Safe digital input (F-DI00)
Digital inputs DI01 and DI02 can be connected for use as safe digital input F-DI00. Digital input DI01 corresponds to input F‑DI00_A, and digital input DI02 corresponds to safe digital input F‑DI00_B. Within the MOVISAFE® CS..A safety option, signal processing of the safe digital input is performed in two-channel mode. The safe digital input is therefore suitable for applications up to SIL 2 pursuant to EN 61508 and performance level d pursuant to EN ISO 13849-1. The following sensors to be connected externally and their wiring must be in compliance with the required safety class.
- Sensors that either switch the F-SS0 sensor supply with active pulsed voltage supply through to the safe digital input F-DI00 or block it. The time behavior of the pulsed voltage supply must not be influenced by the sensor.
- The F-SS0 sensor supply may only be used for the safe digital input of the same safety option.
- Electronic sensors or evaluation devices that automatically generate test pulses (switch-on or switch-off pulses) on the input signals, the duration of which is < 1 ms.
- Any signal sources that generate a DC input signal within the scope of the specification of F-DI00.
Note the connection diagrams in the chapter "Electrical installation" > "Connection examples for safe digital inputs (F-DI00)". The range of connection variants might be limited depending on the sensor type. Also observe the chapters Requirements for external sensors and the general installation instructions.
Possible contact bounce and interference can be filtered out by a parameterizable input filter. Contact bounces and interferences that are shorter than the set filter time are removed from the signal.
Unassigned inputs need not be wired. An open input is always read as a "0" signal. The safe state of the safe digital input is evident in the output of "logical 0" on the associated process value.
The MOVISAFE® CS..A safety option evaluates the safe digital input as follows.
Connection type two-channel equivalent (NC contact/NC contact):
F‑DI00_A logic level input terminal | F‑DI00_B logic level input terminal | F‑DI00 process value |
|---|---|---|
0 | 0 | 0 |
0 | 1 | 0 |
1 | 0 | 0 |
1 | 1 | 1 |
Connection type two-channel non-equivalent (NC contact/NO contact):
F‑DI00_A logic level input terminal | F‑DI00_B logic level input terminal | F‑DI00 process value |
|---|---|---|
0 | 0 | 0 |
0 | 1 | 0 |
1 | 0 | 1 |
1 | 1 | 0 |
