01/2007
2.11 I/O module PP72/48
2-86
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
S Electrical specification of the digital outputs:
Table 2-19 Electrical specification of the digital outputs
Digital outputs
Min. Typical Max. 5 A Nominal
Voltage at high signal level (U
H)
V
CC
– 3 V
1)
V
CC
24V
Output current I
OUT
– – 250mA –
Voltage at low signal level (U
L)
– – – Output
open
Leakage current at low level – 50mA 400mA –
Signal delay time T
PHL
2)
– 0.5 ms – –
Maximum switching frequency
2)
Resistive load 100Hz – – –
Inductive load 2Hz – – –
Lamp 11Hz – – –
S 1)
U
H_typical
= V
CC
– I
OUT
R
ON
V
CC
: actual operating voltage
I
OUT
: maximum output current (see above)
maximum short–circuit current: 4A (max. 100ms, V
CC
= 24V)
R
ON
: internal resistance = 0.4W
S 2)
Moreover, the PROFIBUS communication time and the application cycle time must
be taken into account.
S Incorrect connection causes neither high level nor destruction of the outputs.
S General electrical properties
– No electrical isolation
– Current limitation to maximum 500 mA
– Protection against: short–circuit, overtemperature, and loss of ground
– Automatic disconnection in case of undervoltage
2 Hardware Descri
tions
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