Digitrax PM42 Manuale utente

PM42

Power Manager For 4 Independent

Power Su -Districts

'(%&

nCost effective power management for 4 power sub-districts.

nShort circuit management or auto-reversing for each sub-district.

nShort circuit management increases layout reliability by preempting booster

shutdown when a short circuit is detected by the PM42. This minimizes dis-

ruptions to operations by automatically restarting layout operation when the

short circuit is cleared.

nUser selectable short circuit detection sensitivity lets you adjust the PM42 to

optimize operation with other equipment on your layout.

nAuto-reversing manages polarity mismatches on reversing track sections.

nTrains move through reversing sections on your layout automatically, without

manually throwing electrical toggle switches or adding another booster.

nConnect your PM42 to LocoNet & transmit information to your LocoNet

system.

nNo locomotive wiring modifications needed.

nAn external power supply is needed to run the PM42 (12-18V AC or DC

125mA minimum output). Digitrax PS14 power supply is sold separately

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All Scales

Short Circuit Management or

Auto Reversing

1.0 Introduction 2

2.0 Terminology 2

3.0 PM42 Operation 2

3.1 Short Circuit Management 2

3.2 Auto-Reversing 3

4.0 PM42 Wiring 4

5.0 PM42 Option Switch (OpSw) Set Up 9

5.1 PM42 Trip Current 10

5.2 Setting the Short Circuit Sensitivity of the PM42 11

5.3 Setting the PM42 for Auto-Reversing Operation 12

6.0 Using your PM42 on LocoNet 12

6.1 Setting the PM42’s board address: 12

7.0 Troubleshooting 13

8.0 Warranty and Repair Information 14

9.0 FCC Information 14

PM42 Power Manager

Instruction Manual

Table o Contents

Digitrax, LocoNet, Super Empire Builder, Super Chief, Zephyr, Radio

Equipped, AutoReversing, FX, UniVersal Consisting, ump, and others are

trademarks of Digitrax, Inc.

Digitrax, Inc. is not responsible for unintentional errors

or omissions in this document.

This manual is copyright Digitrax, Inc. 2004-2013

Digitrax Manuals & Instructions are updated periodically.

Please visit www.digitrax.com for the latest version of all manuals.

1.0 Introduction

The PM42 can control 4 independent power sub-districts that can each be set

up as either a "Short Circuit Manager" (default) or an "Auto-Reversing

Controller." Each of the 4 sub-districts can be set for slow, regular, faster or

fastest short circuit management depending on the needs of the user. A separate

booster can power each of these sub-districts or multiple boosters can power

any combination. Each PM42 requires a 12 to 18V AC or DC 125mA power

supply (sold separately such as Digitrax PS14). One power supply (125mA per

PM42) can power more than one PM42 as long as it provides 125mA per

PM42 and is not used to power any other device. DO NOT share a power sup-

ply between your PM42 and any command station or booster on the layout.

Digitrax does not recommend sharing a power supply between one or

more PM42s and any other device on the layout.

Analog operation or zero stretching will adversely a ect booster or PM42

detection times or auto-reversing and short circuit detection.

2.0 Terminology

Power District or District: The power wiring, components and equip-

ment attached to that wiring that are driven from a single properly

isolated booster. In the case of the PM42 a district is a part of the

layout that is double gapped at both ends and powered by a single

booster.

Sub-district: A subdivision of a district. With one PM42, you can create

4 sub-districts. These 4 sub-districts can all be within one district

district.

Section: One fourth of a PM42. Each PM42 is divided into 4 sections.

We call these Section 1, Section 2, Section 3, and Section 4. Each

section of a PM42 can be set up either for short circuit management

or auto-reversing.

3.0 PM42 Operation

3.1 Short Circuit Management

When the PM42 detects a short circuit, it will shut down the sub-district where

the short occurs. The "SUB-DISTRICT STATUS" LED for the sub-district with

the short circuit will light red. The other sub-districts will continue to operate.

PM42 reconnection or automatic restart attempts may cause brief power inter-

ruptions to the booster output if the short circuit is not cleared.

The PM42 offers four settings for short circuit detection sensitivity. These four

settings let you optimize your PM42 for operation with other equipment you

use on your layout.

When a short circuit occurs on any layout, the voltage at the booster will col-

lapse. The purpose of the PM42 is to preempt the booster shutdown to mini-

mize disruptions to layout operations by automatically re-starting the layout

when this happens. In most cases, you will not notice any power interruption in

the operation of DCC equipped locomotives. This is because most DCC

decoders store energy to keep their CPUs alive in case of brief power interrup-

tions and the inertia of a moving locos will usually keep it moving as long as

the short does not last too long. Because power storage characteristics vary

from decoder to decoder, some are more sensitive to short circuits than others.

To compensate for more sensitive decoders, the PM42 can be set for faster or

fastest short circuit detection. Slower short circuit detection may be a better

choice if you are running locos with lots of incandescent lamps or lighted pas-

senger cars because when you turn these on, there is a brief current spike that

may be indistinguishable from a short circuit to the system.

3.2 Auto-Reversing

When a train enters a PM42 reverse section sub-district that is set up for "Auto-

Reversing" and there is a polarity mis-match, the PM42 will automatically

change the polarity of that sub-district and the train will continue to run

through the reversing track section. The "SUB-DISTRICT STATUS" LED for

that sub-district will light red or go off, depending on the polarity needed to

correct the auto-reversing polarity mis-match.

When auto-reversing occurs on the layout the direction of travel of non decoder

equipped or "conventional" locos WILL be affected depending on where they

are on the layout and on which part of the track has its polarity reversed to

allow for auto-reversing. We recommend that analog locos not be run on

any layout that is using auto-reversing because they may suddenly change

direction when track polarity is changed by the auto-reversing eature.

Since the PM42 operates "downstream" of the Digitrax boosters it is con-

strained by the operating characteristics of the boosters; i.e. the current avail-

able during a short circuit and the timing setup of the boosters. A correctly

wired and configured PM42 will operate before booster fault shutdown and dis-

connect any load detected as a "short circuit". The PM42 will automatically

attempt to reconnect any short circuit detected until the short circuit is cleared.

4.0 PM42 Wiring

(See TABLES I &II and Diagrams 1 & 2)

1. Before installing the PM42 on your layout, be sure that your boosters

shut down correctly when a short circuit occurs. To do this, short the

track in each power district. Use a coin or screwdriver blade across

the tracks in several locations within the district to create a short cir-

cuit. The booster in the shorted district should beep and shut down

each time you short the track, the other boosters and districts will

continue to run. Once the short is cleared, the booster that was short-

ed should automatically resume operation. If the booster does not

shut down as described, then more or heavier feeder wires or bus

wires may be necessary to correct this.

2. Connect the wires from the booster's Rail A & Rail B outputs to the

Rail A & Rail B inputs for one section of the PM42 that will be

details for each PM42 section). You can use a different booster to

drive each of the PM42's four sections if desired.

3. Wire at least one of the PM42's ground connections (Pin B or X) to

the Digitrax booster ground, common (or case) of the boosters.

4. Wire the PM42's Track Outputs A&B to the A&B rails of the track to

be controlled.

5. To make a PM42 section "AutoReversing" first, connect the "REV"

pins and adjacent "TRACK OUTPUT" pins on the 44 -pin connector

for that PM42 section as shown in Diagrams 1 & 2. Then, set the

related op switch (OpSw) for Auto-reversing. (See TABLE III for

OpSw number). See Section 5.0 PM42 OpSw Set Up.

6. Connect a 12-18V AC or DC power supply to the AC1 (Pin 3) and

AC2 (Pin C) terminals of the 44-pin connector. This powers the

PM42(s). Multiple PM42s can be supplied by a single power supply

as long as you provide 125mA for each PM42. This supply should

not power or be shared by any devices other than PM42s.

Tracks should be double gapped between adjacent power districts.

Be sure the 44-pin connector is plugged in to the PM42 with the numbered pin

labels on the component side of the board. (See PM42 Top View on Front

Cover of this manual).

* Note if Auto-reversing is not set up for any given PM42 section, do not

connect REV A or REV B Pins

TABLE I: PM42 44-pin Connector

PC Board Component Side Connections

PIN Name Connect To

1 Do Not Connect

2 Do Not Connect

3 AC1 AC or DC 12-18V Power Supply

PM42

Section 1

4 RAIL A Rail A connection to booster for PM42 Section 1

5 REV A* To make PM42 Section 1 Auto-reversing,

connect to pin E, Set OpSw 06=c

6 REV B* To make PM42 Section 1 Auto-reversing,

connect to pin F, Set OpSw 06=c

7 RAIL B Rail B connection to booster for PM42 Section 1

PM42

Section 2

8 RAIL A Rail A connection to booster for PM42 Section 2

9 REV A* To make PM42 Section 2 Auto-reversing,

connect to pin K, Set OpSw 14=c

10 REV B* To make PM42 Section 2 Auto-reversing,

connect to pin L, Set OpSw 14=c

11 RAIL B Rail B connection to booster for PM42 Section 2

PM42

Section 3

12 RAIL A Rail A connection to booster for PM42 Section 3

13 REV A* To make PM42 Section 3 Auto-reversing,

connect to pin P, Set OpSw 22=c

14 REV B* To make PM42 Section 3 Auto-reversing,

connect to pin R, Set OpSw 22=c

15 RAIL B Rail B connection to booster for PM42 Section 3

PM42

Section 4

16 RAIL A Rail A connection to booster for PM42 Section 4

17 REV A* To make PM42 Section 4 Auto-reversing,

connect to pin U, Set OpSw 30=c

18 REV B* To make PM42 Section 4 Auto-reversing,

connect to pin V, Set OpSw 30=c

19 RAIL B Rail B connection to booster for PM42 Section 4

20 Do Not Connect

21 Do Not Connect

22 Do Not Connect

**Ground (Pin B or X) must be made to booster for correct PM42 operation.

TABLE II: PM42 44-pin Connector

PC Board Non-Component Side Connections

PIN Name Connect To

A Do Not Connect

B GROUND** Connect to booster ground/case of

DB100, DB150, DCS100, etc.

C AC2 AC or DC 12-18V Power Supply

PM42

Section 1

D RAIL A Rail A connection to booster for PM42

Section 1

E TRK OUTPUT A Connect to Rail A of track to be con-

trolled by PM42 Section 1

F TRK OUTPUT B Connect to Rail B of track to be con-

trolled by PM42 Section 1

H RAIL B Rail B connection to booster for PM42

Section 1

PM42

Section 2

J RAIL A Rail A connection to booster for PM42

Section 2

K TRK OUTPUT A Connect to Rail A of track to be con-

trolled by PM42 Section 2

L TRK OUTPUT B Connect to Rail A of track to be con-

trolled by PM42 Section 2

M RAIL B Rail B connection to booster for PM42

Section 2

PM42

Section 3

N RAIL A Rail A connection to booster for PM42

Section 3

P TRK OUTPUT A Connect to Rail A of track to be con-

trolled by PM42 Section 3

R TRK OUTPUT B Connect to Rail A of track to be con-

trolled by PM42 Section 3

S RAIL B Rail B connection to booster for PM42

Section 3

PM42

Section 4

T RAIL A Rail A connection to booster for PM42

Section 4

U TRK OUTPUT A Connect to Rail A of track to be con-

trolled by PM42 Section 4

V TRK OUTPUT B Connect to Rail A of track to be con-

trolled by PM42 Section 4

W RAIL B Rail B connection to booster for PM42

Section 4

X GROUND** Connect to booster ground/case

Y Do Not Connect

Z Do Not Connect

BOTTOM ROW

TOP ROW

Diagram 1: PM42 Wiring Examples Diagram 2: PM42 Wiring Examples

44 Pin Connector

Booster 1, Rail B Pins 15, 19

Booster 1, Rail A Pins 12, 16

PM42 Section 1, Rail A, Pin E

Example A

1 Booster - 4 Short Circuit Managers

Example B

2 Boosters - 4 Short Circuit Managers

PM42 Section 1, Rail B, Pin F

PM42 Section 2, Rail A, Pin K

PM42 Section 2, Rail B, Pin L

PM42 Section 3, Rail A, Pin P

PM42 Section 3, Rail B, Pin R

PM42 Section 4, Rail A, Pin U

PM42 Section 4, Rail B, Pin V

Booster 2, Rail B Pins 7, 11

Booster 2, Rail A Pins 4, 8

Factory Settings (DEFAULT)

ADHJ MNST WYZ

BOTTOM ROW

12 56 910 13 14 17 18 20 21 22 TOP ROW

44 Pin Connector

Rev PM42 Section 1, Rail A, Pins E & 5

Rev PM42 Section 2, Rail A, Pins K & 9

Rev PM42 section 3, Rail A, Pins P &13

Rev PM42 Section 4, Rail A, Pins U &17

Rev PM42 Section 1, Rail B, Pins F & 6

Rev PM42 Section 2, Rail B, Pins L &10

Rev PM42 Section 3, Rail B, Pins R &14

Rev PM42 Section 4, Rail B, Pins V &18

Example C

1 Booster - 4 Auto-Reversing Section

Booster Rail B Pins 7, 11, 15, 19

Booster Rail A Pins 4, 8, 12, 16

Booster 1Booster 2

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

Booster

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

12-18V AC or DC

125mA

Power Supply

12-18V AC or DC

125mA

Power Supply

Booster

Booster Rail B Pins 7, 11, 15 ,19

Booster Rail A Pins 4, 8, 12, 16

Booster 2 Booster 1

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

12-18V AC or DC

125mA

Power Supply

PS14

TRACK OUTPUTS

NOTE:

To complete auto- reversing set up

you must wire the layout as shown here

and also set the appropriate OpSw

to activate auto-reversing in your PM42.

See Table IV for appropriate OpSw.

ADHJ MNST WYZ

BOTTOM ROW

12 56 910 13 14 17 18 20 21 22 TOP ROW

44 Pin Connector

Booster 1, Rail B Pins 15, 19

Booster 1, Rail A Pins 12, 16

PM42 Section 1, Rail A, Pin E & 5

Example D

Booster #1 - 2 Short Circuit Managers

Booster #2 - 2 Auto Reverse Controllers

PM42 Section 1, Rail B, Pin F & 6

PM42 Section 2, Rail A, Pin K & 9

PM42 Section 2, Rail B, Pin L & 10

PM42 Section 3, Rail A, Pin P

PM42 Section 3, Rail B, Pin R

PM42 Section 4, Rail A, Pin U

PM42 Section 4, Rail B, Pin V

Booster 2, Rail B Pins 7, 11

Booster 2, Rail A Pins 4, 8

Booster 1Booster 2

Auto-Reverse

Controllers Short Circuit

Managers

12-18 VAC Pin 3

12-18 VAC Pin C

Booster Ground

Pins B and/or X

12-18 VAC or DC

125mA

Power Supply

PS14

NOTE:

To complete auto- reversing set up

you must wire the layout as shown here

and also set the appropriate OpSw

to activate auto-reversing in your PM42.

See Table IV for appropriate OpSw.

TRACK OUTPUTS

BOTTOM ROW

TOP ROW

Diagram 1: PM42 Wiring Examples Diagram 2: PM42 Wiring Examples

44 Pin Connector

Booster 1, Rail B Pins 15, 19

Booster 1, Rail A Pins 12, 16

PM42 Section 1, Rail A, Pin E

Example A

1 Booster - 4 Short Circuit Managers

Example B

2 Boosters - 4 Short Circuit Managers

PM42 Section 1, Rail B, Pin F

PM42 Section 2, Rail A, Pin K

PM42 Section 2, Rail B, Pin L

PM42 Section 3, Rail A, Pin P

PM42 Section 3, Rail B, Pin R

PM42 Section 4, Rail A, Pin U

PM42 Section 4, Rail B, Pin V

Booster 2, Rail B Pins 7, 11

Booster 2, Rail A Pins 4, 8

Factory Settings (DEFAULT)

ADHJ MNST WYZ

BOTTOM ROW

1256910 13 14 17 18 20 21 22 TOP ROW

44 Pin Connector

Rev PM42 Section 1, Rail A, Pins E & 5

Rev PM42 Section 2, Rail A, Pins K & 9

Rev PM42 section 3, Rail A, Pins P &13

Rev PM42 Section 4, Rail A, Pins U &17

Rev PM42 Section 1, Rail B, Pins F & 6

Rev PM42 Section 2, Rail B, Pins L &10

Rev PM42 Section 3, Rail B, Pins R &14

Rev PM42 Section 4, Rail B, Pins V &18

Example C

1 Booster - 4 Auto-Reversing Section

Booster Rail B Pins 7, 11, 15, 19

Booster Rail A Pins 4, 8, 12, 16

Booster 1Booster 2

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

Booster

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

12-18V AC or DC

125mA

Power Supply

12-18V AC or DC

125mA

Power Supply

Booster

Booster Rail B Pins 7, 11, 15 ,19

Booster Rail A Pins 4, 8, 12, 16

Booster 2 Booster 1

12-18V AC Pin 3

12-18V AC Pin C

Booster Ground

Pins B and/or X

12-18V AC or DC

125mA

Power Supply

PS14

TRACK OUTPUTS

NOTE:

To complete auto- reversing set up

you must wire the layout as shown here

and also set the appropriate OpSw

to activate auto-reversing in your PM42.

See Table IV for appropriate OpSw.

ADHJ MNST WYZ

BOTTOM ROW

12 56 910 13 14 17 18 20 21 22 TOP ROW

44 Pin Connector

Booster 1, Rail B Pins 15, 19

Booster 1, Rail A Pins 12, 16

PM42 Section 1, Rail A, Pin E & 5

Example D

Booster #1 - 2 Short Circuit Managers

Booster #2 - 2 Auto Reverse Controllers

PM42 Section 1, Rail B, Pin F & 6

PM42 Section 2, Rail A, Pin K & 9

PM42 Section 2, Rail B, Pin L & 10

PM42 Section 3, Rail A, Pin P

PM42 Section 3, Rail B, Pin R

PM42 Section 4, Rail A, Pin U

PM42 Section 4, Rail B, Pin V

Booster 2, Rail B Pins 7, 11

Booster 2, Rail A Pins 4, 8

Booster 1Booster 2

Auto-Reverse

Controllers Short Circuit

Managers

12-18 VAC Pin 3

12-18 VAC Pin C

Booster Ground

Pins B and/or X

12-18 VAC or DC

125mA

Power Supply

PS14

NOTE:

To complete auto- reversing set up

you must wire the layout as shown here

and also set the appropriate OpSw

to activate auto-reversing in your PM42.

See Table IV for appropriate OpSw.

TRACK OUTPUTS

LocoNet

Termination

umper

5.0 PM42 Option Switch (OpSw) Set Up

The PM42 OpSw settings are used to set up the PM42 for setting up the trip

current, short circuit management (including sensitivity), and/or auto-reversing.

Follow the steps outlined below to set up OpSws according to the TABLES

below.

Connect a DT series throttle (with battery installed) to the LocoNet connector

on your powered PM42 to read back and make changes to the PM42's option

switches (OpSws).

The factory default setting on all PM42 OpSws is "thrown" or "t". This setting

will operate each section of the PM42 as a short circuit manager.

To Change PM42 OpSw settings:

1. Enter option switch mode by pressing the "OPTION" button on the

PM42 for about 1 second and then releasing it. The green "ID" LED

and red "OPTION" LED will flash alternately to indicate that you

have entered option switch mode.

2. Connect any Digitrax DT series throttle to the PM42's LocoNet con-

nector. Note that because the throttle’s switch control mode is used

to change the PM42's OpSw settings, each time you change the

PM42's option switch settings you will also send switch commands

to the layout any time you are connected to LocoNet and the layout.

3. If the PM42 is connected to a working LocoNet (via a 6 conductor

LocoNet cable), skip to step 4 since the LocoNet termination jumper

is not needed. If the PM42 is not connected to a working LocoNet,

move the LocoNet termination jumper so that it is across both pins.

The LocoNet termination jumper is, located behind the R 12 sockets

on the PM42 board.

4. Follow the instructions for the throttle you are using to enter switch

control mode on the throttle. Select the switch address that corre-

sponds to the OpSw number you want to change. Press the "c" or "t"

button to change the OpSw setting as desired.

5. When OpSw set up is complete, press the PM42’s "OPTION" button

and the unit will exit option switch mode. If you moved the LocoNet

termination jumper in step 3 above, return it to its original position

(leave it attached to one pin so that you don't lose the jumper).

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