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Chapter 3 configuration pb-tim2 user’s manual – Kontron PB-TIM2 User Manual

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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