VL-1225/6 Analog Input/Output Board
3-1
Installation
Handling
CAUTION:
The VL-1225/6 card uses chips which are sensitive to static electricity discharges. Normal
precautions, such as discharging yourself, work stations, and tools to ground before touching the board
should be taken whenever the board is handled.
The board should also be protected during shipment or storage by placing it in a conductive bag (such as
the one it was received in) or by wrapping it in metal foil.
Installation
The VL-1225/6 card can be installed in any slot of an STD Bus card cage, excluding Slot-X in STD 32 cages,
and should only be used with other standard (TTL level bus) STD Bus boards. When inserting or extracting
the VL-1225/6, make sure the system power is off, also make sure the card is properly oriented (ejector
pointing up).
Priority Chain
The VL-1225/6 card does not use the STD Bus priority interrupt chain signals PCO (P51) and PCI (P52).
However, because PCI is connected to PCO on board, the card can be installed between cards using the
chain.
Signal Levels
The maximum non-destructive input voltage applied to any of the inputs on connector J1 is ±35V with
power on (±20V with power off). These voltages are measured with respect to analog ground. Each analog
channel presents a minimum input impedance of 1 x 10
8
W
.
The analog outputs (VL-1225 only) are capable of providing up to ±5 ma of current across the full output
span.
Installation
