The Yokogawa NFTA4S-00, also cataloged as the NFTA4S Pressure Clamp Terminal Block, operates as a dedicated hardware component for field wiring termination within STARDOM controller architectures.
Hardware Specifications
Parameter
Specification
Model
NFTA4S-00
Brand
Yokogawa
Origin
Japan
Weight
0.50 lbs
Dimensions
Standard STARDOM terminal block form factor
Operating Temp
0 to 55 deg C
Power Consumption
Passive mechanical termination (0 W)
Termination Type
Pressure clamp screw terminals
Target Module Integration
Dedicated for 16-channel analog I/O modules
4-20 mA HART Loop Protocol & Galvanic Isolation
The terminal block maintains individual wiring isolation paths between field instrumentation and control electronics, preventing inter-channel signal degradation across dense installations. Signal path paths shield analog loops from high-frequency interference, preserving raw signal accuracy for 4-20 mA HART loop protocol communications routed from 16-channel analog modules. Dedicated wiring points ensure low-resistance copper contacts to maintain precision and CJC signal stability across connected sensors.
Frequently Asked Questions
Q: Does the NFTA4S-00 pressure clamp terminal block require specialized crimp ferrules for field wire termination?
A: Wire ferrules with insulating collars are recommended for stranded conductors to ensure maximum pressure clamp retention and prevent stray wire strands from shorting adjacent terminals.
Q: Can the NFTA4S-00 terminal assembly be removed from the I/O module while field wiring remains intact?
A: Yes, the terminal block features a detachable design allowing technicians to disconnect field wiring assemblies without disturbing loop conductors during module replacement.
Field Installation Guidelines
Align the NFTA4S-00 terminal block with the mating connector of the target 16-channel analog module and press firmly until the locking tabs snap securely into place. Strip individual field conductors to specified lengths and insert them into the pressure clamp terminals, tightening the clamping screws to 0.5 Nm torque. Route signal cables away from high-voltage power lines, keeping a minimum distance of 150 mm. Connect cable shield drains directly to the system cabinet protective earth (PE) grounding bar using dedicated ground lugs.
