KEBA HT-401-222-4/0/21572 Handterminal

The KEBA HT‑401‑222‑4/0/21572 is a handheld teach‑pendant terminal used to program and monitor industrial automation controllers, typically powered at 24 V DC with a current rating of ~0.3 A. Common failure points for this class of devices include damaged membrane keypad switches, degraded LCD backlight or display circuitry, power supply input faults (e.g., blown fuses or worn regulator ICs), and connector wear on the USB/serial interface. First‑check diagnostics should verify the 24 V DC input voltage and continuity to the terminal’s power rails, inspect the keypad for stuck or non‑responsive keys and test the display for backlight or pixel faults, then review any error codes displayed on the screen or logged in the connected controller.[oss-gpt-20b]

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