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Installing Power Supplies in Cisco 3631 Routers
78-13818-03
Electrical Connections for Cisco 3631 Routers
Figure 11 and Figure 12 show the router DC-input power supply terminal block.
Figure 11 DC Power Connections for -48V DC Input
Figure 12 DC Power Connections for +48V DC Input
Step 1 Install the plastic covers over the terminals.
Warning
The safety cover is an integral part of the product. Do not operate the unit without the safety cover
installed. Operating the unit without the cover in place will invalidate the safety approvals and
pose a risk of fire and electrical hazards. To see translations of the warnings that appear in this
publication, refer to the Regulatory Compliance and Safety Information document that
accompanied this device.
Table 1 DC Wiring Requirements for Cisco 3631 Routers
Installed Power Supply DC Input Wire Size Ring Terminal (Lug) Overcurrent Protection
Nominal 48 VDC
1
Identification is stamped in
sheet metal near the DC wire
terminals:
1. The input voltage tolerance limits for nominal 48V power supplies are 38 and 72 VDC.
48 - 60V, 4A AWG 18 (1.0 mm
2
),
minimum
Molex part number
19193-0009, or equivalent
15A maximum
INPUT -48 TO
-60V 4 A
62557
Safety ground
Terminal strip
A
+
B
+
Return, input A
-48V, input A
Return, input B
-48V, input B
62558
Safety ground
Terminal strip
A
+
B
+
+48V, input A
Return, input A
+48V, input B
Return, input B