The CSI 9420 and all other wireless devices should be installed only after the 1420 Wireless
Gateway has been installed and is functioning properly.
Powering the CSI 9420
Remove the rear cover of the device to access the power connections. For the battery
powered version, simply plug in the power module. For the externally powered version,
connect a 10...28V DC (24V nominal) power supply to the bottom two screw terminals on
the right (see Figure 3). Pull the wiring through the threaded conduit entry. When selecting
the power supply, note that each CSI 9420 has a peak current draw of 40 mA when awake
and powering sensors.
NOTE:
Wireless devices should be powered up in order of proximity to the 1420 Wireless
Gateway, beginning with the closest device to the 1420. This will result in a simpler
and faster network installation.
GENERAL SENSOR HANDLING INSTRUCTIONS
The CSI 9420 utilizes special low-power sensors available from Emerson. Each sensor
requires a standard 1/4” - 28 mounting location. Refer to the User’s Manual for detailed
sensor mounting instructions. Sensor mounting instructions and practices are also available
in a separate Sensor Installation Guide on the CD packaged with this device and at
www.mhm.assetweb.com.
To maintain mechanical isolation of the sensor, a Remote Mount configuration is required,
as illustrated in Figure 2. In this configuration, the sensor is mounted separately from the
CSI 9420 housing, then connected to the CSI 9420. Although not required for all
installations, it is common to run the cable from the sensor to the housing through conduit.
NOTE:
The word “sensor” applies to both an accelerometer and an accelerometer with
embedded temperature. The word “accelerometer” refers to a sensor that measures
only acceleration.
Remote Mount
1. Install sensor or accelerometers according to standard sensor installation practices. Be
sure to use thread sealant on all connections.
2. Run wiring (and conduit if necessary) from the sensor to the CSI 9420.
3. Pull the wiring through the threaded conduit entry of the CSI 9420. If not using conduit,
an appropriate grommet or cable-gland should be used to provide both strain relief for
the cable and environmental isolation for the CSI 9420.
4. Attach the sensor wiring to the terminals as indicated in tables 1-3.
5. Connect the power pack module or external 24V DC power supply.
6. Close the housing cover and tighten to safety specification. Always ensure a proper seal
by installing the electronics housing covers so that metal touches metal, but do not over
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