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The PSX-1,2,3,4 AC 1 of 6
American Hobby Distributors, 57 River Rd, Suite 1023, Essex Jct., VT. 05452 800-671-0641, info@amhobby.com
www.amhobby.com
The PSX-1,2,3,4 AC
Series
(Rev:H)
*
Intelligent, High Power AC, Solid State Circuit Breakers
Compatible with AC, TMCC and DCS
Quick Start: see Pg-6
Designed by Larry Maier
Developed by AHD
Patent Pending
Versions Available:
PSX-1AC: One Output, PSX-2AC: Two Outputs, PSX-3AC:
Three Outputs, PSX-4AC: Four Outputs
:
All Solid State Operation:
Fast, solid state design with
reliable quiet action.no clicks or sparks.
Adaptive Load Reset:
Electronically determines if the
overload is a real short or due to excess load in
sound units or lighted passenger cars.
Block Detection:
Either a photo cell or current can be used to detect a train in a
block. The photocell can turn off the block.
Over Voltage Protection:
If there is an over voltage on the track caused by a
AC System failure or other power inputs the PSX will shut down and
protect your locomotives.
Range of Current Trip Setting:
The currents can be adjusted over a range of 4.8 to
17.8 amps. Values can be set using jumpers.
Very Low Voltage Drop:
Breaker On resistance is less than 0.060 ohms, so the PSX
has a low voltage drop even at high currents. Much better than detectors that
use a diode voltage drop.
Manual or Automatic Reset:
Automatic reset of the breaker after 2 seconds. A switch
can be used for a manual reset.
Outputs for LED Indicators:
LEDs can be added to monitor the input/output power and
the status.
Output for Audio Alert:
An audible sounder can be added to the card to alert if
there is a short.
No Power Supply Needed: Board size:
is 4.75 by 2.25 inches
Flash Programmable:
Micro Processor can accept updated software if needed.
Note: The PSX-1 operates by opening one side of the two inputs leads when an overload is
sensed. If you have a situation where both sides of the input line need to be opened on an
overload, use the PSX-AR instead of the PSX-1. The PSX-1 opens the path from J1-4 to J2-2
when the breaker senses an over load. Additional power to the PSX-2, 3, & 4 is connected by
daisy chaining from J1, 1 and 2 to the next PSX J1, 3 and 4.
*
I n s t r u c t i o n s b y D o n F i e h m a n n 2 of 6
American Hobby Distributors, 57 River Rd, Suite 1023, Essex Jct., VT. 05452 800-671-0641, info@amhobby.com
www.amhobby.com
Why Divide my Layout?
(Courtesy of Kalmbach Publications)
Though Command Control offers a more realistic type of train control being able to run multiple locomotives independently on the
same track the electricity running through the rails of your layout still needs to be properly managed and distributed. Since one of
the big selling points of Command Control is that you dont need to divide your layout into individual electrical blocks for independent
train control, youre probably asking yourself, why should I do it? In addition to minimizing operating disruptions, power districts are
also a key to AC power regulation. If youre running a lot of trains, youll need to make sure your AC system can supply all your
power needs efficiently and safely. Adding power districts to your layout by using Circuit Breakers can help with that. By separating
your layout into districts, you divide the total track power available into smaller, more manageable units.
How do I Determine Power Districts?
There are really two types of power districts: those that are circuit breaker protected zones on the layout and those that have their
own independent AC Power (also breaker protected). Probably the best way to determine where to place power districts is to take a
look at the expected current draw, (Traffic), for each operating location on the layout. For example, a busy yard might have two
switchers, one or more trains on the arrival and departure tracks, another train or two passing the yard on the main, and maybe a
peddler working nearby local industries. If some or all of these trains have more than one locomotive, you could have 10 to 15
current-drawing units all competing for power in a fairly small area. Even assuming that the locomotives have efficient motors, this
type of load may be heavy enough to slow down a AC system running on a common AC System. Generally, our experience has
shown that in O if you have for a 12-14 awg buss and 18 awg feeders, that a 5 Amp system can support up to 5 0perators. Many
users overestimate the amount of power needed. Try using the PSX Series first, then if your trains start to slow down you may need
to add extra AC Power to support the concentration of trains in this location. By dividing a layout into power districts in this manner,
and using a combination of AC Power Units and/or circuit breakers, you can make the most efficient use of available power on any
mid-size or large-size layout.
PSX-1AC
PSX-1AC
PSX-1AC
PSX-1AC 3 of 6
American Hobby Distributors, 57 River Rd, Suite 1023, Essex Jct., VT. 05452 800-671-0641, info@amhobby.com
www.amhobby.com
J6 Trip Current Settings by Jumpers
J6-1-4 See Table Below
J7 Weak System Boost
J7-1 to J7-2 Open: Auto Reset
J7-1 to J7-2 Jumpered: Manual Reset (open to reset)
J7-3 to J7-4 Open Block Occupied trips at 30mA
Jumpered Block Occupied trips at 300 mA
J10 Power In: Indicator (Remote)
J10-1 + AC Power In, LED Remote
J10-2 - AC Power In, LED Remote
J11 Track Power On: Indicator (Remote)
J11-1 + Track On LED Remote
J11-2 -Track On LED Remote
D11 Voltage Limiter See Pg-3.
Power Shield X-1, 2, 3, 4 AC, Wiring:
Wire to the Power Shield should be heavy enough to carry the current. Size of wire depends on your scale. Too
much resistance in the wire or rails can result in faulty short sensing. At a minimum, use, 12 Awg for O and G.
Connector Description
J1 Input Power Connector
J1-1
Connections for Daisy
J1-2
Chaining to next PSX
J1-3
AC Input 2
J1-4
AC Input 1
J2 Output Power Connector
J2-1
AC Output 2
J2-2
AC Output 1
J4 Block Occupancy
J4-3 + Block Occupied Output
J4-4 - Block Occupied Output
J4-5 + Block Shorted Output
(A)
J4-6 - Block Shorted Output
(A)
J5 Status Outputs (Remote)
J5-1 + Status LED Remote
J5-2 - Status LED Remote
J5-3 + Remote, power on output
(A)
J5-4 - Remote, power on output
(A)
(A) =Transistor Type Open Collector Output
Connector J6
Terminal #1
Terminal #2
Terminal #3
Terminal# 4
4.8 Amps
None
None
None
None
8.0 Amps
Connect
Connect
12.2 Amps
Connect
Connect
15.4 Amps
Connect
Connect
Connect
Connect
N o t e : T he s ma l l b l a c k s c re w t e rmi na l s s ho w n i n p i c t ure a re o p t i o na l a c c e s s o ri e s a va i l a b l e f ro m yo ur d e a l e r. T he l a rg e g re e n
i np ut / o ut p ut t e rmi na l s c o me w i t h uni t s . G e ne ra l l y t he s ma l l t e rmi na l s a re no t ne e d e d a s mo s t o f t he s e a re o ne t i me c o nne c t i o ns a nd
a re e a s i l y s o l d e re d t o t he b d . U s e a s ma l l i ro n ( 2 0 W - 4 0 W ) f o r s o l d e ri ng j ump e rs t o t he b d .
D11 4 of 6
American Hobby Distributors, 57 River Rd, Suite 1023, Essex Jct., VT. 05452 800-671-0641, info@amhobby.com www.amhobby.com.
Wiring Connections:
J1 AC power input connections. It can be branched out to allow multiple connections to other breakers
The Power Link makes it easier to connect to another breaker or See the diagram on previous page.
J2 Circuit Breaker output to the track.
J4-1 and J4-2 are the inputs for the photocell detector used for the stopping function. Note: Be sure there
is sufficient light above the cell to trigger the circuit. The photocell sensitivity is calibrated each time it is
armed. Silonex, NSL-6112
J4-3 (+) and J4-4 (-) are open if the block is not occupied and are connected together (up to 5 mA) if the
block is occupied. This is an opto-isolated output switch and provides no power.J4-5 (+) and J4-6 (-) are
connected together (up to 5 mA) when the breaker has detected a short circuit and open with no short.
This is an opto-isolated output switch and provides no power.
J5-1 (+) and J5-2 () are for a remote status LED. The LED is connected directly to the terminals. No
resistor is required. Off means normal Solid on means a short circuit.
J5-3 (+) and J5-4 (-) are the remote power on output (open collector transistor)
J6 Sets the current trip level. The (default) trip current is 4.8 amperes if no jumpers are installed. If J6-2
is connected to J6-1 and J6-4 to J6-3 is open, then the current trip is 8.0 amperes. If J6-4 is connected to
J6-3 and J6-2 to J6-1 is open, then the current trip is 12.2 amperes. If J6-4 is connected to J6-3 and J6-2 is
connected to J6-1, then the current trip is 15.4 amperes. See Table Pg-3.
Note:
Higher Amperages are available
upon request.
J7-1 and J7-2 are the auto/manual reset input. If the connections are open, the breaker will automatically
try to reset every two seconds. If the terminals are connected together (like a SPST toggle switch or a N/C
push button switch), then the breaker will remain off after a