Rockwell Automation Publication 1444-UM001D-EN-P - June 2018 195
Configure the Tachometer Expansion Module Chapter 5
Table 41 - Tachometer
Parameter Values Comments
Transducer Type Select the type of speed sensor that is connected to the input
channel of the tachometer signal conditioner.
Transducer Power Select the power requirement for the connected sensor.
Set to “Off” if the sensor is self-powered, such as a Magnetic
Pickup, or if it is powered from a separate source, including a
barrier or isolator.
Auto Trigger Checked (1)
Unchecked (0)
Auto Trigger is not available for Series A tachometer signal conditioner
expansion module hardware. Hardware series is specified in Module
Definition.
If a series A module is installed, but identified as a series B module, and
auto trigger is enabled in configuration, the tachometer module:
• Defaults to manual mode
• Indicates non-configured status (also see Status Page)
• Indicates failed communications status (Expansion bus or module
fault status)
• Indicates overall expansion module fail status (Exp Module
Summary status)
When checked, the tachometer signal conditioner
automatically determines the trigger threshold. The function
behavior, dependent on transducer type, is as follows:
When the Transducer Type is Eddy Current Probe System, Auto
trigger requires a signal pulse level of not less than 2.0 volts
peak to peak.
Sensor Type Value
Off 0
TTL Signal 1
NPN Proximity Switch 2
PNP Proximity Switch 3
Eddy Current Probe System 4
Self-Generating Magnetic Pickup 5
Transducer Power Value
Off 0
+24V DC 1
-24V DC 2
Sensor Type Behavior
Off —
TTL Signal Fixed trigger
level
NPN Proximity Switch
PNP Proximity Switch
Eddy Current Probe System Trigger level
that is
continuously
adjusted
Self-Generating Magnetic Pickup Fixed level
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