vol.245 June 2021
![](/eu-en/sites/components.omron.com.eu/files/2022-07/onboard_245_2_01.png)
By identifying operation as "normal" or "abnormal" with a single switch, it is useful for self-diagnosis and also remote maintenance.
Microswitch with built-in resistor D2AW-R
Launched in June 2021
Applicable to:
![Reduction of downtime through fault diagnosis (Machine tools, mounters, robots)](/eu-en/sites/components.omron.com.eu/files/2022-07/onboard_245_2_02_en.png)
![Detection of intentional destruction (Vending machines, security equipment, smart meters)](/eu-en/sites/components.omron.com.eu/files/2022-07/onboard_245_2_03_en.png)
![Here's the trick!](/eu-en/sites/components.omron.com.eu/files/2022-07/icon_flag02_en.png)
D2AW-R Detecting 4 states
![{Voltage output of D2AW-R (with built-in resistor): Four types of outputs, "Vc c, V1, V2, 0V," can be used to identify "(4) short-circuit, (1) switch ON, (2) switch OFF, (3) wire breakage} {Voltage output of D2AW (Standard Product): There are only two outputs, "Vc c and 0 V," thus "(1) switch ON and (4) short-circuit" and "(2) switch OFF and (3) disconnection" cannot be identified.}](/eu-en/sites/components.omron.com.eu/files/2022-07/onboard_245_2_04_en.png)
![Standard operation and Abnormal operation](/eu-en/sites/components.omron.com.eu/files/2022-07/onboard_245_2_05_en.png)
* Contents as of May 2021.
In the interest of product improvement, specifications are subject to change without notice