Kontron PB-TIM2 - 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
Page 3-2 © 1996 PEP Modular Computers July 30, 1997