Chapter 3 configuration pb-tim2 user’s manual – Kontron PB-TIM2 User Manual
Page 18
Chapter 3 Configuration
PB-TIM2 User’s Manual
3.1.1 Input Electrical Specification
The 10 inputs (3 per counter and one common) are all optoisolated from the supply with a rating of 1500V. Isolation
between the inputs is rated at 100V. The inputs (A), (B) and (C) all have separated differential inputs while the common
clear is referenced to V-. The inputs are protected against reverse voltage and sink typically 15mA.
Note
For those customers possessing the PB-TIM2 without optoisolation for improved speed performance,
the TTL inputs need to be inverted to maintain the characteristics laid down in this manual.
The inputs may be configured to cater for different operational voltages and frequency limits.
3.1.1.1 Input Voltage Selection
The following table shows the association between component values and operational voltages.
Input
Component
A0
D1
B0
D3
C0
D5
A1
D8
5V Operation
12V Operation
24V Operation
B1
D10
0 Ohm Resistor
6.8V Zener Diode
18V Zener Diode
C1
D12
A2
D15
B2
D17
C2
D19
Clear
D22
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© 1996 PEP Modular Computers
July 30, 1997