Meridian America 21, 51, 61, 71 External DC Power equipment components

Engineering and configuration guidelines 61
- Common/Peripheral Equipment Module (NT8DllDC )
- Remote Peripheral Equipment Module (NT8D47DC)
Ringing Generator DC (NT7D03AA)
The AC Ringing Generator DC operates from a nominal .48 V dc input and
provides selectable AC ringing voltage outputs superimposed on -48 V dc.
The frequency and voltage options are 20/25/50 Hz and 70/80/86 V ac. It also
supplies -150 V dc message waiting lamp 50012500 set applications. The
Ringing Generator mounts in the PE modules to the right of the Peripheral
Equipment Power Supply.
Configuration guidelines One Ringing Generator DC is used in each of the
following, when these DC Modules support 500- or 2500~type analog sets:
- Intelligent Peripheral Equipment Module (NT8D37DC)
- Peripheral Equipment Module (NT8D13DC)
.
Pedestal (NT7DOSAA)
The Pedestal supports the column of equipment modules, and houses the
Power Distribution Unit, the Blower Unit, and a reusable dust filter.
The Field Wiring Terminal Block is mounted in the bottom of the Pedestal.
Configuration guidelines One per column in DC systems
Power Distribution Unit (Nl7DlOAA)
The DC Power Distribution Unit (PDU) distributes power to the entire
column. It is located in the rear of the pedestal. It houses five circuit breakers
(one for each module and one for the Blower Unit) and the System Monitor.
Configuration guidelines One per pedestal/column in DC systems
Module Power Distribution Unit
Not applicable to DC systems.
External DC Power equipment components
The following components are required to configure DC powered system.
Power engineering 553-3001-l 52