Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | IS220PHRAH1A |
| Manufacturer | GE (General Electric) |
| Product Type | HART Analog Input/Output Pack |
| System Platform | GE Speedtronic Mark VIe |
| Analog Input Channels | 10 channels (8 configurable as ±5 V or 4-20 mA; 2 configurable as ±1 V or 4-20 mA) |
| Analog Output Channels | 2 channels, 4-20 mA current loop with 18 V compliance |
| ADC Resolution | 16-bit |
| DAC Resolution | 14-bit |
| Communication | Dual 10/100 Mbps Ethernet (RJ-45), HART protocol support |
| Power Supply | 27.4 V DC to 28.0 V DC nominal |
| Operating Temperature | 0 °C to +60 °C (ambient) |
| Storage Temperature | -40 °C to +85 °C |
| Terminal Board Interface | DC-62 pin connector |
| Compatible Terminal Boards | SHRAH1A, SHRAH2A |
Main Features and Advantages
HART Communication Integration: The GE IS220PHRAH1A distinguishes itself through integrated HART modem functionality that enables bidirectional digital communication over standard 4-20 mA analog loops. This capability allows engineers to remotely access smart transmitter configuration parameters, diagnostic information, and secondary process variables directly from the control system, eliminating the need for field visits with handheld communicators. The HART interface supports both point-to-point and multidrop configurations, with update latency scaling based on the number of active channels served by each modem.
High-Precision Signal Processing: The GE IS220PHRAH1A employs a 16-bit analog-to-digital converter for input channels, ensuring accurate measurement of critical process variables such as pressure, temperature, and flow. The module’s analog input section includes passive low-pass filtering with poles at 12.5 Hz and 48.3 Hz, effectively attenuating high-frequency noise while preserving HART signal integrity. For outputs, the GE IS220PHRAH1A utilizes a 14-bit DAC driving a current regulator loop with feedback sensing both within the pack and at the terminal board, maintaining output accuracy under varying load conditions.
Redundant Network Architecture: The GE IS220PHRAH1A features dual Ethernet ports that support redundant IONet connectivity in a fault-tolerant configuration. Both network paths remain active simultaneously, with any single network failure causing no disturbance to I/O operation. This “always-active” redundancy approach provides superior fault tolerance compared to traditional hot-backup schemes where the secondary port activates only after primary failure detection. The Ethernet ports auto-negotiate between 10 and 100 Mbps speeds and support half-duplex or full-duplex operation.
Hot-Swap Capability and Modular Design: The GE IS220PHRAH1A is designed for hot-swapping, allowing replacement without shutting down the turbine or disconnecting field wiring. Soft-start circuitry controls current inrush during power application, and the module’s DC-62 connector interfaces directly with terminal boards for straightforward installation and removal. Front-panel LED indicators provide visual status for power, fault co
