CMU-212 Cabinet Monitor Unit
Operations Manual
Eberle Design Inc.
Page 19
4.1.10 SB #1 ERROR INDICATOR
A red SB #1 ERROR indicator will illuminate when the CMU-212 is in FSA as a result of a
Serial Bus #1 fault. See section 2.3.1. The SB #1 ERROR indicator will pulse at a 2 Hz rate
when the SERIAL BUS #1 DISABLE input is True. See section 3.7.
4.1.11 SB #3 ERROR INDICATOR
A red SB #3 ERROR indicator will illuminate when the CMU-212 is in FSA as a result of a
Serial Bus #3 fault. See section 2.3.2.
4.1.12 DIAGNOSTIC INDICATOR
A red DIAGNOSTIC indicator will illuminate when the CMU-212 is in FSA as a result of a
Diagnostic fault. See section 2.14.
The DIAGNOSTIC indicator will flash at a 4 Hz rate if the Datakey is not present and a FSA
state does not exist. See section 2.14.3.
4.1.13 SB #1 RX INDICATOR
A yellow SB #1 RX indicator will pulse On each time the CMU-212 correctly receives a
frame on Serial Bus #1.
4.1.14 SB #3 RX INDICATOR
A yellow SB #3 RX indicator will pulse On each time the CMU-212 correctly receives a
frame on Serial Bus #3.
4.2 TERMINAL PORT
An EIA-232-E Data Terminal Equipment (DTE) interface is provided for interconnecting to a
personal computer using the EDI ECcom Signal Monitor Communications software
package. See the Eberle Design
ECcom Operations Manual
for further details. This port
is electrically isolated from the main CMU-212 power supply and AC+ Neutral.
4.3 RESET BUTTON
Depressing the RESET button resets the CMU-212 from the FSA condition after it has
been triggered by a fault. When the RESET button is depressed all front panel indicators
will be illuminated for 500 msec and the OUTPUT relay energized. Continuously
depressing the Reset button will not affect CMU-212 operation.
4.4 DATAKEY
The front panel mounted Keycepticle
tm
is used to receive the Datakey serial memory
device. To install a Datakey, insert the key and rotate clockwise 90 degrees to the vertical
orientation. When a Datakey is installed while the power is applied to the CMU-212, the
CMU-212 will load and verify the parameters and begin using the new configuration
immediately.
When a Datakey is removed while the power is applied to the CMU-212, the CMU-212 will
continue to use the parameters from the removed Datakey until Reset is applied, a new
Datakey is installed, or a power-up cycle occurs.
If a CMU-212 is Reset or powered-up with the Front Door in the open position without a
Datakey installed or with an invalid Datakey, the CMU-212 will assume a default Datakey
configuration according to the Datakey Protocol Version.
