531X302DCIBBG1 | In Stock GE 302 Series Mainframe

Description

Product Introduction

The BBG1 is the ultimate 302 chassis: dual redundant 300W power modules, B-type DC input filter (80dB attenuation, 20kA surge), and a ruggedized mechanical design—14-gauge steel, heavy-duty card guides, shock-mounted backplane, and captive screws. It’s built for the most demanding applications: steel mills, mining operations, and large DC bus systems with heavy welding equipment, frequent lightning strikes, and constant vibration. It’s the chassis that can survive where others fail.

The model number is descriptive: “302” is the high-power DC chassis, “DCI” indicates DC input with isolation, “BB” indicates the dual bay configuration with B-filter and ruggedized design, and “G1″ is the revision with the 80mm fans. The chassis has two power supply bays, each accepting a 300W DC-DC converter (531X302PWR1). The outputs are diode-ORed on the backplane—failover is automatic and seamless (<100ms). The ruggedized design includes 14-gauge steel, heavy-duty card ejectors, captive mounting screws, and a shock-mounted backplane. The B-type filter adds about 1″ to the chassis depth. The depth is 19.5” to accommodate the dual modules and the B-filter. The fans are 80mm (45 CFM). One caveat: the BBG1 is 43 lbs empty—ensure your rack can handle it. Also, the B-filter has a higher leakage current (about 3mA per module) than the A-type.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement:

• 531X302DCIBBG1 directly replaces 531X302DCIBBG0. The BBG1 has the same redundant architecture, same dual bays, same B-filter, same ruggedized design. The only difference is the fans—the BBG1 has 80mm fans (same as the BBG0). The BBG1 revision improved the fan bearings. Swap your boards and power modules over.
• 531X302DCIAAG5 (standard single-power 302): The BBG1 is the redundant B-filter ruggedized version. If you need all three features, the BBG1 is a direct replacement (though it’s much heavier).

⚠️ Software Compatible (Requires Recompile):

• None. The redundant power system is purely hardware—no firmware, no configuration. No recompile needed.

❌ Hardware Incompatible:

• 531X302DCIBBG1 with mismatched power modules: Both modules must be identical (both 531X302PWR1). Mixing modules can cause voltage regulation issues.
• 531X302DCIBBG1 with a DC bus that has high leakage current: The B-filter’s leakage current is 3mA per module (6mA total). If your DC bus already has leakage, you might trip GFCIs.
• 531X302DCIBBG1 with a master chassis that doesn’t support expansion: The 302 can be a master or expansion chassis. If using it as an expansion, the master must support the 302 interface.
• 531X302DCIBBG1 with a 212-series AC power supply: The 302 is DC input only.

Frequently Asked Questions (FAQ)

Q: What’s the advantage of the BBG1 over other 302 chassis?

A: The BBG1 combines three features: dual redundant 300W power modules, B-type filter (80dB attenuation, 20kA surge), and ruggedized mechanical design (14-gauge steel, shock-mounted backplane). It’s the most robust 302 chassis GE made—designed for the harshest environments and most critical applications.

Q: How much vibration can the BBG1 handle?

A: The BBG1 is tested to 5-200Hz at 2g (random vibration) and 15g, 11ms shock (half-sine). The shock-mounted backplane and reinforced chassis make it suitable for steel mills, mining, and mobile equipment.

Q: Does the B-filter cause GFCI issues?

A: Yes, it can. The B-filter has a leakage current of about 3mA per module. With two modules, the total leakage is about 6mA. A typical GFCI trips at 5mA. Use a GFCI with a higher threshold (10mA or 30mA) or a non-GFCI circuit. Check local electrical codes.

Q: Can I replace a power module while the chassis is running?

A: Yes. The power modules are hot-swappable. You can pull out a failed module and slide in a new one without powering down the chassis. The other module will keep the backplane powered. However, be careful: the module you’re removing might be hot. We recommend powering down for safety, but the BBG1 supports hot-swap.

Q: What’s the total power capacity of the BBG1?

A: The total power capacity is 300W—the same as a single module. The redundancy doesn’t increase capacity. Both modules share the load when both are working (they’re load-balanced), but the total is still 300W.

Q: The BBG1 is 43 lbs empty. Is that a problem for rack mounting?

A: The BBG1 is the heaviest of all 302-series chassis—use all four mounting screws on each rack ear. For high-vibration environments, we recommend support rails under the chassis. Ensure your rack rails are rated for at least 60 lbs per chassis.

Q: Does the BBG1 have a separate DC input for each module?

A: Yes. Each power module has its own DC input terminal. You should power each module from a separate DC source (e.g., two separate battery banks or two separate UPS outputs) for true redundancy.

Q: Does the BBG1 come with the expansion cable?

A: No. The expansion cable (fiber-optic or backplane ribbon) is not included. The BBG1 has the ports for the cable, but you need to supply the cable separately. We recommend using the GE-supplied cable.

Q: Can I use the BBG1 with a 24V DC input?

A: Yes. Each power module accepts 24V, 48V, or 125V DC, jumper-selectable. Set both modules to the same input voltage. At 24V input, each module draws up to 15A at full load—so ensure your DC bus can provide the required current.

Q: What’s the relay rating on the status output?

A: The dry contact relay is rated for 2A @ 30V DC or 0.5A @ 120V AC. It’s a Form A contact (NO). The relay is energized when both modules are OK. If one module fails, the relay de-energizes. You can wire this to a PLC input, an alarm lamp, or a safety relay.

GE IC695RMX128
NI SCXI-1162HV
ABB 07AC91D