M495 · RTO-144 Connections

M495 - Stereo Monitor Module

Rear connector

REAR VIEW · CARD EDGE · 44 CONTACTS1Right IN 5 +2Left IN 5 +3Left IN 4 +4Right IN 4 +5Right IN 3 +6Left IN 3 +7891011121314151617Left Muted +18Right Muted +19VEE-AUDIO -25V20GND21VCC-AUDIO +25V22ARight IN 5 −BLeft IN 5 −CDRight IN 4 − / Left IN 4ERight IN 3 −FLeft IN 3 −HJKLMNPRSTULeft Muted −VRight Muted −WXYVCC-LOGIC +24VZVCC-LOGIC GNDTOP ROW 1-22: COMPONENT SIDE · BOTTOM ROW A-Z: SOLDER SIDEInputInput / outputPowerGround / chassis

Inputs and outputs

M495M495 - Stereo Monitor ModuleRight IN 5A1 1 / ALeft IN 5A2 2 / BRight IN 4A3 4 / DLeft IN 4A4 3 / DRight IN 3B1 5 / ELeft IN 3B2 6 / FRight MutedB3 18 / VLeft MutedB4 17 / UINPUTSOUTPUTSVEE-AUDIO-25 V 19 / GND 20VCC-AUDIO25 V 21 / GND 20VCC-LOGIC24 V Y / GND Z⌒ JMP.Z.20 Z↔20⌒ JMP.Y.21 Y↔21

Audio connections · RTO-144 A / B

PortSignalDirPin +Pin −Pad +Pad −
A1Right IN 5in1A1.A.1.PA.A.1.N
A2Left IN 5in2B2.A.2.PB.A.2.N
A3Right IN 4in4D4.A.3.PD.A.3.N
A4Left IN 4in3D3.A.4.PD.A.4.N
B1Right IN 3in5E5.B.1.PE.B.1.N
B2Left IN 3in6F6.B.2.PF.B.2.N
B3Right Mutedio18V18.B.3.PV.B.3.N
B4Left Mutedio17U17.B.4.PU.B.4.N

Power · bench PSU

RailStyleVoltsMax ASupplyGroundLink
VEE-AUDIONEW-250.219202
VCC-AUDIONEW250.221201
VCC-LOGICNEW240.2YZ—

Jumpers

FunctionDesignationFromTo
CTRL COMJMP.Z.20Z20
24VJMP.Y.21Y21

Source: Ward-Beck Systems - Module RTO-144 Jumper calculator.xlsx (Database tab). Pin direction is inferred from the signal name. Verify against the module schematic before wiring.

WBS Ward-Beck Systems Ltd.
Title
M495 RTO-144 connections
Drn.
make_rto144.py
Date
Oct 17 2026