KL2212 - Introduction
KL2212 – Bus Terminal, 2-channel digital output, 24 VDC, 0.5 A, with diagnostics
The KL2212 digital output terminal connects the binary control signals from the automation unit on to the actuators at the process level with electrical isolation. The load current output of the KL2212 version is protected against overload and short circuit. A short circuit or an open lead is detected, and the terminal status is relayed to the controller via the K-bus. The Bus Terminals each contain two channels that indicate their signal state and errors by means of light emitting diodes.
Diagnostics per channel
Diagnostic bit 2 | Diagnostic bit 1 | Error LED red | Signal LED green | Diagnostic message |
|---|---|---|---|---|
0 | 0 | 0 | 0 | OK |
0 | 1 | 1 | 1 | short circuit to UP (VCC), no load (wire break / open load) |
1 | 0 | 1 | 0 | short circuit to 0 V |
1 | 1 | 1 | 0 | undervoltage |
In case of a short circuit to UP (VCC) or open lines, although the output is driven, the green and red LED are on.
In case of a short circuit to 0 V (short circuit) the output is switched off. The limit value is 0.95 A.
Undervoltage is present when the applied supply voltage is less than 12 V.