Connect Power and Ground Installing Power and Ground for the 9101
1-19
Telesyn 9100 Installation Guide (Installation of Allied Telesyn 9100)
1.8.2 Connect Power and Ground
The Allied Telesyn 9101 is shipped with a power entry module plug. The user connects power and ground to this
plug, plugs it into the 9101 power entry module (PEM), then turns on office power which applies power to the
plug. The user then inserts the plug into the 9101 PEM. Finally, the user inserts fuses A and B to power the unit.
The following text and diagrams describe how to wire the 9100 for power and ground.
Slots for Fuse A and Fuse B are located above the plug. Notice the connections for -48 A, -48 B, ground , and
RTN. The PEM plug will be inserted into this connector. See Figure 1-10.
Note: To provide redundancy for the RTN, the user can to insert one wire into the RTN connector
position, and then after some distance, use a butt splice, wire connector, T-splice, etc. to split it
into two wires. This configures a wire to the A feed and a wire to the B feed and creates
redundancy.
The separate protective earthing terminal provided on this product shall be permanently connected to earth.
Before connecting any power (or grounding) cable, ensure the following:
1. Connect to a reliably grounded 48VDC SELV (Safety Extra Low Voltage)
source.
(SELV - UL60950 - A circuit designed so that its voltages do not exceed a normal
and fault value of 42.4 Vpeak or 60 VDC.)
2. The branch circuit overcurrent protection must be rated 15A.
3. A readily accessible disconnect device that is suitably approved and rated shall be
incorporated in the field wiring.
4. The customer-provided power (-48VDC) is off (visibly disconnected) and the
Allied Telesyn 9100 fuses are removed.
5. Use 14 AWG copper conductors.
6. Earth grounding conductors must have green/yellow insulation.