AAV144-S50/A4S10

The Yokogawa AAV144-S50/A4S10 is a 16-channel isolated voltage input module for acquiring analog voltage signals in a Yokogawa control system. It accepts 1 to 5 V and -10 to +10 V input signals, with a 10 ms data update period. The module supports dual-redundant configuration and uses the /A4S10 option for an analog pressure clamp terminal block with surge absorber.

Input Channels and Signal Processing

The AAV144 receives voltage signals from field instruments and converts them into input data for the control system. All 16 channels are isolated from the system side. However, the available specifications do not establish isolation between individual input channels.

The module supports two input ranges:

• 1 to 5 V DC
• -10 to +10 V DC

The input range can be selected collectively for CH1 to CH16. Individual channel range selection is not specified. The allowable input voltage is +/-30 V, which should be distinguished from the normal measurement ranges.

Accuracy and Electrical Isolation

The specified accuracy is +/-4 mV for the 1 to 5 V range and +/-20 mV for the -10 to +10 V range. Input resistance is 1 MOhm when the module is powered on and 200 kOhm when powered off.

Input-to-system isolation withstands 1500 V AC for one minute under the specified test conditions. This isolation rating is relevant when checking electrical separation between field signal circuits and the control system. The rating should not be interpreted as a continuous operating voltage.

Terminal Block and Ordering Configuration

The /A4S10 option identifies a pressure clamp terminal block for analog signals with a surge absorber, model ATA4S-10. This distinguishes the configuration from /A4S00, which uses the ATA4S-00 terminal block without the specified surge absorber option.

The terminal connection options documented for the AAV144 include pressure clamp terminals, MIL connector cables and the dedicated KS1 cable. The selected connection method matters when checking the applicable isolation withstand voltage.

Technical Specifications

Parameter	Specification
Model	AAV144
Full Model	AAV144-S50/A4S10
Brand	Yokogawa
Product Type	Isolated Voltage Input Module
Number of Input Channels	16
Input Signal	1 to 5 V DC, -10 to +10 V DC
Channel Isolation	Isolated between input and system
Allowable Input Voltage	+/-30 V
Isolation Withstand Voltage	1500 V AC for 1 minute
Input Resistance (Power ON)	1 MOhm
Input Resistance (Power OFF)	200 kOhm
Accuracy (1 to 5 V)	+/-4 mV
Accuracy (-10 to +10 V)	+/-20 mV
Data Update Period	10 ms
Temperature Drift (1 to 5 V)	+/-4 mV/10 deg C
Temperature Drift (-10 to +10 V)	+/-20 mV/10 deg C
Maximum Current Consumption	500 mA at 5 V DC
External Connection	Pressure clamp terminal, MIL connector cable, dedicated KS1 cable
Terminal Block Option	ATA4S-10
Weight	0.20 kg
Dimensions	130 x 32.8 x 107.5 mm

Model and Suffix Identification

The ordering code identifies the module type and its hardware configuration:

Code	Description
AAV144	16-channel isolated analog voltage input module
-S	Standard type
5	No explosion protection
0	Basic type
/A4S10	Analog pressure clamp terminal block with surge absorber
ATA4S-10	Terminal block model associated with /A4S10

The /A4S10 option is different from /A4S00, which specifies the ATA4S-00 terminal block without the surge absorber option. The terminal block configuration should therefore be checked when matching replacement hardware and field wiring.

Field Connection Considerations

The module supports pressure clamp terminal connections, MIL connector cables and dedicated KS1 cables. The connection method affects the applicable electrical isolation rating.

When the dedicated cable is used, the isolation withstand voltage between the input signal and system is reduced to 500 V AC. For MIL connector cables, the withstand voltage depends on the electrical specifications of the selected cable. The 1500 V AC rating should therefore not be applied indiscriminately to every connection arrangement.

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Frequently Asked Questions

Q: Can the AAV144-S50/A4S10 operate in a dual-redundant configuration?

A: Yes. The AAV144 supports dual-redundant configuration. This allows the module to be used in a redundant FIO input arrangement, subject to the applicable system configuration requirements.

Q: Can the 16 input channels use different voltage ranges?

A: No individual channel selection is specified. The input signal range is configured collectively for CH1 to CH16, so the channels share the selected input range.

Q: Does the /A4S10 option include a surge absorber?

A: Yes. It specifies the ATA4S-10 analog pressure clamp terminal block with surge absorber. It should not be confused with the /A4S00 configuration using ATA4S-00.

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