Product Details:

The Emerson 1C31150G02 is a rack-mounted pulse accumulator module built for Emerson Ovation distributed control systems, widely deployed in thermal power plants and heavy industrial process automation. This negative common pulse card receives pulse and frequency signals from field pulse flow meters, turbine tachometers and speed pickups. Different from 1C31150G01 positive common type, this module uses negative common excitation to match instruments with negative-side field wiring, simplifying field loop wiring design for plant instrument cabinets. It performs local high-speed pulse counting and frequency measurement on the module hardware, avoiding pulse loss under fast pulse input conditions and sending accumulated total and frequency data back to the Ovation controller for boiler and turbine performance calculation and protection logic. Users can configure pulse scaling per channel to match different instrument pulse weights and engineering units. It continuously monitors channel working status, detecting signal loss, open-circuit, short-circuit and excitation power faults, and sends diagnostic alerts to the Ovation operator workstation for maintenance scheduling. Built-in opto-coupler galvanic isolation and noise suppression circuits filter electrical noise and transient voltage spikes from long field cables, protecting internal counting circuits from interference in noisy power plant environments. Industrial-grade high-speed counting chips and rugged reinforced PCB layout are adopted, featuring strong anti-vibration performance and stable long-term operation under environments with dust, humidity and temperature fluctuation. It uses standard rack slot plug-in structure for simple installation and fast replacement during on-site maintenance, effectively cutting down equipment maintenance downtime. The Emerson 1C31150G02 cooperates with Ovation termination bases, CPU modules and rack power supplies to build complete Ovation DCS process control solutions. It is widely used in turbine shaft speed monitoring, boiler fuel flow totalization, chemical plant pulse flow measurement and oil & gas pipeline automation, delivering dependable negative common pulse accumulation and minimizing unexpected downtime of process production equipment.

Specifications

Brand: Emerson (Ovation)

Model: 1C31150G02

Product Type: Negative Common Pulse Accumulator Module

Function: Pulse and frequency acquisition, local pulse totalization, channel fault self-diagnosis

Application: Ovation distributed control rack system, power station, chemical plant, oil & gas pipeline automation

Feature: Negative common excitation, opto-isolated input, configurable pulse scaling, rack slot mounting