The Tmax offers a maximum of features for controlling Piston Tanks. Tmax version 2 (V2) is equipped with a regulated power supply for
the processor, by which susceptibility to radio interference is minimized.
As the functions of this system are quite extensive, it is absolutely necessary to study the following instructions and diagrams carefully
before commencing with the setup of the system.
The Tmax System is designed to control two Piston Tanks type XP, equipped with potentiometers in addition to the micro switches of
Piston Tank type EA (AutoStop). The Tmax System can be operated via one, two or three R/C channels. However, for implementing all
functions of the system three R/C channels are necessary. This setup will require an analogue switch (3 positions: on/off/on) and two
proportional slider switches. All three channels (including the switch) must be operated via "pure" proportional channels - NOT via so-
called switch modules/decoders (such as Robbe Multi Switch).
The maximum operational depth is limited to about 1.8 meters by the pressure switch which is an integral part of the system.
Furthermore, the Tmax offers additional fail-safe features such as battery monitor and loss of Tx-signal. These safety devices make this
unit to be the most developed and reliable system currently available.
With the voltage dropping below the preset threshold value, the piston tanks will start to press water out of the cylinders. If this is the
case, the bow-sided tank will start to press out ballast water first. After a pause of about 15 sec. the stern tank will start to empty. This
sequence is to minimize the strain on the already weakened battery pack. After a low battery voltage has been identified further opera-
tion of the system will only be possible after the battery pack has been fully charged.
Threshold voltage for 6 Volt system is preset to approx. 4 Volt, for 12 Volt systems to approx. 9 Volt. Threshold voltage can be adjusted
via the potentiometer on board of the Tmax. However, a regulated power supply is recommended to achieve an exact setting.
The fail safe device controlling loss of signal is preset to approx. 2 sec. (default setting; both pins [JP1] are bridged) This time span can
be increased to approx. 5 sec. by resetting the jumper so that the two pins [JP1] are not connected (not bridged).
The yellow LEDs [LED1 and LED3] indicate that the relays have switched to the "surfacing mode". The red LEDs [LED2 and LED4] indi-
cate that the "submerge mode" is active.
The status of the system is indicated by specific blinking frequencies of the green LED [LED5].
Blinking frequencies of green LED [LED5]
OFF = emerged (fully surfaced)
1x = trimming via proportional slider switch
2x = Static Depth Controller TAES activated (only with optionally available TAES)
3x = parking on ground
4x = pressure switch activated
= battery monitor has detected low voltage (permanent blinking)
ON = loss of signal
The second green LED [LED6] serves as monitor-LED for optical evaluation of remaining main battery voltage.
The operational circuit (i.e. 6 or 12V) is equipped with a fuse protection (10A, slow blow). A second fuse is included as spare.
Switch unit Tmax can be upgraded with a Static Depth Controller, so-called TAES (Tmax + TAES = TmaxS). The TAES requires an addi-
tional outboard connection (brass tube, drilled and glued into the hull's outer walling) for the depth sensor integrated in this optional unit.
Functioning of the Tmax in combination with Static Depth Controller TAES requires PIC (software) version v2.1 (item no. 5207-
021, "yellow dot" version). The corresponding PIC version is given on the front side of the Tmax's outer relay. PIC versions v1.1
and v1.2 need to be exchanged against v2.1.
Upgrading is simple - as the PIC rests on a socket no soldering is necessary.
Tmax
V2
Item No. 1584-TMX
1584-TMX
v11-08
2
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