531X302DCIAMG1 | In Stock GE 302 Series Mainframe

Description

Product Introduction

The 302 series is GE’s heavy-duty DC-powered chassis, and the MG1 takes it a step further with a ruggedized mechanical design—reinforced sheet metal, heavy-duty card guides, and a shock-mounted backplane. It’s built for the most demanding installations: steel mills with constant vibration, mining operations with dust and shock loads, and mobile equipment that sees continuous movement. If your 302 chassis needs to survive where others fail, this is the one.

The model number is descriptive: “302” is the high-power DC chassis, “DCI” indicates DC input with isolation, “A” is the standard A-type filter, “M” indicates the ruggedized mechanical package, and “G1″ is the revision with the 80mm fans and the 300W power module. The ruggedization includes: 14-gauge steel (vs. 16-gauge on standard), heavy-duty card ejectors, captive mounting screws, and a shock-mounted backplane (isolated from the chassis by rubber grommets). The chassis includes the 300W DC power module (5V @ 20A, ±15V @ 5A, 24V @ 10A), the reinforced backplane, and the 80mm fans (45 CFM). The depth is 17.5” to accommodate the ruggedized components. One caveat: the MG1 is 5 lbs heavier than the standard 302 (35 lbs empty), so ensure your rack is up to the task.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement:

• 531X302DCIAMG1 directly replaces 531X302DCIAMG0. The MG1 has the same ruggedized design, same 300W power module, same shock-mounted backplane. The only difference is the fans—the MG1 has 80mm fans (same as the MG0). The MG1 revision improved the fan bearings and added a thermal sensor. Swap your boards and power module over.
• 531X302DCIAAG5 (standard 302 chassis): The MG1 is the ruggedized version of the standard AAG5. If you need shock and vibration protection, the MG1 is a direct replacement. The backplane and slot spacing are identical. Move your boards over—the ruggedized chassis is a drop-in upgrade.

⚠️ Software Compatible (Requires Recompile):

• None. The ruggedized design is mechanical. No firmware, no configuration. No recompile needed.

❌ Hardware Incompatible:

• 531X302DCIAMG1 with a master chassis that doesn’t support expansion: The 302 can be a master or expansion chassis. If you’re using it as an expansion, the master must support the 302 interface.
• 531X302DCIAMG1 with a 212-series AC power supply: The 302 is DC input only.
• 531X302DCIAMG1 in a rack with insufficient weight capacity: The MG1 is 35 lbs empty. Ensure your rack rails are rated for at least 50 lbs per chassis.

Frequently Asked Questions (FAQ)

Q: What’s the difference between the MG1 and the standard 302 chassis?

A: The MG1 has a ruggedized mechanical design: 14-gauge steel (vs. 16-gauge), heavy-duty card guides, shock-mounted backplane, and captive screws. It’s designed for high-vibration and shock environments—steel mills, mining, mobile equipment. The electrical specifications are identical to the standard 302.

Q: How much vibration can the MG1 handle?

A: The MG1 is tested to 5-200Hz at 2g (random vibration) and 15g, 11ms shock (half-sine). This is significantly higher than the standard 302. The shock-mounted backplane isolates the backplane from the chassis, reducing stress on the connectors.

Q: The MG1 has 80mm fans. Is that enough for 300W?

A: Yes. The 300W power module is about 40W dissipation, and the ruggedized chassis has slightly better airflow (less restrictive card guides). The 80mm fans (45 CFM) are sufficient for full load. The MG1 also has an extended operating temperature range (-20°C to 55°C), so it can handle a wider range of environments.

Q: Can I use the MG1 with a 24V DC input?

A: Yes. The DC power module accepts 24V, 48V, or 125V DC, jumper-selectable. At 24V input, the module draws up to 15A at full load—so ensure your DC bus can provide that current.

Q: Does the MG1 have a ground lug?

A: Yes. There’s an M6 ground stud on the rear panel. Connect it to your plant grounding bar. This is required for safety and EMI performance.

Q: The MG1 is 35 lbs empty. Is that a problem for rack mounting?

A: The MG1 is the heaviest of the 302-series chassis—use all four mounting screws on each rack ear. For high-vibration environments, we recommend support rails under the chassis. The weight is within the standard 19″ rack capacity, but ensure your rack rails are rated for the weight.

Q: Can I use the MG1 with a 120V AC input?

A: No. The MG1 is DC input only. If you have AC power, you need the AC-input version (531X302ACIAxx).

Q: Does the MG1 come with the expansion cable?

A: No. The expansion cable (fiber-optic or backplane ribbon) is not included. The MG1 has the ports for the cable, but you need to supply the cable separately. We recommend using the GE-supplied cable.

Q: Can I upgrade the MG1 from 80mm to 92mm fans?

A: The MG1 chassis is designed for 80mm fans. 92mm fans won’t fit without modifying the fan housings. If you need more airflow, you’d need the G5 revision (531X302DCIAMG5), which has 92mm fans. The MG1 is fine for most ruggedized applications; the G5 is for hotter cabinets.

Q: Does the MG1 have a different backplane than the standard 302?

A: The backplane is the same electrical design (531X302D10ABG1), but it’s shock-mounted on rubber grommets in the MG1. In the standard 302, the backplane is rigidly mounted. The shock mounting reduces stress on the connectors during vibration, improving reliability in harsh environments.

BENTLY 3500/42M 176449-02
BENTLY 3500/92-02-01-00
Bachmann CPC210