A2SDV105-S000

The Yokogawa A2SDV105-S000 is a digital input adaptor designed to interface 24 V DC voltage signals and dry contact signals with a Yokogawa I/O system. It provides input signal conditioning and electrical isolation between the input signal and system. The adaptor supports both voltage and contact input formats and is mounted on the A2BN3D adaptor base plate.

Input Signal Characteristics

The A2SDV105 supports two input formats: 24 V DC voltage input and dry contact input. For voltage signals, the rated input voltage is 24 V DC, with an ON threshold of 18 to 26.4 V DC and an OFF threshold of 5.0 V DC or lower.

For dry contact signals, the adaptor uses a 24 V DC field voltage. Contact resistance and current capacity determine whether the input is recognized correctly.

• Voltage input current: 6 mA +/- 1.2 mA at rated input voltage
• Contact input ON resistance: 1 kOhm or lower
• Contact input OFF resistance: 50 kOhm or higher
• Contact input field voltage: 24 V DC +/- 2.4 V DC
• Contact input current capacity: 10 mA or higher
• Contact input current limitation: 20 mA or lower
• Maximum allowable input voltage: 30.0 V DC

Electrical Isolation and Withstanding Voltage

The adaptor provides electrical isolation between the input signal and the system, with a specified withstand voltage of 1500 V AC for 1 minute and 42 V DC. Isolation between I/O adaptors is specified at 500 V AC for 1 minute and 42 V DC.

These ratings define the specified electrical withstand conditions. They should be distinguished from the normal operating input voltage and should not be interpreted as continuous operating voltage ratings.

Response Time and Power Consumption

The input response time is specified as 150 microseconds for the adaptor alone. When used in combination with an I/O module, the response time can be up to 22 ms. The actual system response therefore depends on the combined adaptor and I/O module configuration.

The A2SDV105 uses the 5 V DC internal power supply, with a maximum current consumption of 14 mA. The 24 V DC system power supply is specified as unused.

Technical Specifications

Parameter	Specification
Model	A2SDV105-S000
Brand	Yokogawa
Product Type	Digital Input Adaptor
Input Format	Voltage input and dry contact input
Rated Input Voltage	24 V DC
Input Current	6 mA +/- 1.2 mA at rated input voltage
Input ON Voltage	18 to 26.4 V DC
Input OFF Voltage	5.0 V DC or lower
Field Voltage Rating	24 V DC +/- 2.4 V DC (contact input)
Field Current Capacity	10 mA or higher (contact input)
Input ON Resistance	1 kOhm or lower (contact input)
Input OFF Resistance	50 kOhm or higher (contact input)
Maximum Allowable Input Voltage	30.0 V DC
Contact Input Current Limitation	20 mA or lower
Withstanding Voltage (Input Signal to System)	1500 V AC for 1 minute, 42 V DC
Withstanding Voltage (Between I/O Adaptors)	500 V AC for 1 minute, 42 V DC
Maximum Current Consumption	14 mA at 5 V DC internal power supply
24 V DC System Power Supply	Unused
Input Response Time	150 microseconds (adaptor alone); up to 22 ms with I/O module
Mounting	A2BN3D adaptor base plate
Weight	0.10 kg

Frequently Asked Questions

Q: Can the A2SDV105-S000 accept both voltage and dry contact inputs?

A: Yes. The adaptor supports 24 V DC voltage input and dry contact input. The electrical conditions differ between the two formats, particularly in terms of input thresholds, contact resistance and field voltage requirements.

Q: What is the difference between the standalone and combined input response times?

A: The standalone adaptor response time is specified as 150 microseconds. When combined with an I/O module, the response time can be up to 22 ms, reflecting the response characteristics of the combined configuration.

Q: Which base plate is specified for the A2SDV105-S000?

A: The specified mounting component is the Yokogawa A2BN3D base plate for adaptors. Confirm the installed I/O configuration before selecting replacement hardware.

---