PEACOCK COM5V2 Digital Comparator

Technical Dossier

Product Details And Specifications

PEACOCK COM Series: Comprehensive Module Range and Technical Overview

The PEACOCK COM series of digital comparators occupies a well-established position in precision measurement and industrial automation infrastructure across heavy industries including petrochemical plants, power generation facilities, and continuous-process manufacturing. The COM5V2 is a core model within this series, designed for high-accuracy digital comparison tasks where signal integrity and deterministic response times are non-negotiable. PEACOCK instruments of this class are deployed in environments requiring long-term dimensional stability monitoring, in-line quality verification, and closed-loop feedback to PLC or DCS controllers. The COM series interfaces with a broad range of LVDT, contact-type, and non-contact displacement sensors, making it a versatile backbone component in metrology-grade automation cells.

The Evolution of COM Series Architecture

PEACOCK's digital comparator product line evolved from analog relay-output gauging amplifiers of the 1970s into fully digital, multi-channel comparator systems by the 1990s. Early models in the COM1 and COM2 sub-series used discrete logic for threshold detection and offered only BCD parallel output. The COM3 and COM4 generations introduced RS-232 serial communication and expanded the number of tolerance bands from 2 to 5, enabling more granular pass/fail classification. The COM5 generation — of which the COM5V2 is the second revision — marked the transition to a microprocessor-controlled architecture with non-volatile parameter storage, improved noise immunity (conforming to IEC 61000-4 EMC standards), and optional BCD/RS-232/RS-485 output configurations. The V2 revision specifically addressed firmware stability issues present in the original COM5 and introduced an improved front-panel membrane keypad rated for higher actuation cycles. Compatibility between COM5 and COM5V2 is largely maintained at the sensor-input and output-signal level, though parameter backup files are not cross-compatible without conversion. Users migrating from COM3/COM4 to COM5V2 must account for differences in the tolerance-band configuration protocol and output timing.

COM Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified PEACOCK COM series product range. Each model is listed with its primary functional role within a measurement or automation system.

COM5V2: 5-band digital comparator, microprocessor-controlled, RS-232/BCD output, non-volatile storage.
COM5: Original 5-band digital comparator; predecessor to COM5V2; firmware v1.x.
COM4D: 4-band digital comparator with BCD parallel output and external zero-reset input.
COM4: Standard 4-band comparator; RS-232 serial output; 5-step tolerance classification.
COM3D: 3-band digital comparator with display; suited for manual gauging stations.
COM3: Entry-level 3-band comparator; BCD output; no display; panel-mount format.
COM2: Dual-band (Hi/Lo) comparator; relay output; analog input compatible.
COM1: Single-channel analog comparator; relay output; legacy gauging amplifier class.
EG-225: Digital gauge amplifier; compatible sensor input for COM5V2 systems; LVDT type.
EG-232: High-resolution gauge amplifier; 0.001 mm resolution; pairs with COM series comparators.
DG-5000: Digital gauge head; contact-type; direct input to COM5V2 via standard connector.
DG-5100: Extended-range digital gauge head; ±5 mm range; COM series compatible.
PC-10F: Foot-switch input unit; external trigger for COM5V2 measurement cycle initiation.
PC-20: Multi-point selector unit; expands COM5V2 to handle up to 8 measurement points sequentially.
DP-1VR: Remote display panel; mirrors COM5V2 front-panel readings at operator station distance.
SJ-5: Statistical output unit; collects COM5V2 BCD data for SPC analysis; RS-232 upstream.
AD-12S: Analog-to-digital signal converter; bridges legacy analog gauge heads to COM5V2 digital input.
COM5V2-R: Rack-mount variant of COM5V2; 19-inch EIA rack format; identical measurement engine.

Sourcing Hard-to-Find & Obsolete COM Series Parts

The PEACOCK COM series, particularly models predating the COM5 generation (COM1 through COM4D), has reached end-of-production status. OEM replacement stock is no longer available through standard distribution channels. DriveKNMS maintains a dedicated inventory of tested surplus and refurbished COM series units, including the COM5V2, COM4D, COM3D, and associated peripheral units such as the PC-20 and DP-1VR. For facilities operating legacy PEACOCK gauging systems that cannot be immediately replaced due to process qualification constraints or capital expenditure cycles, DriveKNMS provides lifecycle extension support including: unit-level repair and recalibration, firmware parameter backup and restoration, and cross-reference identification for sensor compatibility. All sourced units are subject to functional verification prior to shipment. Lead times for COM5V2 and COM4D units are typically 3–10 business days depending on current stock levels. Contact the procurement team with your full BOM or part number list for availability confirmation.

Quality Control for the COM Series Range

PEACOCK COM series comparators present specific verification challenges due to their mixed analog front-end and digital processing architecture. DriveKNMS applies a structured test protocol to all COM series units prior to dispatch. The analog input section is verified using calibrated LVDT signal sources at multiple amplitude and frequency points to confirm gain linearity and zero-offset stability. Tolerance band thresholds are programmed to factory-default values and verified against a traceable reference standard. The BCD parallel output is tested under load conditions using a dedicated output verification fixture. RS-232 communication is validated at all supported baud rates (typically 1200, 2400, 9600 bps) using a protocol analyzer. For COM5V2 units specifically, the non-volatile parameter memory is stress-tested through a power-cycle sequence to confirm retention. Units exhibiting display segment failures, keypad contact degradation, or output relay wear are either repaired to component level or classified as non-serviceable and excluded from inventory. Final calibration records are issued with each unit.