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Description
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 1734-IE4S |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Safety Analog Input Module – POINT Guard I/O™ |
| Number of Inputs | 4 Single-ended Safety Analog Inputs |
| Input Signal Ranges | ±10V, ±5V, 0-5V, 0-10V, 4-20 mA, 0-20 mA, Tachometer (1-1000 Hz) -1-4 |
| Resolution | 12 Bit -2-7 |
| Input Filter | 10 Hz Single-pole Anti-aliasing + 4-pole Digital Filter (1, 5, 10, 50 Hz selectable) -4 |
| Supply Voltage | 24V DC -1-2 |
| Pointbus Current | 110 mA -10-12 |
| Dimensions (W×H×D) | 25 × 77 × 55 mm -2 |
| Operating Temperature | -20°C to +55°C -2 |
| Storage Temperature | -40°C to +85°C -2 |
| Humidity | 5-95% RH (Non-condensing) -2 |
| Mounting | DIN Rail (EN 60715) -8-10 |
| Safety Rating | SIL 3 (Single-channel), SIL CL3/PLe/Cat. 4 (Dual-channel equivalent) -5 |
| Communication Protocol | CIP Safety™ over EtherNet/IP™ or DeviceNet™ -9 |
Main Features and Advantages
Multi-Range Input Flexibility: The 1734-IE4S supports seven configurable input ranges, accommodating virtually any industrial analog sensor including 4-20 mA transmitters, 0-10 V pressure sensors, ±10V position feedback devices, and tachometer inputs for rotational speed monitoring -1-4-5. The tachometer mode converts 24V DC switching signals from proximity sensors or encoders into pulses per second, making the 1734-IE4S ideal for safety-rated speed monitoring applications such as overspeed detection on rotating machinery -4-5.
Dual-Channel Safety Architecture: In dual-channel equivalent mode, the 1734-IE4S continuously evaluates the consistency between two input signals, ensuring that both sensors measuring the same process variable produce values within a configured discrepancy deadband -4. If the difference exceeds the deadband for longer than the configurable discrepancy time, a fault is declared and the input status bits are set low. This architecture enables the 1734-IE4S to achieve SIL CL3/PLe/Cat. 4 ratings for safety functions such as emergency shutdown and overpressure protection -4-5.
Intelligent Sensor Power Management: The 1734-IE4S provides individually current-limited and monitored sensor power outputs that can be configured to supply power to connected sensors -4. This feature enables the module to detect sensor power loss, overcurrent conditions, and shorts in sensor wiring, providing comprehensive diagnostics that enhance system availability. At power-up, each sensor power supply undergoes a 500 ms diagnostic test to verify proper operation -4.
Advanced Signal Processing: The 1734-IE4S incorporates a 10 Hz single-pole anti-aliasing filter followed by a four-pole digital filter with selectable corner frequencies (1, 5, 10, 50 Hz) -4. This filtering architecture effectively removes electrical noise that can compromise measurement accuracy in industrial environments. Additionally, the module supports configurable channel offsets, allowing users to compensate for differences between sensors from different manufacturers that may produce slightly different data values for the same process variable -4.
Process Alarm Capabilities: The 1734-IE4S features four configurable process alarm trigger points (High-High, High, Low, Low-Low) with deadband tolerance to alert operators when analog input values exceed acceptable limits -4. This enables preventive maintenance strategies and early warning of process deviations, improving overall system safety and reducing unplanned downtime.
CIP Safety™ Protocol Integration: The 1734-IE4S communicates using the CIP Safety™ protocol, enabling seamless integration with GuardLogix® controllers and other Allen-Bradley safety systems -9. This ensures consistent data exchange between standard and safety I/O, simplifying programming, commissioning, and diagnostics.
