Hioki ST5540 - Internal Circuit Configuration

9.4 Internal Circuit Configuration
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The following shows the EXT I/O terminal circuit configuration.
9.4 Internal Circuit Configuration
• Insulating the signal wires prevents signal interference. Be sure to ground
external equipment connected to the instrument. If protective earthing is not
provided, insulation damage may result.
• The maximum Low-level output current of the output photocoupler is 50 mA. If
current higher than 50 mA is required, connect an external current amplifica-
tion transistor circuit that operates on an external power supply.