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Allen-Bradley 1769sc-IF4IH CompactLogix Analog HART Input Module
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- Part Number: 1769SC-IF4IH
- Brand: Allen-Bradley
- Type: Analog Input Modules
- Barcode: USA
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Product Description
The Allen-Bradley 1769sc-IF4IH, also cataloged as the 1769sc-IF4IH Analog+ HART Input Module, operates as a dedicated hardware component for multi-channel HART instrument signal acquisition and backplane data conversion within CompactLogix / MicroLogix 1500 platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769sc-IF4IH |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.56 lbs (0.26 kg) |
| Dimensions | Standard 1769 Compact I/O Single-Slot Width |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Standard 1769 Backplane Bus Powered |
| Product Line | CompactLogix |
| Product Type | Analog+ HART Input Module |
| Channels | 4 isolated input channels |
| Voltage Inputs | 0-5 V, 1-5 V, 0-10 V, +/-10 V |
| Current Inputs | 0-20 mA, 4-20 mA |
| Resolution | 16-bits |
| HART Variables | PV, SV, TV, FV |
| Accuracy | +/-0.2% of range voltage, +/-0.35% of range current |
| Filter Frequencies | 28.5 Hz, 50 Hz, 60 Hz, 300 Hz, 360 Hz |
| Update Times | 18 to 488 ms (all channels), 6 s (HART data) |
| Data Formats | Engineering units, Scaled-for-PID, Percent of full-scale, Raw/proportional |
| Certifications | UL/cUL Listed ANSI ISA 12.12.01 (Class I, Div 2, Groups ABCD), CE |
EtherNet/IP & Deterministic Channel Isolation
The module manages backplane bus communication velocity and real-time analog data translation across 1769 Compact I/O buses. Channel-to-channel signal integrity is maintained through selective Digital-to-Analog conversion paths operating at 16-bit resolution. Integrated firmware flash compatibility enables simultaneous pass-through of 4-20 mA HART loop protocol dynamic variables (PV, SV, TV, FV) directly into the controller image table without degrading backplane scanning deterministic performance.
Frequently Asked Questions
Q: How does the 1769sc-IF4IH module handle simultaneous analog sampling and HART communication?
A: The internal analog-to-digital converter processes 4-20 mA analog signals at channel update times between 18 and 488 ms, while HART FSK data is scanned asynchronously across a 6-second update cycle per channel.
Q: Is external field power required for 4-20 mA loop operation on the 1769sc-IF4IH?
A: Field power depends on transmitter wiring configuration; active 4-wire transmitters supply loop voltage directly, whereas 2-wire loop-powered transmitters require an external 24 VDC loop power supply in series with the input terminals.
Field Installation Guidelines
- Disconnect backplane and field supply power from the 1769 chassis assembly before mounting or removing the module.
- Align the module tongue-and-groove slots with the adjacent 1769 I/O module or processor, sliding it back until the bus levers snap securely into position.
- Route 4-20 mA and voltage signal conductors using individually shielded twisted-pair cables to minimize electromagnetic interference.
- Ground cable shields at one single point only (typically at the panel ground bus) to eliminate ground loop currents across analog input channels.
- Set individual channel software configuration parameters for filter frequency (28.5 Hz to 360 Hz) and data format matching the field instrument specifications.
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