AC3 card - installation

The AC3 is a 16-bit ISA expansion card that is designed to fit into one of the 16-bit expansion slots provided in a PC. It is simple to install and connects directly to a standard Renishaw multiwire probe signal cable.

AC2 card diagram

 

CAUTION: The AC3 contains static sensitive components. Observe anti-static handling precautions, including the use of earth straps during handling and installation. Always consult the user manual or technical reference of your PC for specific instructions and warnings.

General instructions for installation of AC3

  1. Consult the documentation supplied with the PC for specific instructions and warnings.
  2. Remove power from the PC.
  3. Remove external covers of the PC (observe anti-static precautions).
  4. Locate a vacant 16-bit expansion slot into which the card can be fitted.
  5. Remove the expansion slot panel on the rear panel of the PC.
  6. Carefully insert the card into the slot in accordance to the PC manufacturer's instructions ensuring that no parts on the board touch any other adaptor boards or clash with any other parts of the PC.
  7. Screw the mounting bracket of the AC3 to the PC back panel rail. Check the installation.
  8. Replace the covers of the PC.

AC3 - current consumption

The nominal current consumption of the AC3 in normal operation with the probe connected is:

593 mA @ 5 V

17 mA @ 12 V

10.86 mA @ -12 V

AC3 - setting the I/O base address

The AC3 is supplied set to I/O base address 0200H, 16-bit wide data and ISA bus mode. If the base address is already used, or the PC has difficulty in accessing the card, then the base address can be changed to one of the following by altering the switches on the card as shown in the table below.

AC3 I/O space base address

PC function

Address

Switch (SW1)
Way 1

Switch (SW1)
Way 2

Switch (SW1)
Way 3

Switch (SW1)
Way 4

Games adaptor

0200H

Off

Off

Off

Off

PC expansion port

0210H

On

Off

Off

Off

Prototype adaptor

0280H

Off

On

Off

Off

Prototype adaptor

0300H

On

On

Off

Off

Not defined

0310H

Off

Off

On

Off

Not defined

0320H

On

Off

On

Off

Not defined

0340H

Off

On

On

Off

Not defined

0350H

On

On

On

Off

Not defined

0390H

Off

Off

Off

On

Not defined

03A0H

On

Off

Off

On

Not defined

0480H

Off

On

Off

On

Not defined

0520H

On

On

Off

On

Not defined

0540H

Off

Off

On

On

Not defined

0550H

On

Off

On

On

Not defined

0590H

Off

On

On

On

Not defined

05A0H

On

On

On

On

 

NOTE: All 16 address bits on the PC expansion bus are decoded. Clashes are still possible with the addresses of other adaptor cards if their base addresses are set below 0400H and match the lower bits of the AC3 addresses.

AC3 - switch settings

The AC3 can operate with 8 or 16 bit wide data and (with a suitable hardware adaptor) supports the ΔT (Delta Tau) bus used in some CMM controllers. SW2 allows these selections to be made (see table below).

AC3 SW2 settings

Switch setting

Switch (SW2)
Way 1
8 / 16 bit

Switch (SW2)
Way 2
BUS select

Switch (SW2)
Way 3
Connect in SP600 overtravel unit

Switch (SW2)
Way 4
Connect in SP25M over-range signal

OFF

16 bit

ISA BUS

OFF must be selected

-

ON

8 bit

ΔT BUS

-

ON must be selected

  

 

CAUTION: SW2 way 2 must be set correctly for ISA BUS operation, otherwise damage may be caused either to the AC3 or the host PC.

AC3 - card screening

The AC3 adopts the standard screening arrangement for IBM style PCs as shown below. If the host PC screening is different to this arrangement, then accuracy of the SP25M probe system may be impaired.

AC3 card