2.4
DC-DC Converter Selection
To al low for slightly bet ter line ar ity across the full +/-10V in put range sup ported, an
op tional DC- DC con verter is popu lated at VR1. When in stalled, it pro vides +15V and -15V
to the ana log cir cuitry. This al lows the board to func tion with a +5 volt only sup ply.
Jumper blocks at J2 and J6 are jumpered to route the +12 and -12 volts from the PC/104
bus to the ana log cir cuitry when the DC- DC con verter is not in stalled.
WARN ING : The J2 and J6 jump ers should NEVER be in stalled when the DC- DC con -
verter is in stalled or dam age to the PCM-A/D board, other PC/104 mod ules, the CPU board,
or the power sup ply may re sult. Boards pro vided with DC- DC con vert ers from the fac tory
will not have the jumper posts in stalled at J2 and J6.
2.5
Input Mode Selection
The PCM-A/D is jumper se lecta ble for one of 4 in put modes. The sup ported modes are.
1. 16 single- ended uni po lar chan nels of 0-5V
2. 16 single- ended bi po lar chan nels of +/-10V
3. 8 dif fer en tial chan nels of 0-5V
4. 8 dif fer en tial chan nels of +/-10V
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PCM-A/D-12/16 OPERATIONS MANUAL
Page 2-3
WinSystems - "The Embedded Systems Authority"
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J7
J5
J1
J4
Mode configuration
jumpers J1, J4, J5, J7
