Juniper Networks G10 CMTS manual Terminal block. The guard will be reinstalled in step

DC Power

Connect to Power Sources

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Each DC power transition module in the G10 CMTS chassis contains a terminal block for			•
connecting to a DC power source (see Figure 39 on page 122). Unlike the AC configuration,			•
the DC power transition modules do not operate independently. Each DC power transition			•
module supports the power supplies in both domains of the chassis.			•
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		You must supply power from different circuits to domain A	•
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		and domain B for power redundancy protection.	•
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To connect the DC power transition modules to their power sources, follow this procedure:			•
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1.	The G10 CMTS is shipped with ring lugs that are used to connect the DC power cord to		•
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	the DC power transition module terminal block. You must crimp these ring lugs to the
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	negative (–) and positive (+) wires of the DC power cord in order to properly connect to
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	the DC power transition module.
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		We recommend you use 10–12 AWG wires for your power	•
		feeds unless your local safety code states otherwise.	•
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2.	Remove the plastic guard over the DC terminal block by loosening the two fastening		•
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	screws until the guard can be removed by sliding it upward and over the two screws (see
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	Figure 39 on page 122; the guard in this illustration is transparent so that you can see
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	the terminal block). The guard will be reinstalled in step 7.
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3.	Remove the screw from the negative (–) terminal on the terminal block of the DC power		•
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	transition module. Insert the screw through the ring lug of the power cord that will be
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	attached to the negative (–) terminal of the DC power source and tighten the screw into
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	the negative (–) terminal on the terminal block. Apply 20 in-lb of torque to the screw.
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4.	Remove the screw from the positive (+) terminal on the terminal block of the DC power		•
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	transition module. Insert the screw through the ring lug of the power cord that will be
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	attached to the positive (+) terminal of the DC power source and tighten the screw into
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	the positive (+) terminal on the terminal block. Apply 20 in-lb of torque to the screw.
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5.	Connect the other end of the power cord connected to the negative (–) terminal on the		•
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	terminal block of the DC power transition module to the negative (–) terminal of the DC
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	power source in accordance with the manufacturer’s specifications.
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6.	Connect the other end of the power cord connected to the positive (+) terminal on the		•
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	terminal block of the DC power transition module to the positive (+) terminal of the DC
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	power source in accordance with the manufacturer’s specifications.
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7.	Replace the plastic guard over the two fastening screws and slide the guard down.		•
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	Tighten the screws using a torque of 2.5 in-lb.
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Install the CMTS 121