Bailey 6639364G1 INFI 90 Termination Unit

The Bailey 6639364G1 INFI 90 Termination Unit is the Bailey NTAI06 Analog Input Termination Unit for the INFI 90 DCS, providing 16 configurable analog inputs in a 19-inch rack-mount module. Each channel is jumper-configurable for input type, including voltage or current signals, differential or single-ended voltage, 4–20 mA, or 3-wire RTD inputs, enabling a single termination unit to interface with a wide range of field devices. The unit includes RTDs for cold-junction compensation of thermocouple inputs and requires the enclosure cover to remain in place when using the built-in cold junction reference, ensuring stable measurement accuracy. Power is supplied from +24 V DC (P2), and the unit ships with factory-installed fuses F1–F16 (31.25 mA, 125 V); Rev A hardware (6639364A1) adds F17 (2 A, 250 V) while Rev B added filter capacitors.