MCBH-6-MP pinout - standard instruments, Q, Q | plus
RBR standard instruments (L3, RBRquartz³ Q, RBRquartz³ Q | plus) with connectorised battery end-caps (BEC12 and BEC13) have MCBH-6-MP connectors, which can be used for connecting via USB, RS-232, or RS-485 cables, depending on the wiring selected at the time of purchase.
| Pin No. | USB | RS-232 | RS-485 |
| 1 | Ground | |||
| 2 | Power: 4.5V to 30V | |||
| 3 | N/C | From the instrument (Tx) | From the instrument (Tx-) | |
| 4 | Power: 5V | Into the instrument (Rx) | Into the instrument (Rx+) | |
| 5 | D- | N/C | Into the instrument (Rx-) | |
| 6 | D+ | N/C | From the instrument (Tx+) | |
Connectorised battery end-caps (BEC12 and BEC13)