ABB AC500-S Safety User Manual page 88

AC500-S safety modules
DX581-S safety digital input/output module > Functionality
Table 6: Input delay accuracy for DX581-S
Input delay (ms)
1
2
5
10
15
30
50
100
200
500
● Checking of process power supply (diagnostic message is sent from the safety I/O module
to the CPU informing about the lack of process power supply for the given safety I/O
module). This function is a non-safety one and is not related to the internal safety-relevant
over- and undervoltage detection.
● 2 channel equivalent and 2 channel antivalent mode with discrepancy time monitoring (con-
figurable 10 ms ... 30 s).
88
DANGER!
The input delay parameter means that signals with the duration shorter than
input delay value are always not captured by the safety module.
The signals with the duration of equal to or longer than "input delay parameter"
+ "input delay accuracy" are always captured by the safety module, provided
that the allowed frequency (refer to previous notice) of the safety input signal is
not exceeded.
The "input delay accuracy" can be estimated based on the following assump-
tions:
– If no test pulses are configured for the given safety digital input, then input
delay accuracy can be calculated as 1 % of set input delay value (however,
input delay accuracy value must be at least 0.5 ms!).
– If test pulses are configured for the given safety digital input of DX581-S
module, then the input delay accuracy values can be estimated based on
the input delay parameter value
S" on page 88.
NOTICE!
In a 2 channel mode, the lower channel (channels 0/4 ➔ Channel 0, channels
1/5 ➔ Channel 1, etc.) transports the aggregated process value, PROFIsafe
diagnostic bit, acknowledgment request and acknowledge reintegration informa-
tion. The higher channel always provides the passivated value "0".
3ADR025091M0208, 12, en_US
Ä Table 6 "Input delay accuracy for DX581-
Input delay accuracy (ms)
2
2
3
4
5
6
10
15
25
50
2020/06/19