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overvoltage and short circuit protection functions. Current loop allows open circuit, will not
damage the device. There is current open circuit indicator on the panel for users to check if
wiring corrected. The panel also with over-voltage or short circuit indicators, when there was
short circuit on voltage circuit (if with output), the indicator will be on and start the buzzer
alarm. The high current limits use a unique hardware, limit circuit, overcome the shortcomings
of traditional software, and make it more safe and reliable.
5. Switch input and output
This tester with 8 pairs input terminals and 4 pairs output terminals.
Both switch input and output are composed by optoelectronic isolator and 24V DC relays,
its working power is independent 24V working power, so there is 24V DC voltage between
COM and switch input.
The followings are wiring diagram for common switch input:
(1) Charged dead contact
(2) Potential flip
Summary of Contents for HT-802
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