Allied Telesis 9400 iMAP - Manual (Page 20)

Connect Power. Install the Chassis
Telesyn x400 - Installation Guide (Installation of ATI 9400) 1-16
1.9 Connect Power.
1. Remove the plastic cover for the power and grounding terminals.
2. Connect the -48VDC power feeds and DC returns for A and B.
Note: The shelf can operate on one power feed (A or B). The customer can select to connect the A
and B feeds to different customer power sources, so that if one power source goes down, the
shelf can continue to operate.
As noted above, the customer has the option of connecting to a single power source. The wiring configuration
for this option is detailed in the figure below. Note the dashed jumper connecting A and B power feeds.
Before connecting any power (or grounding) cable, ensure the follow-
ing:
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 20A
3.
A readily accessible disconnect device that is suitably approved and
rated shall be incorporated in the field wiring
4.
The customer-provided power (-48 VDC) is off (visibly discon-
nected) and the ATI 9400 shelf circuit breakers are off (0).
5.
Use 12 AWG copper conductors.
If the customer utilizes a single power source, a Major alarm will be
raised in the 9400 system. To clear the alarm, jumper the 48A and 48B
feeds together as illustrated in Figure 1-12