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Chapter 3: Site Preparation 3-21
Cable Lengths and Hole Sizes
When selecting a cable, take care to choose one with enough length for
easy routing to the NCR 7870. Also, include enough slack to allow the
unit to be lifted from the cutout without disconnecting the cables. This
will be beneficial while servicing the unit.
Minimum hole size data is provided for making openings to pass
cables through the checkstand. Ensure after drilling that there are no
sharp edges which may damage the cable.
The following charts provide cable length and hole size data for AC
Power Cords, DC Power Cables, Interface Cables, and Remote Display
Cables. The NCR 7870 can connect to any NCR Retail Terminal as well
as many competitive host terminals so a comprehensive list of interface
cables has been provided.
Cable Hole Diameters
Cable Minimum Hole Size
Power Cord – Outlet to Power Supply 3.18 cm (1.25 in.)
Power Cable – Power Supply to 7870 1.52 cm (0.60 in.)
Interface Cable 1.90 cm (0.75 in.)
Remote Display Cable 1.90 cm (0.75 in.)
DC Power Cable – Power Supply to 7870
Minimum Hole Diameter: 1.52 cm (0.60 in.)
Cable Cable Length
DC Power Cable 1.22 Meters (4 Feet)
Note:
DC Power Cable length is not a factor if the Power Supply is
mounted on the chassis of the 7870 (Models 1000 and 2000 only).