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CRS-311 1:1 Redundancy Switch
Introduction
1.4
Summary of Specifications
1.4.1 CRS-311 Specifications
Feature
Switch Type
Compatible Modems
Operating Modes
Switching Conditions
Switching Time
IF Switching
Temperature
Humidity
Environmental
Redundant Modem
Signal Source
Front Panel
Audible Alarm
Common faults
AC Prime Power
DC Power
Dimensional Envelope
Weight
CE Mark
Specification
• 1:1 Redundancy Switch system
• Bridging architecture
• C161 control processor
• SLM-5650
• SLM-5650A
• CDM-Qx
• CDM-QxL
• Fully automatic or manual
• Force Traffic Modem to Redundant Modem
• Programmable holdoff-to-backup and holdoff-to-restore times (from 1 to 99 seconds)
Switch to Redundant Modem following a Unit fault, Tx traffic fault, or Rx traffic fault
6 seconds max. (Delay interval set to minimum, 1 sec)
CRS-311 with CRS-281 IF Module: all modems outputs ON all the time
• 0 to +50°C (32 to 122°F) Operating
• 50 to 100°C (122 to 212°F) Storage
95% at +50°C (122°F), Non-condensing
Operating temperature range 0
The traffic paths (bridge mode) (both Rx IF and Tx data)
• Vacuum Fluorescent Display (VFD): 2 lines @ 24 characters/line
• 6-button Keypad: ENTER, CLEAR, (4X) navigation
• LED system status display showing:
o Operational status indicators: Unit, Remote, Stored Event
o Online status indicators: Traffic or Redundant Modem
Programmable to activate following various changes of state
Dry relay contacts
Two independent inputs: 90 to 264 VAC, 50/60 Hz, at 25 Watts
Two independent inputs: -48 VDC, at 25 Watts
19W x 11.2D x 3.75H inch (2RU)
(48.26W x 28.4D x 8.9H cm)
~ 10 lbs (~ 9.07kg)
EMC and Safety
1–16
°
°
°
°
to 50
C (32
to 122
F)
Revision 7
MN/CRS311.IOM
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