Tyco Electronics Galaxy SC Controller J85501F-1
7 - 41 Feature Descriptions Issue 13 February 2001
• Each module has a circuit card mounted on a plastic case. Each
module contains measuring channels used to measure the external
devices. Each module has a green LED which is illuminated under
normal operation, but rapidly blinks to indicate an error condition.
The LED blinks off for about 0.5 second each time the module is
accessed.
• Each module is individually factory calibrated. These data points
are stored in a nonvolatile memory. There are four data points per
channel and the Galaxy SC uses these values to calibrate the
measuring values from the channels.
• Each module has a serial number stored in nonvolatile memory at
manufacture. This number is composed of: character M or character
R, the year (00-99), the month (1-12), 4 characters indicating the
manufacturing location, and the 6 digit serial number.
• Each module has a user-selectable address via two (2) rotary
switches. This address shall be read and stored by the module
whenever it is powered up. Thus if you change the address setting,
the module power must be reset (by removing it from the base and
re-inserting it) for the new address to be recognized. The address
must be unique; address 0 is reserved for broadcasting. You must
not use this address. Any address duplication will result in a failure
for all involved modules.
• There are three system alarms/warnings associated with the remote
peripheral monitoring. They are RPM fail alarm (MDF1), measure
out of range alarm (MOR1), RPM type conflict warning (MTC1). It
takes only one of the 255 modules and their associated channels to
turn these events ON, but it takes all 255 modules and their
associated channels to turn these events OFF. The MDF1 and the
MTC1 originate from the module level; the MOR1 originates from
a channel level and propagates to the module and system level.
These alarms and warnings are logged in a history log as they occur
and retire. There are at most 256 entries in this log.
• Galaxy SC keeps basic statistics for these measuring channels. If
the module type is changed, then the statistics for the associated
channels are reset and re-started. For some channels, if the
configuration attributes such as offset or scale factor are changed,
then the statistics feature is reset and re-started. Any of the
measuring channels can be configured for Trend statistics or Busy
Hour statistics.
• The Remote Peripheral Monitoring network interface board is an
optional board, so there is a small chance that the board may be
inserted or removed from the system while it is in service. If the