Specifications
36
The KEEP-A-LIVE was designed to allow the DALLEE ELECTRONICS family
of current sensing detection devices (TRAK-DT, TRAK-DTT) to display proper
signal and occupancy indications even though there is no propulsion power in
the track. Previously, there had to be power in the track and something drawing
current in order to activate the detection devices. With the KEEP-A-LIVE
connected to the track and the 12 VDC regulated power applied to the
detection circuits all locomotives or rolling stock that normally draw current will
be detected. For simplicity of operation the KEEP-A-LIVE installs on the output
of each throttle (CAB) and acts as a pass through for that throttle. For complete
coverage, an additional KEEP-A-LIVE should also be connected to the track in
situations when no throttle is selected.
It is also necessary to provide power for the electronics. In order for the electronics to function properly it is essential that a
"regulated" power supply of 12 VDC be employed. This 12 VDC power is only for the electronics and has absolutely nothing
to do with track power. Failure to use a "regulated" 12 VDC can cause erratic functioning or actual destruction of the
KEEP-A-LIVE. For proper power supply refer to the 12VPS (Item 369).
Sample wiring is shown below. Remember, this is a PASS THROUGH device. It does not interfere with track power provided.
If you are also using a LocoMatic™ controller, connect it's input to the wires from the KEEP-A-LIVE output (shown going to
the track) and then from the LocoMatic™ controllers output to the track.
KEEP-A-LIVE
Item # 588
MO-1, momentum unit
Item # 567
Relay Contacts - electrical diagram
Relay contacts are used on most all of our Signaling Components. These are used since they are the most forgiving when
mis-wiring occurs and they provide for electrical isolation of the load to the circuit.
When the relay is relaxed the "C" Common terminal is
connected to the "N/C" Normally Closed. When the relay is
activated the "C" Common terminal is then connected to the
"N/O" Normally Open terminal. The relays used on our circuitry
contain Double contact sets indicated by section A and section
B. This is referred to as a DPDT (Double Pole Double Throw)
type of relay.
Remember - a relay is nothing more than an electrically
activated switch!
N/C - Normally Closed
N/O - Normally Open
C - Common
C - Common
SECT
A - section A
SECT
B - section B
N/C - Normally Closed
N/O - Normally Open
The MO-1 is a self-contained momentum board which has adjustable stopping and
acceleration timing that gives operators utilizing standard DC or AC track power
the ability to accomplish gradual stops and starts without manually adjusting the
throttle. The MO-1, in conjunction with a manual switch or other device such as
our Trak-DT family of detectors, will start to lower the track power when a switch is
closed or a Trak-DT type unit is activated. The timing for decreasing the track
voltage is adjustable for a fast to a long gradual stop. When the control input
becomes cleared, the MO-1 will gradually apply power to the track until full power
is restored. The MO-1 comes with a connector set that allows a direct connection
from its ‘EXP’ connector to our Trak-DT family of detectors which minimizes wiring.
The MO-1 would typically be used with a DALLEE Trak-DTT2, item 368, to
accomplish automated timed station stops with momentum. It can also be used
with our Trak-DTRL, item 566 and the Trak-DTT2, to accomplish automatic
Back-N-Forth operation providing momentum stops with reverses at the ends as
well as additional stops in between. Various other DALLEE detection circuits may
also be used. Commercial layouts may want to use it to allow trains operating from a visitor’s push button to gradually pull
out and when combined with other DALLEE components, time out to come to a gradual stop. Eliminating extra gear strain,
wheel slippage and excessive initial motor currents is an added benefit of using the MO-1. The MO-1 can handle up to 10
amperes of DC current or 8 amperes of AC current with minimal "in circuit" voltage loss. The MO-1 can be wired in various
fashions with many configurations. See our Wiring Guide (#20 or newer) or web site for some of these wiring diagrams.
1.8"w x 2
3
/
4
"l x 2
5
/
16
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