Product Description
The Mitsubishi Electric Q38B is a main base unit (backplane rack) for the MELSEC-Q Series (QnU) programmable logic controller platform. It provides 8 I/O expansion slots plus 1 dedicated power supply slot, and serves as the physical and electrical backbone connecting CPU modules, power supplies, I/O modules, and special function modules. The Q38B supports single and multi-CPU configurations with up to four CPUs on the same backplane, and can be panel-mounted or DIN rail-mounted using optional adapters.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Mitsubishi Electric |
| Model / Part Number | Q38B |
| Product Type | PLC Chassis / Main Base Unit (Backplane Rack) |
| Product Series | MELSEC-Q (QnU) |
| Number of I/O Module Slots | 8 (excluding 1st CPU slot) |
| Power Supply Slots | 1 |
| Redundant Power Supply Slot | No |
| Max CPUs per Backplane | 4 |
| CPU Configuration | Single-CPU and Multi-CPU supported |
| Max Extension Base Units | 7 (total 8 bases) |
| Max Extension Distance | 13.2 m (43.28 ft) |
| Max Total Installed Modules | 64 |
| Dimensions (W x H) | 328 x 98 mm (12.92 x 3.86 in) |
| Weight | 0.36 kg (0.79 lbs) |
| Mounting Type | Panel Mount (direct bolt) or DIN Rail (with Q6DIN1 adapter) |
| DIN Rail Adapter | Q6DIN1 |
| Mounting Hardware Included | 4× M4 x 14 base unit mounting screws |
| Compatible CPU Types | Q Series CPU, PC CPU, Motion Control CPU |
| Compatible Modules | I/O modules, analog modules, positioning modules, special function modules |
| Programming Software | GX Works2, GX Works3, GX Developer |
| Certifications | UL, cUL, CE |
| Base Unit Type | Main Base (not extension) |
We warranty all items for 30 days from date of purchase.
Other Details
We warranty all items for 30 days from date of purchase. If you experience any issues with your item within this period, please contact us and we will work with you to resolve the problem. This warranty covers defects in functionality but does not cover damage caused by misuse, improper installation, or normal wear and tear.Product Videos
Custom Field
GTIN 679523686161
Manufacturer Mitsubishi
Part Number Q38B
Controller Platform MELSEC-Q (QnU)
Shelf E-6 Tub 3
Model Q38B
MPN Q38B
Type PLC Chassis
