Products Description
| Company Information | |||
| [email protected] | |||
| Mobile | +8613950166376 | ||
| +8613950166376 | |||
| 13950166376 |
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Allen‑Bradley 1756‑OB8 ControlLogix Digital DC Output Module |
| Module Type | Digital DC output module (sourcing) |
| Series | ControlLogix 1756 I/O family |
| Number of Outputs | 8 DC output channels |
| Output Voltage Range | 10 – 31.2 V DC (nominal 12/24 V supply) |
| Output Current per Point | Up to ~2 A per channel @ 30 °C, derated at higher temperatures |
| Total Output Current | ~8 A (max combined, derated at temperature) |
| Isolation Voltage | ~250 V continuous between outputs and backplane |
| Backplane Current (5.1 VDC) | ~200–300 mA |
| Backplane Current (24 VDC) | ~2 mA |
| Power Dissipation | ~2.5–4 W depending on load and temperature |
| Output Delay Time | Typical ~1 ms |
| Minimum Load Current | ~1 mA per channel |
| Surge Current | Pulse rating for fault and inrush conditions |
| Connection Type | Removable terminal block (e.g., 1756‑TBCH or 1756‑TBS6H) |
| Operating Temperature Range | 0 °C to 60 °C |
| Storage Temperature Range | –40 °C to 85 °C |
| Relative Humidity (Non‑condensing) | 5 % to 95 % |
| Dimensions (H × W × D) | ~300 mm × 38.1 mm × 111.25 mm (standard ControlLogix I/O format) |
| Weight | ~0.30–0.35 kg |
FAQ
FAQ
Q1: What is the main purpose of the 1756‑OB8 module?
It provides eight discrete DC output channels for driving external loads such as relays, solenoids, and actuators.
Q2: What DC voltage range does this module support?
It operates over approximately 10 – 31.2 V DC with a nominal 12/24 V supply.
Q3: How much current can each output channel deliver?
Each output can source up to around 2 A per point at 30 °C, with derating at higher temperatures.
Q4: Does the module provide isolation?
Yes, it provides continuous isolation (~250 V) between the output circuits and the backplane.
Q5: Does this module require separate power for outputs?
Yes — the DC outputs require an external DC power source (typically 24 V DC).
Q6: How is the module wired to field devices?
Field wiring connects through a removable terminal block such as 1756‑TBCH or 1756‑TBS6H.
Q7: What are the environmental operating limits?
It operates from 0 °C to 60 °C and can be stored from –40 °C to 85 °C with up to 95 % non‑condensing humidity.
Q8: What are the typical size and weight of the module?
Dimensions are roughly 300 mm × 38 mm × 111 mm and weight is about 0.30–0.35 kg.
Tags
Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
