Digital modules
8.7 SM 326; F-DO 10 x DC 24V/2A PP (6ES7326-2BF10-0AB0)
Fail-safe signal modules
170
Installation and Operating Manual, 01/2010, A5E00085586-10
Wiring scheme
Interconnect two
opposite outputs with assigned redundancy to form a single output. The
parallel circuit in combination with an internal test coordination between the outputs 0 to 4
and 5 to 9 suppresses the "0" test pulse (dark period).
/
0
'2
'2
/
0
/
0
60
)'2['&9$33
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Figure 8-59 Wiring two outputs in parallel for dark period suppression of the SM 326; F-DO 10 x DC
24V/2A PP
Note
Use the same reference potential for 2M and 3M.
Note
If you are using actuators that respond too fast (< 1 ms) to "dark period" test signals, you can
nonetheless use the internal test coordination by wiring two opposite outputs in parallel (with
assigned redundancy). Parallel wiring suppresses the dark periods.
Parameters
Range of values
Type
Effective
range
"Parameters" tab
Mode of operation
Safety mode
static
module
F_Monitoring_Time (ms)
10 ms to 10000 ms
Static
Module
Diagnostic interrupt
Activated/deactivated
Static
Module
Fail-safe value
Switch to fail-safe value
Keep last valid value
Static
Module
Maximum test period
100 / 1000 s
Static
Module
Load voltage failure diagnostics
Activated/deactivated
Static
Channel
group
Activated
Activated/deactivated
Static
channel
Содержание Simatic S7-300
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