VX-11 FAMILY
GENERAL PURPOSE CHASSIS
Control Panels
Zoltech offers a variety of control panels for the VX-11 chassis:
- NFB No-Function Blank
- SPP-Vx Power Switch Only
- SCP-Vx Full-Function
A VX-11 control panel assembly consists of a number of parts, depending on the application. VX-11 front panels have two types of control panel openings: Either a rectangular hole, about 2"W x 4½"H or a group of four smaller square and rectangular holes. The larger hole provides clearance for a control panel mounting bracket. The bracket fastens to the bottom panel of the main chassis. The bracket then provides mounting for the other control panel parts. One of these parts is a nomenclature plate that goes on the front of the bracket to label the functions of the switches and indicators. The alternate opening, the group of four small holes, provides mechanical mounting for the power switch and clearance for the other switches and indicators. The same nomenclature plate that was used with the control panel mounting bracket goes on the front panel, over the four holes. In this case, the control panel PCB itself is fastened directly to the front panel rather than to the bottom panel via the bracket. The type of control panel opening used depends on whether the front panel must be removed for normal assembly or maintenance. If maintenance removal of the front panel is required, the control panel will be mounted on the bracket so that it will stay with the main chassis even when the front panel is removed. If the front panel is rarely removed from the chassis, then the alternate (four small holes) opening is used. The appropriate mounting hardware and nomenclature plate is included with each control panel.
The No-Function Blank (NFB) has no specific orientation. It is simply a blank cover panel for the control panel opening that is present in most VX-11 front panels. Since front panels without control panel openings are available, the NFB panel is rarely required.
The Power Switch Only (SPP-x) panels provide a rocker switch intended to control the AC power in a chassis. There are two power switch options available: the normal power switch has DPDT contacts rated at 6A @ 250V and is not illuminated. The -xA switch has contacts rated at 16A @ 250V (80A inrush) and includes a neon lamp current limited for 110VAC for illumination. When used with the AC PDA, the SPP-x switches control both sides of the AC input. The switch is marked with the universal I and O.
SCP-Vx Full-Function Control Panel Features
The Full-Function Control Panel (SCP-Vx) was originally designed for use in VME and
Multibus II systems, but its configurability allows it to be used in many applications. It
includes a power switch, two push buttons and two indicators plus an AC power failure detector.
Using the standard nomenclature plate, one of the buttons is labelled RESET and the other is
labelled ABORT. A green LED indicator is labelled DC PWR and a red LED indicator is labelled
SYSFAIL. The functions of the control panel are configured with a group of jumpers. The
outputs from the buttons are debounced. They can be configured to produce either a logic level
or a 300ms pulse, active high or low, when pressed. The inputs to the indicators can also
be configured active high or low. The AC failure detection circuit works in conjunction with
the line frequency pulse generator on the AC PDA. If there is no pulse for more than 25ms, an
AC fail signal is generated. A line frequency signal is also continuously generated. The
control panel also generates a Power-On-Reset signal on the desiganted RESET output. All
outputs are open-collector TTL (7406). All inputs are LS-TTL (except the line frequency input,
which has a 100K pull-up). Other than the power switch, the control panel requires +5VDC to
operate.
Detailed specifications are available on request.
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