Description
Allen‑Bradley 1756-IF16H is a 16-channel HART-capable current analog input module
Model: 1756-IF16H | ControlLogix 16-Ch HART Analog Input Module
Product Title & Description
The Allen‑Bradley 1756-IF16H is a 16-channel HART-capable current analog input module for Rockwell ControlLogix 1756 chassis. It reads 4–20mA / 0–20mA analog signals from field transmitters and supports bidirectional HART communication, allowing access to HART device PV, diagnostics, tag information and device parameters. Widely used in petrochemical, power, water treatment, pulp & paper and metallurgy DCS/PLC systems. It is commonly paired with 1756-L73 ControlLogix CPU and SST-SR4-CLX PROFIBUS module.
Core Product Overview
1756-IF16H is single-slot ControlLogix I/O module with 16 differential current input channels, each channel integrated with dedicated HART modem. It can simultaneously collect analog process value and HART smart device data. Three data modes available in Studio5000 / RSLogix5000:
- Analog only
- Analog + HART PV
- Analog + full HART data per channel
Built-in open-circuit detection, overvoltage protection, configurable digital filtering and module/channel fault diagnostics. Supports RIUP (Remove/Insert Under Power) on qualified chassis/firmware. Ideal for smart transmitters (pressure, level, flow, temperature) asset management and predictive maintenance.
1756-IF16H
Main Technical Specifications
- Manufacturer: Rockwell Automation (Allen‑Bradley)
- Part Number: 1756-IF16H
- Product Type: 16-Ch HART Analog Current Input Module
- Platform: ControlLogix 1756 chassis, single slot
- Input signal: 4–20mA / 0–20mA
- Resolution: 16~21 bits
- Input impedance: 249Ω
- Backplane power: 5.1VDC @200mA; 24VDC @125mA; total power consumption max 6W
- Isolation: Basic insulation, inputs to backplane; no isolation between individual channels
- Terminal block: 1756-TBCH / 1756-TBS6H (removable)
- Diagnostics: Open circuit detection, overvoltage, module health LED
- Software: Studio5000 / RSLogix5000 V15+
- Operating Temperature: 0°C ~ +60°C
- Storage Temperature: -40°C ~ +85°C
- Relative Humidity: 5%~95%, non-condensing
- Protection Class: IP20 (cabinet installation)
- Certifications: CE, UL, cUL
- Origin: Mexico
Quality Control Procedures
Rockwell I/O modules comply with ISO9001 and IEC industrial control standards.
- Incoming inspection: precision A/D converters, HART modems, signal front-end chips and terminal connectors screening.
- Automated SMT assembly, unique serial number for full lifecycle traceability.
- Full functional test: analog sampling accuracy, HART communication, open-circuit fault detection, backplane bus test.
- Environmental stress screening: thermal cycling, vibration, EMC surge test for industrial cabinet environments.
- Final inspection & packing: visual inspection, anti-static packaging with factory test report.
Brand Related Matching & Replacement Models
- 1756-IF16: Non-HART 16-point analog input module
- 1756-IF8H: 8-channel HART analog input module
- 1756-L73: ControlLogix CPU commonly matched
- SST-SR4-CLX: PROFIBUS DP master module for ControlLogix
- 1756-OF8H: HART analog output module
1756-IF16H
Frequently Asked Questions (FAQ)
Q1: What is the difference between 1756-IF16H and 1756-IF16? A1: 1756- supports HART protocol for smart transmitter parameter reading/diagnostics; 1756-IF16 is ordinary analog input without HART.
Q2: Can it read HART device diagnostics? A2: Yes, per-channel HART modem can retrieve device status, alarms, tag, PV and engineering units.
Q3: Is it hot-swappable? A3: Supports RIUP (Remove/Insert Under Power) on supported ControlLogix chassis and firmware versions.
Q4: What terminal block fits 1756-? A4: 1756-TBCH or 1756-TBS6H removable terminal block.
Q5: Warranty for original Allen‑Bradley 1756-? A5: Original Rockwell module carries standard 12-month factory warranty against manufacturing defects under proper installation and operating conditions.
Installation & Configuration Guide
7.1 Pre-installation Preparation
Verify 1756- module, inspect front LED and backplane connector. Prepare 1756 chassis, removable terminal block, shielded 4-20mA HART cable, 24VDC field power, Studio5000 software. Power off chassis before installation, wear ESD protection.
7.2 Installation Steps
Insert 1756- into empty 1756 rack slot and lock the module. Mount RTB terminal block. Wire HART transmitters with shielded twisted pair cables, single-point shield ground in control cabinet. Wire field 24V power for transmitters. Check backplane connection and cabinet ventilation.
7.3 System Configuration & Commissioning
Open Studio5000, add 1756- to hardware tree, select data mode (Analog / Analog+HART). Configure channel signal range, filter and fault alarm settings. Download project to ControlLogix controller. Power up module, check LED status. Verify 4-20mA value reading and HART device online information. Test open-circuit alarm function. Save project and module configuration.
7.4 Maintenance & Precautions
During shutdown, inspect wiring terminals, cable shielding and module LED. Keep cabinet clean and dust-free. Use HART-compliant shielded cables. If signal drift or HART communication failure occurs, check transmitter, 24V field supply and cable before replacing 1756-.
Start Chat
Send an Email
