Specification of YOKOGAWA AAP135-S50 S2
Item | Specidication |
Manufacuturer | YOKOGAWA |
Product No. | AAP135-S50 S2 |
Product Type | Pulse Input Module |
Number of Channels | 8 isolated input channels. |
Input Frequency Range | 0 to 10 kHz |
Input Pulse Width | 10 µs |
Counting Accuracy | ±0.1% of full scale |
Power Consumption | Approximately 5 W. |
Humidity | 5% to 95% RH (non-condensing). |
Operating Temperature | 0∘C to +50∘C |
Storage Temperature | −20∘C to +60∘C. |
Features of YOKOGAWA AAP135-S50 S2
FEATURE |
High Frequency Counting: The module supports an input frequency range typically from 0 up to 10 kHz (some variants might be 6 kHz), enabling it to accurately capture high-speed pulse trains from instruments like high-resolution flow meters or speed sensors. Isolated Channels: Each input channel is isolated from other channels and from the system itself. This isolation significantly enhances system reliability by preventing electrical noise, ground loops, or faults on one channel from affecting other channels or the core control system. Selectable Pulse Width Filters: The module often includes selectable pulse width filters to eliminate chattering noise from mechanical contacts, ensuring accurate pulse counting and preventing false readings. Integration with Yokogawa DCS: Designed specifically for Yokogawa's CENTUM VP and CENTUM CS 3000 systems, it integrates seamlessly into the FCU's I/O structure via ESB bus node units, ensuring consistent performance and simplified engineering. |
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FAQs of YOKOGAWA AAP135-S50 S2 And Images

What is its typical input frequency range?
It has an input frequency range of 0 to 10 kHz (some sources indicate up to 6 kHz for the AAP135-S00 S2, so it's best to confirm with the specific manual for the -S50 S2).
How many channels does it have?
The AAP135-S50 S2 features 8 isolated input channels.

What is the input impedance for different signal types?
For 24 VDC input, the current is typically 38 mA or less. For 5 VDC input, it's 10 mA or less. The specific input resistance will depend on the signal type and range.
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