Product Overview
When precise 5 VDC TTL switching is required in a ControlLogix chassis, the Allen-Bradley 1756-OG16 delivers a dedicated 16-point output solution. This digital DC output module, part of the ControlLogix series, provides low/true TTL outputs with an operational voltage range of 4.5–5.5 VDC. The 1756-OG16 is engineered for applications that demand reliable, low-voltage control signals, making it an essential component for your automation system.
Technical Specifications
The 1756-OG16 is built with performance in mind. Below are the key parameters that define its operation:
| Parameter |
Value |
| Outputs |
16-Point |
| Voltage |
5 Volts DC with TTL Source |
| Operating Voltage Range |
4.5–5.5 Volts DC |
| Maximum Output Current Rating (per point) |
24 milliamps at 60 °C |
| Maximum Output Current Rating (module) |
384 milliamps at 60 °C |
| Power Dissipation (Max) |
1.5 Watts at 60 °C |
| Backplane Current at 5 Volts |
210 milliamps |
| Removable Terminal Blocks |
1756-TBNH, 1756-TBSH |
| Isolation Voltage |
50 Volts Continuous |
With a backplane draw current of 210 mA at 5.1 VDC and a total backplane power of 1.12 W, the 1756-OG16 ensures efficient operation. Its load-dependent signal delay is 450 μs for OFF-to-ON and 700 μs for ON-to-OFF, enabling responsive control.
Industry Applications
The 1756-OG16 is ideal for applications requiring low-voltage TTL logic outputs. Typical uses include:
- Controlling indicator lamps and small relays in discrete manufacturing lines.
- Interfacing with TTL-based test equipment or custom electronics.
- Providing logic-level outputs for high-speed counting or sequencing.
In each scenario, the 1756-OG16’s precise 5 VDC operation and 24 mA per point capacity ensure reliable performance without overloading connected devices.
Installation & Setup Guidance
Installing the 1756-OG16 is straightforward. First, seat the module into an available slot of the ControlLogix chassis, ensuring it locks securely. Connect the removable terminal block (1756-TBNH or 1756-TBSH) to the module, then wire your output devices to the appropriate terminals. Observe the polarity and voltage ratings—keep the supply within the 4.5–5.5 VDC range. After wiring, configure the module in your ControlLogix programming software, mapping each output point to your control logic. Always power down the chassis before inserting or removing the module to prevent damage.
Maintenance & Reliability
The 1756-OG16 is designed for long service life. Its operational temperature range is 0–60 °C (32–140 °F) with 5–95% humidity (non-condensing), making it suitable for most industrial environments. With a shock rating of 30G and vibration tolerance of 2.0G at 10–500 Hz, the module withstands harsh conditions. To maintain reliability, periodically inspect the terminal block connections for tightness and check that the chassis environment remains within the specified limits. The module’s power dissipation of 1.5 W at 60 °C ensures minimal heat buildup, reducing thermal stress on nearby components.
Compatibility & Integration
As part of the ControlLogix family, the 1756-OG16 integrates seamlessly with other 1756-series modules in the same chassis. It is compatible with all ControlLogix controllers that support digital output modules. The module uses the standard ControlLogix backplane, so no additional communication adapters are required. This integration simplifies system design and reduces wiring complexity.
Selection Guide & Purchasing Advice
Before purchasing the 1756-OG16, verify your system’s voltage requirements and output current needs. Ensure that the 5 VDC TTL output is suitable for your load devices. Also, confirm the removable terminal block style (1756-TBNH or 1756-TBSH) matches your existing wiring. For a reliable supply of genuine Allen-Bradley 1756-OG16 modules, PLC Source PRO offers certified units with competitive pricing and fast delivery.