Products Description
ABB AV94A HESG440940R11 HESG216791/A Analog Input Board in stock
ABB AV94A with part numbers HESG440940R11 and HESG216791/A is an analog input board designed for ABB Advant OCS DCS system. It samples multi-channel analog field signals and converts them into digital data for the DCS controller processing.
This board supports standard industrial analog signals and provides signal filtering and overvoltage protection. It belongs to legacy DCS hardware, mainly supplied as maintenance spare parts for old power and chemical plant control cabinets.
Main Specifications
| No. | Item | Parameter |
|---|---|---|
| 1 | Brand | ABB |
| 2 | Model | AV94A, HESG440940R11, HESG216791/A |
| 3 | Module Type | Analog Input Board |
| 4 | Application System | ABB Advant OCS DCS System |
| 5 | Signal Type | 4-20mA, 0-10V analog field signals |
| 6 | Function | Analog signal acquisition, A/D conversion, signal filtering |
| 7 | Mounting | Rack mounted, backplane bus connection |
| 8 | Product Status | Discontinued, spare replacement only |
Core Functions
| No. | Function Description |
|---|---|
| 1 | Receive analog measurement signals from field transmitters and sensors |
| 2 | Complete A/D conversion, convert analog signals into digital values for DCS controller |
| 3 | Built-in signal filtering and overvoltage protection to suppress field interference |
| 4 | Transmit sampled digital data to controller via backplane bus |
| 5 | Module self-diagnosis for channel faults, with status LED indication |
Application Scenarios
| No. | Application |
|---|---|
| 1 | Thermal power plant Advant OCS DCS control cabinet |
| 2 | Chemical and petrochemical plant process monitoring system |
| 3 | Pulp & paper, metallurgy legacy distributed control system |
| 4 | DCS cabinet overhaul, analog input board replacement and maintenance |
| 5 | Old industrial automation system spare parts inventory |
FAQ
| No. | Question & Answer |
|---|---|
| 1 | Q:What is ABB AV94A HESG440940R11 HESG216791/A? A:It is analog input board for ABB Advant OCS DCS, used to collect 4-20mA / 0-10V field analog measurement signals. |
| 2 | Q:What signals can it process? A:Standard industrial analog signals like 4-20mA current and 0-10V voltage signals from pressure, temperature and flow transmitters. |
| 3 | Q:Is this board still in production? A:ABB has discontinued this model, it is only available as spare part for maintenance of existing Advant OCS DCS systems. |
