VME64x System Subrack 10 U
Product Definition
20836-220
www.schroff.biz
13
R1.0, November 19, 2007
2.9 Chassis Monitoring Module (CMM) -optional-
The Chassis Monitoring Module (CMM)
• monitors the four VME64x voltages
• can monitor two additional voltages with a range of ±24 V
DC
• can monitor up to seven NTC temperature sensors
• can communicate with the Fan Control Module (FCM)
• provides 16 digital inputs
• provides 10 digital outputs
The CMM is an optional assembly and not included with the subrack by default..
The CMM allows communication and remote monitoring via RS-232 or Ethernet
interface. The front panel provides a RJ45 connector (Ethernet) an a D-Sub9
connector (RS-232).
A user interface via HTML page is available.
The CMM can monitor the 4 VME64x voltages and two additional voltages (up
to ±24 V
DC
). The error status can be displayed by LEDs, through the RS-232
serial interface or via ethernet as a HTML page.
Up to 7 NTC temperature sensors can be connected to the CMM.Two alarm
thresholds between 20° C and 70° C can be set.
The CMM provides 16 digital inputs and 10 digital outputs for custom specific
applications. Four digital outputs are open collector outputs, isolated by opto-
couplers, six digital outputs are TTL-compatible non-isolated.
The CMM is connected to the FCM. The temperature values and the fan speeds
are transferred to the CMM.
For more information see the CMM’s User Manual, Order No.: 73972-084 and
at