. The truth table of the contacts is on page
29.
RS-232 Connector
The RS-232 serial interfacing is done through the 9-pin female D-Sub connector located on the rear panel
of the instrument. Knowledge of the specific pin functions of the serial connector may be necessary for
certain applications; Table 4 lists the pin assignment for the RS-232 connector.
Pin # Pin Function
1 No connection
2 Receive Data (RxD) (input)
3 Transmit Data (TxD) (output)
4 No connection
5 Signal Ground (GND)
6 No connection
7 No connection
8 No connection
9 No connection
Table 4 – RS-232 Pin out