Installing Power and Ground for the 9101 Connect to Power Source (Single or Dual)
Telesyn 9100 Installation Guide (Installation of Allied Telesyn 9100)
1-221.8.4 Connect to Power Source (Single or Dual)
The user can decide to connect the A and B feeds to a single power source or a different power source.
If the customer chooses to use a single power source, jumper the -48 A and -48 B feeds together. Allied Telesyn
recommends that separate cables be run from the single power source and return to each of the specified lugs on
the PEM plug.
With a dual power source, if one power source fails, the shelf can continue to operate.
The different steps are included in the procedure below:
1. If connection to a dual power source, follow these steps.
1. Connect -48 A to a -48 VDC source.
2. Connect -48 B to a different -48 VDC source.
2. If connecting to a single power source, follow these steps:
1. Connect -48 A to a -48 VDC source.
2. Connect -48 B to the same -48 VDC source.
3. Connect the ground wire to the frame grounding point.
4. Connect the RTN to a common return, or split the wire from the RTN after some distance and then use a butt
splice, wire connector, T-splice, etc. to split it into two wires. Refer to the Note in 1.8.2.
5. Plug the 9101 PEM plug into its connector on the faceplate of the unit. As mentioned before, the PEM plug
will only fit one way. Tabs on the front of the PEM plug prevent it from being inserted incorrectly.
1.8.5 Apply and Check Power (DC Power Supply)
1. Ensure that fuses A and B have been removed from the 9100 PEM.
2. Turn ON the DC power source.
3. Measure the voltage between -48 A and RTN A screws on the power connector. -48A should be negative
with respect to RTN.
4. Measure the voltage between -48 B and RTN B screws on the power connector. -48 B should be negative
with respect to RTN.
5. Measure -48 A to GND. Should be -48VDC negative with respect to GND.
6. Insert Fuse A, and then Fuse B into the 9100 PEM. Power is now being applied to the 9100 unit and compo-
nents.
7. The fans will start to operate.
Note: Fan speed is self-regulating and will automatically adjust as necessary.
8. Remove Fuse A and B to disconnect power from the 9101. The card modules are installed next.