AMX AXP-AI8 ANALOG 8-INPUT BOARD Instruction Manual download pdf (Page 7)

Installation

AXP-AI8 Eight-Channel Analog Interface Board

Installation

Configuring Switches

Setting the Device DIP Switch

Use the eight-position device DIP switch to set the AXP-AI8 as an AXlink device. It can be one of

255 devices in an Axcess system. The device number must match the assignment of the device in

the Axcess program. Set the device number with the total of all ON (down) positions. For example,

the DIP switch below defines device number 129 (1+128=129).

AMX standard device numbers are assigned as follows:

 Cards are 1 through 95.

 Boxes are 96 through 127.

 Panels are 128 through 255.

The device number takes effect only on power-up. If you later change the device number, remove

and reconnect the AXlink connector. This enters the new device number into memory.

Setting the input SIP switch

Set the SIP switch positions to ON (down) to disable the corresponding unused inputs. For

example, switch position 1 corresponds to input 1. In the illustration above, switches 1 and 8 are

ON, designating that input 1 and 8 are disabled.

The default setting is all switch positions set to off, enabling all inputs.

Setting the joystick range POTs

Most applications will use the factory default setting of the POTs and do not require any

adjustment. In applications where the input signal is not powered by the AXP-AI8 board and the

maximum input voltage range is less than 5 Volts, the output reading may be adjusted closer to full

scale, providing greater resolution.

Determine the maximum voltage that will be input to the board. Make sure that the 'LO' POT

(bottom right of board) (FIG. 3) is turned all of the way to counter-clockwise. Place the leads from

a voltmeter across the 'HI' and 'LO' reference test points located on the right side of the board and

adjust the 'HI' POT (bottom right of board) (FIG. 3) until the voltage on the meter matches the

maximum that will be input.

Switch 1 2 3 4 5 6 7 8

Value 1 2 4 8 16 32 64 128

FIG. 3 AXP-AI8 POTs

12345678

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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AMX AXP-AI8 ANALOG 8-INPUT BOARD Instruction Manual Page 7