Siemens NCU 7x0.3 PN Series - Page 75

Connecting
7.9 Digital inputs/outputs
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
75
Digital inputs/outputs at X122 / X132 / X142
Table 7- 29 Technical data of the digital inputs/outputs of X122 / X132 / X142
Parameters Values
As an input
Voltage -30 V to +30 V DC
Typical current consumption 9 mA at 24 V DC
Signal level (including ripple) High signal level: 15 V to 30 V
Low signal level: -3 V to 5 V
L → H: 50 μs/5 μs Signal propagation delays of inputs / "rapid
inputs"
H → L: 100 μs / 50 μs
As an output
Voltage 24 V DC
Maximum load current per output 500 mA continuously short circuit-proof
Output delay (typ. / max.)
1)
L → H: 150 μs / 400 μs
H → L: 75 μs / 100 μs
Switching frequency for resistive load: max. 100 Hz
for inductive load: max. 0.5 Hz
for lamp load: max. 10 Hz
max. lamp load 5 W
1)
Data for: V
cc
= 24 V; load 48 Ω; High = 90 % V
out
; Low = 10 % V
out
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.