Description
Technical Parameters & Specifications
| Parameter | Specification |
|---|---|
| Analog Inputs | 8 differential channels, individually software-configurable |
| Input Signal Types | Thermocouple (J, K, T, E, R, S, B, N), RTD (Pt100, Ni100), 4-20mA, 0-10V, ±50mV, ±100mV, ±1V |
| Analog Outputs | 4 isolated channels, configurable for 0-20mA, 4-20mA, or 0-10V |
| ADC Resolution | 18-bit sigma-delta (effective resolution: 16.5 bits at 10Hz sampling) |
| Sampling Rate | Up to 500 Hz per channel (configurable) |
| Accuracy | ±0.05% of full scale at 25°C; ±0.15% over -40°C to +85°C range |
| Isolation Voltage | 2000V RMS galvanic isolation (field-to-backplane and channel-to-channel) |
| Operating Temperature | -40°C to +85°C (meets IEC 60068-2-1 and -2) |
| Storage Temperature | -55°C to +100°C |
| Power Supply | +5V DC @ 1.5A; +15V DC @ 0.6A; -15V DC @ 0.1A (via VME P2 backplane) |
| Diagnostics | Per-channel open/short detection, out-of-range alarms, internal temperature monitoring, supply voltage telemetry, watchdog timer with configurable fail-safe outputs |
| Form Factor | 6U VME (single-slot, 233mm x 160mm, 20mm pitch) |
| Firmware | Field-upgradeable via dedicated JTAG port and serial EEPROM |
| LED Indicators | Module OK (green), communication active (yellow), per-channel fault (red) |
| MTBF | >250,000 hours (per MIL-HDBK-217F, ground benign conditions) |
The General Electric DS3800HMAC1G1E represents a significant evolution from its predecessor, with the upgraded ADC and improved noise rejection delivering measurable performance gains in high-vibration turbine environments.
Advantages and Key Features
The General Electric DS3800HMAC1G1E offers several distinct engineering advantages that set it apart from earlier HMAC variants and competing solutions:
Universal Input Architecture
Each of the 8 inputs can be independently configured through software for thermocouple, RTD, or DC current/voltage without physical jumper changes. This feature eliminates the need for multiple spare module types and reduces field wiring errors. The General Electric DS3800HMAC1G1E supports the full IEC thermocouple linearization standard (ITS-90), ensuring compatibility with modern temperature sensors.
Enhanced Signal Integrity
-
Dual-stage EMI filtering – The module includes common-mode and differential-mode filters at each input, providing >80dB rejection at 50/60Hz and superior performance in variable-frequency drive (VFD) environments.
-
Automatic CJC (Cold-Junction Compensation) – Three onboard precision temperature sensors (one per every 3 channels) continuously correct for terminal block temperature variations, achieving ±0.5°C CJC accuracy – a 25% improvement over the F1E revision.
Advanced Diagnostics and Safety
-
Per-channel health monitoring – The General Electric DS3800HMAC1G1E continuously evaluates each input for open circuits, shorted shunts, over/under-range conditions, and rate-of-change exceedance. Faults are reported via the VME bus and displayed on the front panel LEDs.
-
Independent watchdog with failsafe outputs – If the main CPU fails to refresh the watchdog within a configurable timeout (default 100ms), all analog outputs automatically transition to a user-defined safe state (0mA, 4mA min., or hold-last-value).
-
On-board non-volatile memory – Critical calibration constants and configuration settings are stored in EEPROM; the General Electric DS3800HMAC1G1E retains these values for over 20 years without backplane power.
Hot-Swap and Redundancy Ready
The module fully supports the VMEbus hot-swap specification (IEEE 1101.11), allowing insertion and removal from an energized backplane without affecting other boards. This is critical for maintaining triple-redundant I/O configurations in Mark V systems, where the General Electric DS3800HMAC1G1E can be replaced while the turbine remains online.
Extended Calibration Interval
Factory calibration is certified for 5 years (compared to 2 years for most competitors), reducing maintenance costs and unplanned outages.
Application Fields and Use Cases
The General Electric DS3800HMAC1G1E is deployed exclusively in mission-critical power
AB 1769-PA4
ABB XVC768AE103/3BHB007211R0103
A-B 1769-IF4XOF2
Reviews
There are no reviews yet.