Alcatel-Lucent 1675 LambdaUnite Installation And System Turn-Up Manual page 222

System cabling and final assembly
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Miscellaneous Discrete Inputs/Outputs (MDIs/MDOs)
Overview
Miscellaneous Discrete Inputs and Outputs allow the network provider to use the system
to monitor and control other equipment co-located with the system. For example, an MDI
can be connected to monitor a temperature sensor, and an MDO can be connected to
control a fan or generator.
The system provides 8 MDIs and 8 MDOs. All MDIs/MDOs can be configured by the
user. This means that the user can determine which entities shall be wired to the
MDIs/MDOs.
The following should be observed in general:
• The voltage on the individual MDIs should be positive with respect to the common
pin (= pin 5) to operate properly.
• The common pin should be connected to a voltage in the range of –40 V ... –72 V
(with respect to G D). Each MDI will be activated when it is connected to G D.
Cable data
Length of pre-fabricated cables, 13 × 2 × 0.5 mm / AWG 26 (shielded) + overall screen:
• 10 m [32.808 ft] MDI/MDO cable — CC109155481
• 25 m [82.021 ft] MDI/MDO cable — CC109155499
• 50 m [164.042 ft] MDI/MDO cable — CC109155507
• 75 m [246.063 ft] MDI/MDO cable — CC109164202
• 100 m [328.084 ft] MDI/MDO cable — CC109164210.
Connector data
The MDI/MDO cables have a 25-pin SUB-D connector (male).
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4-52 Alcatel-Lucent – Internal
Proprietary – Use pursuant to Company instruction
External cable installation
Miscellaneous Discrete Inputs/Outputs (MDIs/MDOs)
365-374-198R10.5.4
Issue 1 July 2009