What are the similarities and differences between M9018B and M9018A?
Similarities
- Same backplane and cooling performance
- Legacy driver mode for SW compatibility (new driver needed for new features)
Differences
- M9018B has front panel SMB trigger ports provide access to PXI Trig (0:7)
- M9018B has a one button power control for multi-chassis power sequencing
- M9018B has a new power supply for improved reliability and more DC power (+3.3V and +12V) for PXIe modules
Some key specifications comparison:
| M9018A | M9018B | |
|---|---|---|
| Slots | 16 Hybrid, 1 PXIe controller, 1 PXIe timing | |
| Backplane Fabric | PCIe revision 2.0 (Gen 2) | |
| Data Bandwidth |
To system slot: 8 GB/s maximum Slot-to-slot: 4 GB/s maximum |
|
| System Slot Configuration |
4 Link: 4x4, 2-link: 2x8, or 2-link: link 2 inactive (M9021A mode) Configurable |
|
| Module Compatibility |
3U: PXIe, PXI-Hybrid, PXI-1 (J1 only), cPCI (J1 only) |
|
| Usable DC Module Power |
100 – 120 V: 710 W 220 – 240 V: 860 W |
100 – 120 V: 708 W
220 – 240 V: 858 W |
| Slot Airflow Direction | Bottom of chassis to top of module | |
| Chassis Cooling |
Intake: Bottom front bezel, side panels, and bottom of chassis Exhaust: Rear of chassis |
|
| Power Dissipation |
System slot: 140 W maximum User Slot: 42 W maximum depending on configuration |
|
| Multi-chassis power sync | No | Yes |
| Front panel trigger ports | No | Yes |
| Operating Conditions |
Temperature: 0 – 55 C Altitude: up to 3000 m |
|
Chassis power supply comparison:
-
More power for next generation PXIe modules
- M9018B doesn’t share power between critical rails for PXIe modules
- Max rail current provided at typical worst case environments: <10kft and <45C°
| Module Power | M9018A | M9018B |
|---|---|---|
| +3.3V | 60A² | 70A |
| +12V | 51.3A² | 57.4A¹ |
| +5V | 58.8A | 60A¹ |
| -12V | 4A | 4A |
| Max Module Power at Low Line (120V) | 710 | 708 |
| Max Module Power at High Line (220V) | 860 | 858 |
¹Power shared between +12V and +5V
²Power shared between +12V and +3.3V