Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Module Service:
This selection must be enable when the DACS module is used in an M-DACS. It allows SCB
communications between the DACS module and CM4 D/I-A.
Disable Left Module:
This feature is not used in an M-DACS.
Disable Right Module:
This feature is not used in an M-DACS.
Shelf Alert if Service Off:
This selection must be enable when the DACS module is used in an M-DACS. A shelf alert is
generated when the CM4 D/I-A can not communicate to the DACS module through the SCB.
Shelf Alert if Force Map:
The user may bypass the automatic selection of maps and manually force the DACS module to use a
particular map. Normally this is only done during system commissioning or troubleshooting. As such,
most users will desire the DACS module to be in alert (Configuration Alert) when a forced map is
selected, to do this, this function should be enabled. There are, however, some applications where the
DACS module will be in a forced map during normal operation. In these systems a constant alert
condition would be undesirable and this function should be disabled.
MAP Switch Criteria:
There are five types of Map Switch Criteria as follows: Loss of Frame, Receive Carrier Loss,
Unframed All Ones, PVC Rate Exceeded and Fast Loss of Frame. For example, if “Loss of Frame” is
enabled (checked), the DACS module will switch to an alternate map if there is a loss of frame. Any
combination of Map Switch Criteria selections can be enabled (checked) depending on your system
requirements. If “PVC Rate Exceeded” is enabled (checked) the user must also set the PVC Rate
located on the same page. This will allow all ports to switch into an alternate map if the selected PVC
Rate is exceeded.
When the system switches from the normal map (Map 0) to an alternate map (Map 1 to Map 7) it will
automatically switch back to the normal map when the system recovers. “Recovery Delay” is the
amount of time in seconds that will elapse before the system switches back to the normal map (Map 0).
The value of Recovery Delay can be set by the user in accordance with the system specifications.
Loss of Frame:
Enabling this will instruct the DACS module to consider the loss of frame condition when evaluating
which map to use. Note that other types of line faults may also cause a loss of frame.
Receive Carrier Loss:
Enabling this will instruct the DACS module to consider the loss of carrier condition when evaluating
which map to use.
M-DACS-T1 RFL Electronics Inc.
February 28, 2006 5-26 (973) 334-3100
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