Siemens NCU 7x0.3 PN Series Manual page 75

Digital inputs/outputs at X122 / X132 / X142
Table 7- 29
Parameters
Voltage
Typical current consumption
Signal level (including ripple)
Signal propagation delays of inputs / "rapid
inputs"
Voltage
Maximum load current per output
Output delay (typ. / max.)
Switching frequency
max. lamp load
1)
NOTICE
An open input is interpreted as "low".
Only "rapid inputs" can be used as inputs for BEROs and probes.
Terminals G1 or G2 must be connected for the digital inputs to work. This can be done as
follows:
Connect the coupled-motion ground reference of the digital inputs or provide a jumper to
terminal M. (Notice! This removes the galvanic isolation for these digital inputs.)
Note
For a transient (brief) voltage interruption of the 24 V supply, the digital outputs are switched
inactive for this time.
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
Technical data of the digital inputs/outputs of X122 / X132 / X142
1)
Data for: V = 24 V; load 48 Ω; High = 90 % V
cc
Values
As an input
-30 V to +30 V DC
9 mA at 24 V DC
High signal level: 15 V to 30 V
Low signal level: -3 V to 5 V
L → H: 50 μs/5 μs
H → L: 100 μs / 50 μs
As an output
24 V DC
500 mA continuously short circuit-proof
L → H: 150 μs / 400 μs
H → L: 75 μs / 100 μs
for resistive load: max. 100 Hz
for inductive load: max. 0.5 Hz
for lamp load: max. 10 Hz
5 W
; Low = 10 % V
out out
Connecting
7.9 Digital inputs/outputs
75