EL3122 - Connection, display and diagnostics
Connection EL3122 | ||||
|---|---|---|---|---|
Terminal point | Description | Internally connected | Max. current carrying capacity *) | |
Name | No. | |||
+ Input 1 | 1 | + Input 1 | - | 40 mA |
- Input 1 | 2 | - Input 1 | - | 40 mA |
GND | 3 | Signal ground for input 1 | 7, (high impedance, therefore potential equal but not current loadable) | 40 mA |
Shield | 4 | Shield (FE) | 8; DIN rail | 100 mA **) |
+ Input 2 | 5 | + Input 2 | - | 40 mA |
- Input 2 | 6 | - Input 2 | - | 40 mA |
GND | 7 | Signal ground for input 2 | 3, (high impedance, therefore potential equal but not current loadable) | 40 mA |
Shield | 8 | Shield (FE) | 4; DIN rail | 100 mA **) |
*) Constant and peak value
**) Shield lines should be de-energized!
 | GND connection points The GND connection points of the terminal are not connected internally directly, but via EMC protection components. Therefore, each analog encoder/sensor must be connected separately with 2 wires, even if the connection diagram of the terminal for the channels indicates a common ground (GND). |
| Current carrying capacity of the input contacts The maximum permitted current on the signal-relevant terminal points (inputs, GND) is 40 mA (if applicable). |
Notice | |
Terminal GND and system GND The signal ground GND of this terminal is not internally connected to the negative power contact. This design allows GND to be connected to a ground other than the negative power contact "Power contact 0V" if necessary. |
| Overcurrent protection of the 20 mA inputs The current inputs are protected against damage by overcurrent by an internal current limitation, currents > 30mA may occur. In the event of a fault, the current limiter must not be overloaded by a voltage > 30V from the source device. Overcurrent is displayed in the process image as "Overrange". After occurrence, the error condition must be stopped immediately, the source device switched off or disconnected from the input terminal. If the error condition persists for a longer period of time, the internal terminal current limitation reduces the absorbed signal current for thermal reasons, depending on the ambient conditions also below 20 mA. |
LEDs | |||
|---|---|---|---|
LED | Color | Meaning | |
RUN* | green | This LED indicates the terminal's operating state *: | |
off | State of the EtherCAT State Machine: INIT = initialization of the terminal or BOOTSTRAP = function for firmware updates of the terminal | ||
flashing | State of the EtherCAT State Machine: PREOP = function for mailbox communication and different standard-settings set | ||
single flash | State of the EtherCAT State Machine: SAFEOP = verification of the Sync Manager channels and the distributed clocks. | ||
on | State of the EtherCAT State Machine: OP = normal operating state; mailbox and process data communication is possible | ||
ERROR** | red | Fault indication in the event of undershooting or overshooting of the measuring range | |
*) If several RUN LEDs are present, all of them have the same function **) The error display shows the signal processing state for each channel | |||