The Allen-Bradley 1769-OB32 is a high-density discrete output module from Allen-Bradley's 1769 Compact I/O family. For starters, this module provides thirty-two (32) sourcing outputs arranged in two isolated groups of sixteen channels each. Specifically, it is designed for use with CompactLogix controllers and MicroLogix 1500 systems, occupying just 1.5 slots in the chassis. Meanwhile, its compact form factor makes it particularly valuable for applications with high I/O counts but limited panel space. Therefore, this module delivers exceptional density without compromising performance or reliability.
To begin with, this module operates within a voltage range of 20.4 to 26.4VDC, with a nominal 24VDC rating. In addition, it delivers remarkably fast output response times, featuring an OFF to ON delay of just 0.1 ms and an ON to OFF delay of 1.0 ms. Moreover, the 1769-OB32 draws 3000 mA at 5.1 Volts from the backplane. Notably, the off-state leakage current is a minimal 1.0 mA at 26.4V DC, which effectively prevents false triggering of sensitive loads. For instance, this low leakage is especially beneficial when driving high-impedance solid-state inputs.
Furthermore, the continuous current per point is rated at 0.5 A at 60 °C and 1.0 A at 30 °C. Similarly, the module supports a surge current of 2.0 A for 10 ms, which repeats every 2 seconds. Additionally, the maximum on-state voltage drop is 1.0 VDC at 1 Amp, ensuring efficient power delivery to connected field devices. Consequently, the module's heat dissipation is rated at 4.5 Watts, which requires adequate ventilation within the control enclosure.
First, this output module provides isolation between different output groups as well as between output points and the system bus. Besides that, it features IEC Class 2 reinforced insulation, offering protection against voltages up to 75 Volts DC. For field wiring connections, however, the 1769-OB32 requires a separate 1769-RTBN18 replacement terminal block. Likewise, you will need a 1769-RL1 door label and a 1769-RD door for proper identification and protection. Therefore, these accessories are available as individual ordering kits, not included with the module itself.
Next, the power supply distance rating for the 1769-OB32 is six (6) modules. In other words, this rating defines the maximum allowable distance between this module and the power supply within the CompactLogix assembly. Exceeding this distance, however, may compromise system performance and configuration validity. For this reason, larger systems that require additional power can benefit from supplementary power supply modules. For example, you can install the 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4 along the assembly to extend the power capacity beyond the primary supply's capability.
Turning to physical dimensions, the 1769-OB32 measures approximately 118 x 52.5 x 87 mm (4.65 x 2.07 x 3.43 inches), with a height of 138 mm (5.43 inches) including mounting tabs. Moreover, it has a lightweight design, weighing only 0.99 pounds (450 grams). In terms of wiring, the module supports solid copper wire sizes from 22 to 14 AWG and stranded wire from 22 to 16 AWG, with a recommended terminal torque of 0.68 N-m. Furthermore, its operating temperature ranges from 0 to 60 °C, with a maximum altitude of 2000 meters. Nevertheless, users should observe proper derating curves when operating at higher temperatures, as reflected in the current specifications mentioned earlier.
When installing the 1769-OB32, the process is relatively straightforward. First, ensure the system power is disconnected before any installation work begins. Next, mount the module on a standard DIN rail or directly onto a panel using the integrated mounting tabs. After that, secure the module by engaging the DIN rail latches firmly into place. Following this, connect the field wiring to the 1769-RTBN18 removable terminal block, observing correct polarity for sourcing outputs. Finally, reapply power and configure the module within your Rockwell Automation programming software. For optimal performance, always adhere to the power supply distance rating and observe proper derating curves when operating at elevated temperatures.
1 x Allen-Bradley 1769-OB32 output module
1 x 1769-RL1 door label
1 x 1769-RD door
Installation instructions leaflet
Note: The 1769-RTBN18 removable terminal block is not included and must be ordered separately.
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Q1: Is the 1769-OB32 compatible with MicroLogix 1500 controllers?
A1: Yes, the 1769-OB32 works seamlessly with both CompactLogix controllers and MicroLogix 1500 systems as a local or expansion I/O module.
Q2: What is the maximum current I can draw per output channel?
A2: The maximum continuous current is 0.5 A per point at 60 °C and 1.0 A per point at 30 °C. Always observe derating for higher temperatures.
Q3: Does this module come with the removable terminal block?
A3: No, the 1769-RTBN18 terminal block is sold separately. You will need to order it as an individual kit.
Q4: Can I install this module more than 6 slots away from the power supply?
A4: No, the power supply distance rating is 6 modules. Exceeding this limit may cause configuration issues and is not recommended.
Q5: What type of protection does the 1769-OB32 offer?
A5: It features group-to-group isolation, output-to-bus isolation, and IEC Class 2 reinforced insulation up to 75 Volts DC.
| Brand Name | |
| Model No. | 1769-OB32 |
| Product Type | Output Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
