The Yokogawa ASI133-H00, also cataloged as the ASI133 Analog Input Module, operates as a dedicated hardware component for 4-20 mA sensor signal acquisition within Yokogawa Field Integrated Operation (FIO) platforms.
Hardware Specifications
Parameter
Specification
Model
ASI133-H00
Brand
Yokogawa
Origin
Japan / Singapore
Weight
0.5 kg (1 lbs 0.0 oz)
Dimensions
3.8 cm x 12.7 cm x 15.2 cm (1.5" x 5.0" x 6.0")
Operating Temp
-20 to +60 deg C
Power Consumption
Standard backplane power allocation
Number of Channels
8 channels
Input Signal Type
Analog 4-20 mA
Galvanic Isolation
Isolated per channel
System Compatibility
Yokogawa FIO Series / CENTUM VP
Safety Certifications
IEC, ATEX for hazardous locations
DCS Process Control & Signal Integrity
4-20 mA HART Loop Protocol Execution: Accommodates high-accuracy analog current loop measurements from field pressure transducers, temperature transmitters, and flow meters.
Channel-to-Channel Electrical Isolation: Integrates individual channel isolation boundaries to prevent ground loops and eliminate noise coupling across adjacent sensor inputs.
Built-in Safety Barrier Integration: Features internal safety barriers to facilitate signal processing in classified hazardous areas under ATEX and IEC certifications.
Frequently Asked Questions
Q: Can the ASI133-H00 module be replaced under power without isolating the system backplane?
A: Yes, provided the local safety classification permits hot-swapping on the target FIO baseplate without compromising intrinsic safety constraints in active hazardous zones.
Q: What mechanism prevents field-side ground loops from affecting channel accuracy?
A: Channel-to-channel galvanic isolation isolates each of the 8 analog inputs from the system backplane logic and adjacent signal pathways.
Field Installation Guidelines
Mount the ASI133-H00 module firmly into its designated slot on the FIO system baseplate. Ensure the backplane lock engages securely to maintain electrical connection and ground continuity. Connect 4-20 mA signal wiring using recommended twisted shielded pairs, terminating the shield line at a single grounding point on the functional earth rail to preserve channel isolation and EMC performance. Verify ATEX/IEC explosion protection requirements prior to applying field power in hazardous locations.
