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100-317-102-04, Issue 4
b
Wire-wrap the DSX/G.703 and HDSL inputs to the appropriate
individual card slots. Pin assignments are listed in
Assignments" on page
4
Connect the power and optional fan inputs to TB1 as shown in
Slots 1 through 14 on the HMS-317 (slots 1 through 11 on the HMS-318)
are powered by the -48VA bus, and slots 15 through 28 on the HMS-317
(slots 12 through 22 on the HMS-318) are powered by the -48VB bus.
The two GND terminals are tied together. The HMU-319 is diode-OR'ed
to both power busses, to guard against power failure in the event that one
power supply is lost. This feature requires the 2 ground terminals to be
tied together on the HMU card.
To avoid voltage differences from building up between the shelf
GND bus and the ground pins of the management terminal that
connects to the RS-232 ports, connect the shelf Ground (GND)
pins and the terminal ground bus to the TB1 FG pin.
The fan terminal of TB1 provides access to the Normal Opening
(NO), Form A fan relay contact located on the HMU-319
management unit. A temperature monitor activates this fan relay
whenever the shelf temperature goes above 45 °C (±1 °C) and
deactivates the relay when the temperature drops below 35 °C
(±1 °C). If the temperature goes above 77 °C (±1 °C) a critical alarm
is also generated. The critical alarm resets when the temperature
drops below 40 °C (±1 °C)
HMS-317 List 2 and HMS-318 List 2
11.
.
Figure 6. Terminal Strip TB1
July 26, 1999
Installation
"Signal and Pin
Figure
6.
9
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