Configured for analog current signal processing in Harmony Block I/O platforms, the ABB PHBAIN1200C100 (AIN120 Analog Input Base) provides direct physical and electrical execution.

Ordering Code & Nomenclature Matrix

• PHBAIN1200C100: Commercial order part number designated for the base module sub-assembly.
• AIN120: Functional base unit identifier specifying the 4-20 mA current input board layout.

Hardware Specifications

Deterministic Backplane & Bus Performance

The base unit integrates passive signal routing structures configured to sustain backplane bus communication velocity across system networks. Precision internal 250 OHM shunt resistors convert 4-20 mA loops into stable digitizing potentials, supporting high I/O density scaling inside control cabinets while ensuring complete firmware flash compatibility with upstream processors.

Package Contents

• 1 x ABB PHBAIN1200C100 AIN120 Input Base Unit

Cabinet Mounting and Field Connection Rules

• Mechanical Installation: Secure the base chassis directly to cabinet mounting plates using standard hardware, maintaining adequate spacing for thermal dissipation.
• Terminal Routing: Wire 4-20 mA field loops directly into designated screw terminals, respecting polarity constraints across all active loops.
• Shield Grounding: Terminate incoming signal cable shields at the primary cabinet ground bus bar to optimize common mode noise rejection.

Frequently Asked Questions

• What internal supply voltage is required by the PHBAIN1200C100 base?

  The base unit operates directly from an internal +5 VDC system power rail, drawing approximately 200 mA under normal load.

• How does the unit detect an open loop condition on a 4-20 mA channel?

  An open-circuit state is registered whenever the loop input current drops below the 1.2 mA threshold limit.

• What is the input impedance rating for current loop signals?

  Each current input path maintains a precision internal termination impedance of 250 OHM with a tolerance of +/-0.1 %.

• What maximum over-range value can the analog input handle?

  The analog circuit digitizes inputs up to an extended measurement limit of 22 mA without signal clipping.

• What common mode noise suppression capability does the hardware provide?

  The differential input topology achieves a Common Mode Rejection Ratio (CMRR) of 120 dB at 50 Hz up to 250 VAC.

• Can the active electronics module be removed while the base is energized?

  Yes, the base unit supports hot-swap replacement of mating processing modules without disconnecting field wiring terminals.

• What accuracy level is maintained across the analog measurement span?

  The input conversion hardware maintains overall analog measurement accuracy within +/-0.1 % of the full calibrated span.

• How does ambient temperature affect base installation inside subracks?

  Ensure continuous cabinet airflow to maintain ambient rack air surrounding the base board between 0 and +70 deg C.