The Yokogawa ATA4S-00 S2, also cataloged as the ATA4S Terminal Block, operates as a dedicated hardware component for field signal termination within Yokogawa CENTUM VP control systems.
Hardware Specifications
Parameter
Specification
Model
ATA4S-00
Suffix/Revision
S2
Brand
Yokogawa
Origin
Japan / Singapore
Weight
0.5 kg
Dimensions
100 mm x 50 mm x 30 mm
Operating Temp
-20 to +70 deg C
Power Consumption
Passive (Powered via field loop / backplane)
Channels
16 channels
Supported Signals
Analog and digital signals
Current Rating
10 A
Voltage Rating
24 V DC
Connection Type
Pressure clamp
DCS Signal Integrity & Process Control Architecture
4-20 mA HART Loop Protocol Pass-Through: Maintains transparent bidirectional communication for super-imposed digital HART signals across analog I/O terminations without insertion loss or signal attenuation.
Channel-to-Channel Isolation: Prevents ground loops and electrical interference between field devices and I/O cards across all 16 channels.
Cold Junction Compensation (CJC) Integration: Works in conjunction with thermocouple input processing by maintaining uniform terminal block temperature gradients to prevent cold junction measurement errors.
Frequently Asked Questions
Q: Can wires be terminated into the pressure clamp terminals while the 24 V DC loop is actively energized?
A: Yes, but field wiring should be isolated prior to disconnection to prevent inductive spikes or accidental short-circuits across adjacent 24 V DC channels.
Q: Does the S2 revision alter the mechanical dimensions or rail footprint compared to base hardware?
A: No, the overall physical dimensions (100 mm x 50 mm x 30 mm) and mounting interface remain fully standard for direct replacement in field control station cabinets.
Field Installation Guidelines
Mount the ATA4S-00 S2 firmly to the cabinet DIN rail or module mounting plate. Strip signal conductor insulation to standard length (8 mm to 10 mm) without damaging wire strands. Insert stripped wire ends directly into the pressure clamp connectors until secured. Maintain physical separation between 24 V DC field wiring and high-voltage AC power lines to mitigate electromagnetic interference. Ground all cable shields at a single dedicated earth point in accordance with plant wiring standards.
