ST950S Plus+ Installation and Commissioning Manual
Functions:
Modem 5V Supply (1,2 & 3,4) – This output provides a regulated 5V supply with active current limiting
set at approximately 700mA. This supply output is NOT battery backed.
Isolated Shutdown Output (5,6) – These two pins provide an opto-isolated controller shutdown signal.
The + signal is the collector and the – signal is the emitter of the opto-transistor. The output is active
low (i.e. low impedance) when the controller is in the shutdown state. The maximum current that this
output can pass is 25mA and suitable external devices must be employed to ensure that this figure is
not exceeded otherwise damage to the ST950 board will occur.
Digital External Supply Monitor (7,8) – For future use.
Analog External Supply Monitor (9,10) – For future use.
Bottom connector – Serial port for future use.
The double stacked connectors are numbered as shown in
below:
Figure 20. Double Stacked Connector Pin Numbering
3.9.5. Parts
ST950 Plus+ CPU Card (128M RAM) 667/1/46010/101
3.10. Heart of the Controller
The heart of the Controller uses an SD card to provide transferable storage for controller firmware,
configurations and logs.
Important:
The formatting of the card is such that it is not readable in a PC. There are no user files
accessible on the card.
Should it need to be removed or replaced the following procedure should be followed:
Power down the controller.
Unplug connectors and slide the CPU card free of the rack so that the top edge of the card can be
accessed.
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