Cisco 3845 Quick Start Guide - Page 19

Step 5 Connect the wires to the terminal block, starting with the safety ground wire. Connect each wire to the appropriate terminal as shown in Figure 12. Tighten the terminal screws to 10.0 ± 0.5 in-lb (1.1 ± 0.05 N-m). Warning The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated. The proper wiring sequence is ground to ground, positive to positive, and negative to negative. The ground wire should always be connected first and disconnected last. Statement 239 Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122 Caution Do not overtorque the terminal block screws. The recommended torque is 10.0 ± 0.5 in-lb (1.1 ± 0.05 N-m). Figure 12 DC Power Connections for Cisco 3825 Routers (Typical) -DC, input A Return, input A Safety ground Return, input B -DC, input B Return, input A +DC, input A Safety ground +DC, input B Return, input B A+ +B Negative DC input Terminal block A+ +B Positive DC input Terminal block 111752 Figure 13 DC Power Connections for Cisco 3845 Routers Negative DC input 24-60 19-8 A Positive DC input 24-60 19-8 A 117981 Safety ground Negative polarity input 0V (return) Safety ground 0V (return) Positive polarity input Step 6 Install the plastic safety covers over the terminals. (See Figure 14 or Figure 15.) 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. Statement 117 Step 7 Step 8 Step 9 Organize and secure the wires using cable ties as shown in Figure 14 or Figure 15. Make sure that the wires do not project above or below the front panel of the router. If a second power supply is installed and intended for use, repeat Step 1 through Step 7 for the second power supply. Turn on power to the DC circuit. Be sure to remove tape used to secure the circuit-breaker switch in the OFF position. 19