Siemens simatic s7-400 FM 450-1 User Manual page 117

Status, interrupts, diagnostics
Status display
Interrupts
Hardware interrupt
•
Diagnostic interrupt
•
Diagnostics functions
Fault indication for internal and external faults
•
Reading diagnostics information
•
Data to the count signals and the digital inputs and outputs (applies to both counters)
Counter inputs 5 V (A , /A; B, /B; N, /N)
Level
•
Terminating resistor
•
Differential input voltage
•
Maximum count frequency
•
Electrical isolation toward S7-400 bus
•
Counter inputs 24 V (A*, B*, N*)
Low Level
•
High level
•
Input current
•
Minimum pulse width (maximum count frequency) ≥ 2.5 µs (200 kHz)
•
Digital inputs
Low Level
•
High level
•
Input current
•
Minimum pulse width (maximum input frequency)
•
Counter module FM 450-1
Manual, 02/2014, A5E03648739-02
Yes, 14 green LEDs for status of CR, DIR, inputs and outputs
Yes, configurable
Yes, configurable
Yes
Yes, 2 red LEDs
Yes
In compliance with RS 422
approx. 220 Ohms
Min. 0.5 V
500 kHz
No
- 30 ... + 5 V
+ 11 ... + 30 V
Typically 9 mA
≥ 25 µs (20 kHz)
(configurable)
- 28.8 ... + 5 V
+ 11 ... + 28.8 V
Typically 9 mA
≥ 2.5 µs (200 kHz)
≥ 25 µs (20 kHz)
(configurable)
Technical Data
12.2 Technical Data
117