AMX AXP-AI8 - Manual (Page 7)

Installation
3 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
1 2 3 4 5 6 7 8 ON