Frequently Asked Questions about the Tachometer

This is the method for setting up a connection with RP-721-120P/R to display the speed at ○○○．○ m/min.

The TM-2100 series (TM-2110, TM-2120, TM-2130, TM-2140) is set up by pulling out the internal components as shown in Figure 2. First, please complete the setup of the TM-2100 series. The connection of the power cable and signal lines should be done after the setup.

Signal cable connection with RP-721-120P/R

Connect using the cable model number: RP-004 type signal cable (5m). If a longer cable is needed, it can be custom-made to the specified length.

Figure 1

Settings of the TM-2100 series tachometer.

Refer to Figure 2 to set 1 to 4. I will provide additional explanations regarding the meaning of the settings. For detailed explanations of the functions, please refer to the instruction manual.
To display "000.0m/min" on the RP-721-120P/R + TM-2100 series, set the multiplier/exponent to "1.0000×1/10" and the decimal point to "○○○.○".

Figure 2

• AC-DC settings
  The signal from RP-721-120P/R will be a high-level square wave of 12V, so it is set to "DC". Generally, if the signal is a square wave, it is set to "DC", and if it is a sine wave, it is set to "AC".
• Voltage input, filter
  The signal from RP-721-120P is a square wave voltage, so set "Bit 1: OFF (voltage input side)" and "Bit 2: OFF (filter OFF)". Please set "Bits 3 and 4: OFF" (these are unused switches). For open collector signals, set "Bit 1: ON (contact input side)" and also set "Bit 2: OFF (no filter)". For contact input, set "Bit 1: ON (contact input side)" and to prevent contact chattering, set "Bit 2: ON (with filter)".
• How to find coefficients (multipliers × exponents)

  

  Set bit 3 to "Bit 3, 5: OFF" and "Bit 4: ON" (exponent = 1/10). Also, set "Bits 6, 7: OFF" and "Bit 8: ON" (decimal point ○○○.○). It is possible to set up to 3 decimal places. Set the rotary switch 4 to "10000" (multiplier = 1.0000).
• Wide Range
  When Bit 1: ON is set to 3, it becomes a wide range and the minimum measurement range starts from 0.1 Hz (0.01 m/min). During stop, it may take up to about 20 seconds of measurement time for the display to reach 0 in order to determine 0.1 Hz. When Bit 1: OFF is set, the minimum measurement range starts from 1 Hz (0.1 m/min) or more, and the display reaches 0 in about 1 second during stop. In this example, it is set to "Bit 1: ON". Also, please set "Bit 2: OFF" (this is an unused switch).