1-12
Cisco MWR 1941-DC-A Mobile Wireless Edge Router Hardware Installation Guide
OL-7872-04
Chapter 1 Product Overview
Compact Flash Memory
Compact Flash Memory
One internal 128MB fixed compact flash (CF) device is used on the Cisco MWR 1941-DC-A router.
This CF device is not field upgradeable, it is only installed at the factory. This CF device is required for
the Cisco MWR 1941-DC-A router to function because the Cisco IOS image and troubleshooting logs
reside on the flash memory.
Power Supply
The Cisco MWR 1941-DC-A router is equipped with a +27/-48 VDC (±20 to 60 VDC supply tolerance)
universal power supply.
Safety Precautions
Observe the following general safety precautions and recommendations in planning the source power
requirements for the Cisco MWR 1941-DC-A router (for additional safety information, see the
“Safety
Guidelines” section on page 2-2
):
•
Check the power at your site before router installation (and periodically after installation) to ensure
clean power is being received.
•
Always disconnect the power source and unplug the power cable before working on the router.
•
Install proper grounding for the site to avoid damage from lightning and power surges.
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables.
Statement 1021
Table 1-4
lists DC power supply specifications for the Cisco MWR 1941-DC-A router.
Table 1-4
Cisco MWR 1941-DC-A Router Power Supply Specifications
Specification
+27/-48 VDC
Input voltage, DC power supply
Maximum input current
Note
If the input voltage drops
below 18.5 VDC, the router
will go into shut down
mode.
+27/-48 VDC (±20 to 60 VDC
supply tolerance) universal power
supply
3.5 A
Wire gauge for DC input power
connections
18 AWG
Power dissipation
70 W (maximum), 35 W (typical)
