M450B · RTO-144 Connections
M450B - Program / Summing Amplifier · ELCO 00-6007-015-940-002 · 15 contacts, single row
Rear connector
Inputs and outputs
Audio connections · RTO-144 A / B
| Port | Signal | Dir | Pin + | Pin − | Note |
|---|---|---|---|---|---|
| A1 | SUMMING INPUT | in | 3 | 5 | input when used as summing amp |
| A2 | PROGRAM INPUT | in | 4 | 6 | input when used as program amp |
| B1 | OUTPUT | out | 12 | 13 | — |
Power · bench PSU
| Rail | Style | Volts | Max A | Supply | Ground | Link |
|---|---|---|---|---|---|---|
| VCC-AUDIO | — | 25 | — | 1 | 8 | — |
| VEE-AUDIO | — | -25 | — | 15 | 8 | — |
Other pins
| Signal | Pins |
|---|---|
| INPUT SHIELD | 7 |
| COMMON | 8 |
| GAIN SET | 9, 10, 11 |
| N/C | 2, 14 |
Source: Ward-Beck drawing 450-04-001 iss. 2, M450, M450A, M450B connector rear view (M450B manual p. 15). Verify against the module before wiring.
WBS Ward-Beck Systems Ltd.
Title
M450B RTO-144 connections
Drn.
make_rto144.py
Date
Oct 22 2026