Specifications

Chapter 12 149
Connecting the Instrument to a Handler with the Handler Interface
Electrical Characteristics
12. Connecting the
Instrument with a Handler
(Using the Handler Interface)
Input signals
Each input signal is connected to a photocoupler’s LED (cathode side). The LED (anode
side) is connected with drive voltage (EXT_DCV). Table 12-4 shows the electrical
characteristics of the input signals. Figure 12-4 also shows the circuit diagram for the input
signals. The amperage of the current fed through the LED depends on the drive voltage.
Figure 12-4 Circuit diagram for handler interface input signals
Table 12-5 Electrical characteristics of handler interface input signals
Input
Signals
Input voltage [V]
Input current (at Low level) [mA]
(typical value)
Low High
When drive
voltage = 12 V
When drive
voltage = 15 V
EXT_TRIG
0 to 1
Drive
voltage
(EXT_DCV)
4.6 5.9
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