Mini Null Modem Adapters
- Compact null modem serial connection
- Provides "cross-over" connection for serial devices>
- Available in Female-Female, Male-Female and Male-Male
General Description
Use these handy adaptors to join serial devices together. These "cross over" the transmit, receive, and control lines to allow the RS-232 ports of two PCs to communicate with each other. They can be used in other similar scenarios as well. The compact size of these adapters makes them ideal for tight spaces. These are available as Female-Female, Male-Female, and Male-Male adapters. The same functionality is available in null modem cables as well.
Product Documents
| Part # | Description | PDF Drawing |
|---|---|---|
| MGCNM9FF | Null Modem Adapter, DB9 Female-Female | 
|
Null Modem Adapter, DB9 Female-Female
For each of these null modem adapters, the pin mapping is as follows:
| Signal | DB9 Pin | DB9 Pin | Signal |
|---|---|---|---|
| Receive | 2 | 3 | Transmit |
| Transmit | 3 | 2 | Receive |
| DTR (Data Terminal Ready) | 4 | 6, 1 | DSR (Data Set Ready), Carrier Detect |
| Ground | 5 | 5 | Ground |
| DSR (Data Set Ready), Carrier Detect | 6, 1 | 4 | DTR (Data Terminal Ready) |
| RTS (Request to Send) | 7 | 8 | CTS (Clear to Send) |
| CTS (Clear to Send) | 8 | 7 | RTS (Request to Send) |
Note: Pin 9 is not connected on either side.
Pricing and Ordering
| Product # | Description | 1+ | 10+ | 50+ | 100+ | RoHS | Buy Now |
|---|---|---|---|---|---|---|---|
| MGCNM9FF | Mini Null Modem Adapter, DB9 Female - DB9 Female | $3.25 | $3.00 | $2.75 | $2.45 | Yes | |
| MGCNM9MF | Mini Null Modem Adapter, DB9 Male - DB9 Female | $3.25 | $3.00 | $2.75 | $2.45 | Yes | |
| MGCNM9MM | Mini Null Modem Adapter, DB9 Male - DB9 Male | $3.25 | $3.00 | $2.75 | $2.45 | Yes |
| Quantity | Price |
|---|---|
| 1+ | $3.25 |
| 10+ | $3.00 |
| 50+ | $2.75 |
| 100+ | $2.45 |
| Quantity | Price |
|---|---|
| 1+ | $3.25 |
| 10+ | $3.00 |
| 50+ | $2.75 |
| 100+ | $2.45 |
| Quantity | Price |
|---|---|
| 1+ | $3.25 |
| 10+ | $3.00 |
| 50+ | $2.75 |
| 100+ | $2.45 |
All of the above items are normally stocked. Please call us if you need to verify availability for a specific quantity, or for pricing at higher quantities. Please visit our ordering page for our ordering policies and a list of ordering methods.