B&B Electronics 2IQEC2, 2IQEC4 manual Introduction, Packing List, Address Switch Setup

Chapter 1: Introduction

The 2IQEC2/4 is a 2/4 channel quadrature encoder 24 bit counter card used to track the position of up to 4 separate encoders. This card is an ISA card that can be used in either an 8 or 16 bit slot. This card allows the computer to keep track of position without a lot of CPU overhead, freeing it up for more important tasks.

The 2IQEC2/4 offers a huge amount of flexibility. Upon a borrow or carry the card can be configured to reset, load a preset, cause an interrupt request or simply send out a TTL signal to indicate the carry or borrow. The card contains two inputs that can be configured to clear the counter or load the preset into the counter. The index lines may also be used to clear the counter, load the preset or cause an interrupt. The four channels use IRQ sharing to prevent all the computer's resources from being taken up by this card. The interrupt service routine can poll the card to find out which channel caused the interrupt request.

Packing List

Examine the shipping carton and contents for physical damage. The following items should be in the shipping carton:

1.2IQEC2 or 2IQEC4

2.2IQEC2/4 3.5" disk

3.This instruction manual

If any of these items are damaged or missing contact B&B Electronics immediately.

Address Switch Setup

The 2IQEC2/4 cards use a 7-position DIP switch to program the binary I/O address of each port on the card. The 2IQEC2/4 cards are factory configured for address 0x300 with no IRQ. If you plan on installing the 2IQEC2/4 with these settings, check the switch settings to ensure that they did not get inadvertently changed during shipping.

2IQEC2/43798 Manual 1

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