Product Description
Allen-Bradley 1756-IB32 DC Digital I/O Module
The Allen-Bradley 1756-IB32 is a DC Digital I/O Module designed for high-density input applications in industrial automation systems. It provides 32 inputs with sink-type digital inputs for 12/24V DC operations.
Technical Specifications
Input Characteristics
| Attribute | Specification |
|---|---|
| Inputs | 32 (16 points per group) |
| Voltage Category | 12/24V DC Sink |
| Operating Voltage Range | 10–31.2V DC |
| Nominal Input Voltage | 24V DC |
| Input Delay Time (Screw to Backplane) |
Off to On: 380 µs max + filter time (User-selectable: 0 ms, 1 ms, or 2 ms) On to Off: 420 µs max + filter time (User-selectable: 0 ms, 1 ms, 2 ms, 9 ms, or 18 ms) |
| Current Draw |
@ 5.1V: 120 mA @ 24V: 2 mA |
| Total Backplane Power | 0.66 W |
| Power Dissipation (Max) | 6.2 W @ 60°C (140°F) |
| Thermal Dissipation | 21.1 BTU/hr @ 60°C (140°F) |
| Off-State Voltage (Max) | 5V |
| Off-State Current (Max) | 2.27 mA |
| On-State Current |
Min: 4.8 mA @ 10V DC Max: 5.5 mA @ 31.2V DC |
| Inrush Current (Max) | 250 mA (decaying to <37% in 22 ms, without activation) |
| Input Impedance (Max) | 5.67 kΩ @ 31.2V DC |
Electrical and Functional Properties
| Parameter | Value |
|---|---|
| Cyclic Update Time | 200 µs – 750 ms |
| Change of State | Software configurable |
| Timestamp of Inputs | ±200 µs |
| Isolation Voltage |
250V (continuous): Reinforced insulation type, inputs-to-backplane 250V (continuous): Basic insulation type, input group-to-group No isolation between individual group inputs |
| Module Keying | Electronic, software configurable |
| Removable Terminal Block (RTB) | 1756-TBCH, 1756-TBS6H, 1756-TBCHXT, 1756-TBS6HXT |
| RTB Keying | User-defined mechanical |
| Slot Width | 1 |
| Wire Category | 1 - on signal ports |
| Reverse Polarity Protection | Yes |
Wiring & Terminal Block Specifications
| Terminal Block Type | Wire Size |
|---|---|
| 1756-TBCH / 1756-TBCHXT |
Single Wire: 0.33–2.1 mm² (22–14 AWG) solid/stranded copper wire rated at 105°C (221°F) Double Wire: 0.33–1.3 mm² (22–16 AWG) solid/stranded copper wire rated at 105°C (221°F) |
| 1756-TBS6H / 1756-TBS6HXT | Single Wire: 0.33–2.1 mm² (22–14 AWG) solid/stranded shielded copper wire rated at 105°C (221°F) |
| Terminal Block Torque Specs | 0.5 N•m (4.4 lb•in) |
Environmental Specifications
| Attribute | Specification |
|---|---|
| Operating Temperature | 0–60°C (32–140°F) |
| Non-Operating Temperature | -40 to +85°C (-40 to +185°F) |
| Relative Humidity | 5–95% non-condensing |
| Conformal Coating | Yes |
| Corrosive Atmosphere Resistance |
ASTM B845-97 Method H: Severity Level G3 (ANSI/ISA 71.04-2013) ASTM B845-97 Method K: Severity Level GX (ANSI/ISA 71.04-2013) IEC 60721-3-3:2019: Severity Level CX |
| Vibration Resistance | 2 g @ 10–500 Hz |
| Shock Resistance (Operating) | 30 g |
| Shock Resistance (Non-Operating) | 50 g |
Electromagnetic Compliance & Immunity
| Parameter | Compliance Standard | Specification |
|---|---|---|
| Emissions | IEC 61000-6-4 | - |
| ESD Immunity | IEC 61000-4-2 |
6 kV (contact discharges) 8 kV (air discharges) |
| Radiated RF Immunity | IEC 61000-4-3 |
10V/m with 1 kHz sine wave 80% AM (80–2000 MHz) 10V/m with 200 Hz 50% Pulse 100% AM @ 900 MHz 10V/m with 200 Hz 50% Pulse 100% AM @ 1890 MHz 3V/m with 1 kHz sine wave 80% AM (2000–2700 MHz) |