Jed Micro Pty T440 User manual

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 1
T440 Simple Projector Controller user’s manual version V124 (part A)
(Ed Schoell rev: Mar 27th 2017)
The T440 is a wired (RS232) remote controller for video
projectors and flat panels, allowing simple
On-Off control, channel/source selection and optionally, audio
level control or freeze/mute functions.
Ease of setup and installation has been an important design
criterion, and this has been achieved by providing a data-base
of pre-coded projector code families in all units, so all have
identical software (which is field up-dateable). At install time,
or whenever options (or projectors) are changed in a room, the
changes are made by selecting device families with the
“Program select” hex switches on the back of the unit.
The range of keyboards at the end of this manual is coded for
identification, and this code number is set on the “Kbd Select” hex switch.
A DIP switch allows installers to quickly select several extra options.
Several variables can be setup at install time, allowing for variable warm-up and cool-down times, timeout time for
automatic turnoff, and allocation of a wide range of computer or video channels to the front-panel keys.
Except for a major code upgrade for totally new devices, a laptop is never needed at install/setup time. There is ¼
Mbyte of memory in the unit for data-base storage. A boot loader is included in the CPU, located in upper memory, so
no special programming dongles are needed; it just needs a PC with a serial port (or a USB to serial adaptor.)
Operation of the T440
A number of coloured LEDs are associated with keys, and these are steady or flashed to signal to the user the current
state of the system. Pressing keys moves the operation through these various states.
There are two groups, or “styles” of keyboards:
•Separate ON and Channel keys: This has one Green, ON key and Blue, Channel keys (Video, Computer).
In rev 22, it is possible to toggle between two computer or two video channels with either key; and
•Combo On/Channel keys: This group has one or three Green keys which are marked with a Channel function as
well as “/ On”.
Table of Contents
Operation of the T440 1
Rear view and T440 connections 3
Setting up the T440 switches 4
Setting keyboard code 4
Selection switch for options 4
Selection of program/projector 5
Setting of T440 constants 5/6
Code 6 two-key kbd setup 7
Key masking with Constant:4 7
Screen control (relay) interfaces 8
USB Sw/Power ON relay interface 8
Timer/PIR in and closedown timer 9
OPT3: AUX/PIR in for rem. On/Off 9
Serial 2 access to T440 setup info 10
Factory reset of constants 11
Readout of version number 11
OPT1: Swap Video:1 & Video:2 11
OPT5: Swap Comp:1 & Comp:2 11
OPT4: Set Comp1/2, Vid 1/2 video 11
OPT7: Detection of proj. shutdown 12
OPT8: T441/T461 audio control 12
OPT8: PTN DPA-22 audio cntrl. 12/13
Configuring the T440: Proj. codes 13
Configuring the T440:Relays/USB 13
PTN WVGA2A VGA/audio/USB 14
Configurating User flags:Aspect14/17
Setting default source channel 17
Master/Slave connections 2 x T440 19
Reprogramming of the CPU 21
Wiring the T440 23
Trouble-shooting the T440 23
Keyboard codes 25
Wiring diagram 26
Jed Micro Pty Ltd
5/173 Boronia Rd, Boronia, Victoria 3155 Australia
Phone: [phone]
www.jedmicro.com.au email: [e-mail]

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 2
Off state (Blink codes)
In the OFF state, the red LED by this key glows continuously. A built-in test function is provided, which can be
actuated by pressing the OFF key in this OFF state. This sends a test signal to the connected projector and blink codes
show:
•If the red LED flashes ONCE, it indicates that communications was established correctly, and the reply was as
expected;
•If the red LED flashes THREE times, it indicates a communications error, i.e. a disconnected or powered-off
projector, or a wrongly-set “Program select” switch on the back;
•If there is NO flash, it indicates that this particular projector normally has no response in the standby state, or an
example projector has not had timing measurements done yet, so polls aren’t tried;
•After none, one or three flashes, the red LED glows continuously.
T441/T461 communications test: A second communications test is done to the optional T441/T461 audio switcher-
attenuator. If this is selected (via the Option8 switch), connected and responding correctly, the green LED by the ON
button (above or to the left of the OFF key) blinks once. (There is no blink if no T441/T461 response is detected.)
Turnon
With “Separate On Key” keyboard: Pressing the ON key starts the T440 warm-up cycle. This will send the “start-up”
code to the projector.
The green LED by the ON button will flash once per second, for the pre-set warm-up time. As well, the last used
channel will be indicated by a green LED glowing steadily by one of the blue “Channel” keys, showing what channel
command will be sent to the projector at the end of the warm-up period.
Channel pre-select: Pressing one of the Video or Computer “Channel” keys will switch the preselection to a changed
channel. The green LED by that key will then glow, while the ON LED keeps flashing.
With “Combo On-key” keyboard: Pressing any one of the several green Channel/On keys starts the T440 warm-up
cycle. This will send the “start-up” code to the projector. The green LED for the selected channel will flash once per
second, for the pre-set warm-up time.
Channel pre-select: Pressing a different green Channel/On key during warm-up will switch the preselection to a
changed channel. The green LED by that key will then flash for the rest of the warm-up period.
Warm-up
The warm-up time is preset and varies from projector family to family. The time can be altered at setup time to suit
individual models in a manufacturer’s range over a range of 1 to 159 seconds. See the following section: “Constant
setting” for instructions on how to do this.
Screen down control and Power control ON
If screen control is enabled in the “Constant setting” process, when the/an ON key is pressed, the screen “down” driver,
Relay1 (RL1 on J10) is activated, either pulsed or direct drive. Depending on the drive mode set, if a turn-off for the
“screen down” function is needed and selected, it happens at the end of the set warm-up time. (By altering the set
“warm-up” time, the screen-down time can be altered. There is no separate down time setting for the screen down in the
T440.) See the following screen mode setting instructions.
Constant:D (see later, page 6) controls Relay 3, an N-channel FET output. By default, (Constant:D=0), Relay3 tracks
Computer2 (Used by the JED 439 switcher). If Constant:D =1, Relay 3 is actuated by the On key (and Off by the Off
key) … this can be used to turn on external audio equipment (powered speakers, etc) via an isolation relay, such as
Boolean Engineering’s “Easyswitch”. The two screw terminals on the Easyswitch connect to the RL3 and Gnd on the
T440, J11. See: http://www.booleanengineering.com/expeasy/ It can also be used for 12v triggers to screens or screen
casings. Connect the “+” of the screen to +12v and “–” to Relay 3.
Run mode
At the end of the warmup time, the selected channel LED will then flash for a short “lockout” period, and the chosen
“channel select” command is sent to the projector. If a “volume” key is included on the keyboard, and an absolute
volume mode is provided, a volume setting command is then sent to the projector (or T441/T461, if that is in use) as
well. This lockout period is variable, and is preset in the internal tables.
Pressing a different channel key will send the appropriate code to the projector, (and also an associated volume level, if
absolute volume mode is used). The selected channel green LED will then flash for the same “lockout” period as above.

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 3
Volume control (and two-key mute)
On a keyboard with Volume up/down keys, “volume up” and “volume down” messages are sent to the projector as keys
are pressed. (In some cases, two, three or more “Volume Increment/Decrement” messages are sent with each key press,
so that off to full volume takes typically 20 to 30 key presses, rather than 63 to 100 which might be needed to cover the
0-63 or 0-100 range sometimes used.) The volume keys also auto-increment/decrement if held down.
If the projector control is “absolute” (i.e. an absolute setting is sent) only one volume message is sent for each button
push (or pulse from the auto-inc/dec function), but the actual value sent could be incremented by a number larger than
one, again, to limit the range from 0-20 to 0-30. If a T441/T461 audio controller is used, its range is 0-20.
If absolute control is used (by projector or T441/461) the last volume used for a channel is remembered after the
projector is turned off, and restored at the next ON. As channels are changed, the volume is saved on exit and restored.
Two-key mute mode: If both volume keys are pressed together, “mute” mode is entered, and picture and sound mute
messages are sent to the projector (and T441/T461, if used), and the current channel LED commences a slow flash.
Normal picture and sound are restored by pressing the channel key (or the ON key). (Not all projectors allow this.)
Mute, Freeze and Aspect keys
When the MUTE key is pressed, the projector goes into picture mute mode, and the current channel LED commences a
slow flash. (No audio is assumed in a system with a Freeze/Mute keyboard). Pressing the MUTE key again, or the
current channel key, exits “mute” mode, and the channel LED returns to a continuous glow. (Some projectors don’t
have absolute modes for “mute” so pressing the key just toggles the projector mute mode without any blinking LED
display.)
When the “Freeze” key is pressed, the picture is frozen (if the feature is supported by the projector). Pressing it again
exits “freeze” mode.
Pressing the “Aspect” key toggles between 4:3 and 16:9 ratios, if absolute setting mode is available, else it rolls
between a number of ratios, whatever the sequence provided by the display device provides.
Closedown
When the OFF key is pressed, the following actions happen:
•The projector is sent the “Powerdown” message;
•If enabled, the screen-up Relay2 (RL2 on J10) actuates, either as a single pulse or a direct ON for the length of the
cooldown period, or till a pulse on RL1 stops the screen drive;
•The Power On Relay3 turns OFF; and
•The OFF red LED starts flashing once per second.
At the end of the Cooldown period, the system returns to the OFF state above. (The actual Cooldown period (and hence
screen-up time) can be programmed by a constant setup (see later).
Rear-view of the T440
Looking at the back of the T440 shows the connections
and the setup switches.
T440 Connections:
Across the bottom, right-to-left, are Phoenix plug-in
screw terminals for wiring to the outside world:
•Projector RS232 serial connection: same pinout as
the T460, with Ground, Tx (data out), Rx
(projector reply) and CTS (optional, infrequently
used);
•Auxiliary RS232 serial connection: used for
download and serial connections, e.g. to the
T441/T461 audio controller;
•At the far left is the power input, in the range of 9 to 25 volts. Current is under 50mA but depends on voltage;
•Optional: Relay drive out, intended for screen control. Optional: IR transmitter output: (Code 1 keyboard only);

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 4
At the top left is three-terminal connection J3, with two inputs, one for the PIR input the other is unallocated at the
moment. Next to it is connection J11 for Relay 3, a “power on”, USB switcher or aux screen/dipper relay drive.
Just below this input connector is a
CAT5 socket. This is a quick wiring
option for the communications
/power/PIR to the T467 “cable-top” box
which provides terminations to the
projector (DB9), power in socket, and
PIR screw terminals. (It is NOT an
Ethernet connection.)
T440 Switches:
•One hex switch (at the top-right)
selects the keyboard type by code;
•Two hex switches provide
“Program Select” to select an entry
in the data-base of projector/flat
panels. It needs a screwdriver to
select codes from 00 to FF;
•An 8-position “Option” switch,
allows installers to select options,
e.g. alternate video source, auto-
send of pixel align, T441/T461 use,
etc.;
•One push-button “Reset” switch.
Setting up the T440 switches
Selection of keyboard type
This is done using the “Kbd select” hex switch, and selecting the code of the keyboard style. This allocates the key
closures to T440 functions, and makes the T440 design extremely flexible in application. At the end of this manual is a
table of keyboard drawings and their codes. The code number below each keyboard is simply entered onto the switch by
setting the arrow on the switch to a code with a small screwdriver. Normally, this is pre-set at the time of manufacture,
and would not need to be altered in the field.
Selection of Options
An 8-switch options selection switch (SW4) is used to select install-time options.
NOTE: The OFF (default) position is with all sliders DOWN (by the switch numbers and green connectors).
Moving a switch to the ON position selects the option, as defined in this table:
Switch On Function Switch On Function
OPT1 Swap Video 1 and Video 2 sources, i.e. use
S-Video or HDMI as main “video” source.
OPT5 Swap Computer 1 and Computer 2
sources.
OPT2 Set automatic sending of Auto Pixel Align after
any Computer key selection.
(Time after Computer command is Constant:7)
OPT6 Use S-Video instead of HDMI where
available. (For some devices S-Video is
default, and OPT6 selects HDMI.)
OPT3 Off: allows pre-setting of channels, etc. prior to
use of Timer/Card Swipe/PIR auto/remote start
On: Lock out keyboard and use auto/remote ON
OPT7 Enable projector state sensing, and turn
T440 off if OFF or COOLDOWN sensed
OPT4 On: Enables toggle mode between, e.g. two
computer or two video channels when there are
no specific 1 or 2 keys.
OPT8 Use T441/T461 for audio switching &
control. (Also allows for setting DPA-22
amp.)

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 5
Selection of the program/projector
SW2 and SW3, the “Program select” switches shown in the T440 rear view, are normally used to select a family and/or
make of projector. These switches are read on Reset (pressing the “Reset” switch) or power on, and determine what
codes are sent to the projector as front panel keys are pressed.
(In this documentation, when a code “2A” for example, is quoted, it means the first hex digit, “2” is set onto the left-
hand switch, SW2, and the second hex digit, “A” is set onto the right-hand switch, SW3.)
Codes from 00 to DF are used for projector program selection: use the projector tables in the “Projector data” section of
this manual to choose a program code and set it into these two switches.
(Codes from E0 to FD are used for setting pre-set constants (such as warm-up time), code FE is used for a “Restore
factory pre-sets”, and FF is used as a test and diagnostic mode.)
Setting of constants in the T440
The T440 has built-in non-volatile memory (i.e. it maintains its contents even if power goes down).
This memory is used to save the series of constants (typically set or adjusted at T440 install time), for example:
•Altered Cooldown and Warmup and AutoPixelAlign delay times;
•Select a particular non-default channel (e.g. a Component or HDMI channel in place of the default Composite
Video);
•Set the timeout for the internal timer used to turn off the projector if everyone leaves the room; or
•Enable and set the mode of operation for the screen control relay outputs.
The constant setting process
To set a non-volatile constant, several steps are done in sequence:
1. Setup the DIP switch called “Options” to a value to be loaded into that constant;
2. Setup the “Program select” hex switches to address the constant. The constants are addressed by setting the
switches to a number in the range E0 to FD, allowing for 30 constants. The meaning of a particular constant
and its hex (switch) address is listed in the following tables; and
3. Press the push-button “Reset” switch.
If this is done properly, the green LED in the ON position will glow for 2 seconds and then turn off. No other
LEDs will be on, in this constant-setting mode, even after the 2-second blink. The 2-second blink indicates that
the constant was setup and saved correctly.
Setting a value into the Options switch
A decimal value in the range 0 to 159 can be set on the “Options Switch”. The switch is
divided into two groups of four switches.
ON is the position with the slider moved UP, and is shown in WHITE in these drawings.
The first (right) four (switches 5, 6, 7 and 8) are coded into the “units” part of the number as a
BCD setting from 0 to 9.
The second (left) four (switches 1, 2, 3, and 4) are coded into the “tens” part of the number,
extended to set a value from 0x to 15x. NOTE: This means value:11 is set by OPT4 and OPT8 both ON, (NOT hex
0B, OPT5,7 & 8).
ON
12345678
Value
0 0
ON
12345678
Value
0 1
ON
12345678
Value
0 2
ON
12345678
Value
0 5
ON
1 2 3 4 5 6 7 8
Value
0 9
ON
12345678
Value
2 5
ON
12345678
Value
3 7
ON
12345678
Value
9 9
ON
1 2 3 4 5 6 7 8
Value
159
ON
1 2 3 4 5 6 7 8
Value
1 0
ON
1 2 3 4 5 6 7 8
8 4 2 1
Units
8 4 2 1
0 0 0 0
Tens

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 6
Program select switch setup for constant setting
Constant
Program select
switch setting
Usage Range for
units
Comments
SW2 SW3
Constant:0 E 0 “Computer 1” key
message
1->20 Main, or “Computer 1” key
Constant:1 E 1 “Computer 2” key
message
1->20 Second, or “Computer 2” key
Constant:2 E 2 “Video 1” key
message
1->20 Main, or “Video 1” key
Constant:3 E 3 “Video 2” key
message
1->20 Second, or “Video 2” key
Constant:4 E 4 Disable keys Bits mask Comp 1 & 2, Video keys, val. = 1, 2, 4
Constant:5 E 5 Warmup time 1->159 seconds
Constant:6 E 6 Cooldown time 1->159 seconds
Constant:7 E 7 AutoPixelAlign
time delay
1->159 seconds (after Computer message), Defaults
to 30 sec. if value is 0
Constant:8 E 8 Closedown timer 0->15 hrs, 54 mins
in 6 min steps
“01” = 6mins, “45” is 4 h, 30 m.
Factory Default of “00” sets 30min.
Constant:9 E 9 Screen relay mode
setting
0, 1= one pulse, 2, 3= 2 pulses, 4= direct drive, 5= 1 relay.
Adding 10 sends commands to T462 via Ser2 (10, 11 … 15)
AS WELL. Adding 20 sends screen commands to T462
ONLY, allowing on-board relays to be used for switcher
control. Default is 1 pulse mode to suit ScreenTechnics.
Constant:A E A Lower TV channel
“0” assumed if not set to value
Constant:B E B Upper TV channel
“10” assumed if not set to value
Constant:C E C Enable/start/stop
mode setting for
key/timer/Aux or
PIR input.
See Page 9/10 for
detail.
(OPT3 switch OFF is normal, ON enables these functions.)
0= Aux-In close starts on last input (keyboard ON
disabled);
1= Aux-In close starts, PIR-In stops;
2= Aux-In close starts e.g. swipe card reader, pushbutton;
3= Aux-In enables ON button e.g. from key-switch;
4= Aux-In Starts & Stops, from an external timer contact;
5= PIR starts, closedown timer stops;
6= PIR starts, PIR extends On time, closedown timer stops.
7=Aux-In pulse starts, Aux-In stops from ext. push button.
Constant:D E D Control of Relay3
439 / Pwr. control
0= Relay3 tracks Computer2, 1= Relay3 On/Off on Power
up/down (e.g. to operate audio amp / casing / dipper)
Constant:E E E TV channel cmd. 0= Use DTUP/DTDW, 1=Use CHUP/CHDW
Constant:F E F Audio system &
switcher options
via SER2
00=T441/T461, 11...18=PTN DPA-22, 20=WVG2A
24: AVlink HRM-2214, 25: AV link MRM-701, 30/31:
Lightwave, 35: APart Concept1.
Constant:10 F 0 RS232 Relay 1 …
8 control via
second serial port
sending On/Off
commands to
T441/T461or
On/two relays selected by high/low nibble for Computer 1
Constant:11 F 1 On/two relays selected by high/low nibble for Computer 2
Constant:12 F 2 On/two relays selected by high/low nibble for Video 1
Constant:13 F 3 On/two relays selected by high/low nibble for Video 2

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 7
Constant
Program select
switch setting
Usage Range for
units
Comments
SW2 SW3
Constant:14 F 4 JED 439 USB
switcher
On/two relays selected by high/low nibble for TV
Constant:15 F 5 On-board Relays 1
… 3 selected by
numbers 1 … 3 in
low nibble of
constant. (Use IR
pin for screen
control or send to
T462. See $F9.)
On-board Relay selected for Computer 1 (for switcher)
Constant:16 F 6 On-board Relay selected for Computer 2 (for switcher)
Constant:17 F 7 On-board Relay selected for Video 1 (for switcher)
Constant:18 F 8 On-board Relay selected for Video 2 (for switcher)
Constant:19 F 9 On-board Relay selected for TV (for switcher)
(Constants 1A to 1C unallocated) Unused
Special notes for Code 6 option of T440
This option allows what is normally a T430 keyboard to be used on a T440 hardware board. This would only be done
when the T440 range is not suitable because no audio control is needed. This is done to allow:
1. The second serial interface on the T440 to send serial messages to external RS232 devises such as a 439 USB
switcher; and
2. Relays for screen control (Relays 1, 2) and hardware 439/ power (i.e. audio system) or dipper control via Relay 3.
When this option is used, the switches used for channel setting option on a T430 are allowed on a T440. This table, for
a KB1 keyboard (“On” and “Off” keys only) shows what options are selected by Option switches 1, 5 and 8:
Note: In the following tables, OPT2 (Auto Pixel Align) and OPT7 (reply mode) are NOT included in the settings:
Source (single) Option settings Source (single) Option settings
Computer 1 All OPTs Off Video 1 (Comp) All OPTs Off except OPT8: On
Computer 2 All OPTs Off except OPT5: On Video 2 (HDMI or
S-Video) See part B
manual for Video 2
allocation.)
All OPTs Off except OPT1: On,
and OPT8: On
The following table is for KB3 keyboards (“Off” and “On/Source”)
Note: In the following tables, OPT2 (Auto Pixel Align) and OPT7 (reply mode) are NOT included in the settings:
Sources (dual) Option settings Sources (dual) Option settings
Computer 1 &
Computer 2
All OPTs Off except OPT4: On Video 1 (Comp) &
Video 2 (S-Vid)
All OPTs Off except OPT4: On,
and OPT8: On
Computer 1 & Video 1
(Comp)
All OPTs Off except OPT4: On
and OPT6: On
Computer 1 &
Video 2 (S-Vid)
All OPTs Off except OPT1: On,
OPT4: On and OPT6: On
Computer 2 & Video 1
(Comp)
All OPTs Off except OPT4: On
OPT5: On and OPT6: On
Computer 2 &
Video 2 (S-Vid)
All OPTs Off except OPT1: On,
OPT4: On, OPT5: On and
OPT6: On
Note: When changing selection, you will have to press the RESET button to cause the system to read the
switches, and cycle the system between the choices (with the ON button) to make sure they are setup, and then
press the OFF button to save the selections.

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 8
Key masking using Constant:04
This option allows individual keys to be masked off if they are not needed in a particular install. (This might be if a
“portrait” T440 is needed, but not all three channels are needed.) Channels correspond to bits in Constant:04 as per the
following table. Setting a bit to “1” will disable that key. It is only available for keyboards with two or three channels:
single channel controllers don’t need it. One or two bits can be set at the same time: don’t set any more than ONE less
bit as there are channel select keys, as then the T440 will do nothing!
Bit settings:
Constant: 04
Keyboard availability Bit settings:
Constant: 04
Keyboard availability
No bits set. Value = 00 All keyboards operate as
normal
Bit 0&1 set.
Value = 03 Turn off
Comp 1&2 keys.
Code 5: Only Video avail.
Code B: Only Video avail
Bit 0 set.
Value = 01 Turn off
Computer 1 keys.
Code0: Only Video avail.
Code8: Only Laptop avail.
Code 9, A: Only Video avail.
Code E: Only Video and TV.
Bit 2 set:
Value = 04
Turn off Video key.
Code 1: Only Computer avail.
Code 5: Only Computer 1&2.
Code A: Only Computer avail.
Code B: Only Computer 1&2.
Code E: Only Computer and TV
Hardware interfaces of the T440
Screen control (relay) interfaces Relays 1 and 2 (also send to T462 relay box)
Four-pin screw terminal connector J10 is used to interface to screen control relays or control interfaces (like the
“Control” interface released by ScreenTechnics, or the Somfy ILT CD4 interface.) The interface provides:
•A Ground pin for connection to the common of a system like the CD4 or ScreenTechnics;
•A +12 volt pin to provide power for the top of isolation relays driven by the outputs;
•Relay 1, used for “screen-down” function, (or with “12v trigger” mode, down and up); and
•Relay 2, used for “screen-up” function.
The Relay 1 and 2 lines are driven by a 10 A, 60V N-channel power FETs, which provides a low resistance to ground
when turned on. These lines can connect to a CD4 or Screen-Technics controller, simulating a switch connection to
common ground. (Don’t use the 12 volt power connection with these two screen controllers.)
Screen relay mode setting
Constant:[9] holds a number, setting the screen control mode, shown in the following table. For timed drive, screen
down time is set by “Warm-up time”, set by Constant:[4]. Screen up time is set by “Cool-down time” settings, set by
Constant:[5].
If “10” is added to the constant, serial commands are sent to a JED T462 plugged into the second serial port as well.
(This was added because some screen control systems (e.g. Somfy IB+ 1 AC Motor Controller WM/PCB 100-240 V
AC) do not allow the common line to the grounded to the T440 common. The older Somfy CD4 did allow this.)
Constant:9 value Function Screen Down: ON key Screen Up: OFF key
0, 1/10,11 ScreenTechnics
mode (*not
ViewMaster Pro
Use IR LED)
Relay 1 pulse starts down when ON
key pressed.
Motor stops automatically with
internal limit switches
Relay 2 pulse starts up when OFF
key pressed.
Motor stops automatically with
internal limit switches
2/12 Somfy CD4
mode
Relay 1 pulse starts down,
Relay 2 pulse stops at end of
Warm-Up time set
Relay 2 pulse starts up,
Relay 1 pulse stops at end of Cool-
down time set
3/13 Somfy CD4 &
ILT mode
Relay 1 pulse starts down,
Relay 1 & 2 pulse together stops at
end of Warm-Up time set
Relay 2 pulse starts up,
Relay 1 & 2 pulse together stops at
end of Cool-down time set

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 9
Constant:9 value Function Screen Down: ON key Screen Up: OFF key
4/14 Direct drive
mode: 2-line
Relay 1 runs “Down” motor when
on for length of Warm-Up time set
Relay 2 runs “Up” motor when on
for length of Cool-down time set
5/15*
** See also “IR LED”
below for alt. drive
Direct drive
“12v Trigger”
mode: 1-line
Relay 1 runs “Down” motor until
limit switch stops. Relay stays On
Relay 1 OFF starts “Up” motor
until limit switch stops.
* This mode assumes an opto-isolated “Trigger” screen input. Connect “+” to +12v and “-“ to Relay 1 out, both on J10
**IR LED driver (also provides a Screen trigger +5 volt driver: eg for ViewMaster Pro)
Connector J2 is optionally a drive to an IR LED transmitter. See Epson X5/X6 for details of implementation. If not
used for IR, this output defaults to send +5 volts out (which can command Screen Down) when “On” is pressed, and
pressing Off commands screen Up.
If commanding a screen, use the “Trigger” input … this is usually called “12V trigger” but we have always found it
operates down to about 3 volts reliably, so 5 volts drive is OK. The “Trigger” input usually has two lines
(labelled + and -). Connect the “+” to the +IR out connection, and the “-“ to Ground alongside.
This does NOT need a “Constant:9” setting, and can be used with user choice of relay functions on the Relay connector.
(This output can also be used for power control, actuating an optical isolated power relay, or could operate a dipper or
screen casing when relays 1 and 2 are used for actual screen control.)
Relay3 (USB/VGA switch drive, power control relay or dipper control)
Connector J11 is for Relay 3, an N-channel FET output. This is used for control of ancillary equipment.
There are two functions allocated to this relay:
Default (Constant:D=0): Relay3 tracks “Computer2” selection. This is typically to drive a USB switch controlling
which computer drives the USB port of an Electronic White-Board (ELB), (and possibly a VGA and audio switch.)
JED has a USB switching device in design, the 439. Call for details.
Selected (Constant:D=1): When the ON key is pressed, Relay3, is actuated … this can be used to turn on external
audio equipment (powered speakers, etc) via an isolation relay, such as Boolean Engineering’s “Easyswitch”.
The drive to Relay3 is turned OFF when the OFF key is pressed.
The two screw terminals on the Easyswitch connect to the RL3 and Gnd on, J11.
See: http://www.booleanengineering.com/expeasy/
It is also possible to drive a normal magnetic or opto-isolated zero-crossing 240vAC relay from this output, by
connecting the positive end of the relay to the +12 volts connection on power input, connector J7.
Projector Dipper / Aux screen or casing control: This can drop and raise a ceiling projector dipper or a screen casing.
Note: If the dipper or casing needs two relays pulsed for Down and Up, use a JED T462 Opto to relay converter.
Closedown Timer and PIR (Passive Infra-Red) input for automatic turnoff
Connector J3 is used as two contact-close/open inputs.
A PIR infra-red “people-detector” senses whether all the class and presenter has left the building, leaving the video
equipment running.
The time-out is set as Constant:8. If left at the default of 0, the default time of 30 mins (setting of 05) is assumed.
This default was first introduced in rev 017. No timeout is actioned UNLESS J3 “PIR In” is grounded either via
a piece of wire or a PIR “normally-closed” relay contact.
The number placed into Constant:8 is a time-out count of 6-minute intervals, and a Constant:8 value of 10, for example,
is one hour. The maximum count is 159, i.e. 15 hours and 54 minutes. (9 x 6 mins= 54 mins)
This timeout is reset by any key operation, i.e. a channel change, a volume, mute or freeze setting, or even re-pressing
the current channel button or the ON key.
The timeout only operates when the input on the PIR pin is shorted to ground by the NORMALLY-CLOSED relay
output of the PIR detector. When the PIR senses a person in its sensor beam, the relay opens, and the PIR input pin is
pulled up by a resistor on the T440. This clears the counter in the same way a key-press does, and the counter restarts.

T440 User’s manual Part A, © JED Micro Pty Ltd 2015 Page 10
Test mode: Dialling FF (hex) on the code switches and pressing “Reset” enables a test mode where the red “OFF” LED
shows the PIR input state, and the Green LED above it (normally On or Video) follows the Aux input state. As you
walk around the room, the LED shows the area covered, and the mount angles can be adjusted to the normally occupied
area.
Note: This function can be used without the PIR, just as an OFF-timer. When the timer is about the close the
system down, the current channel LED and the OFF LED flash alternately for 30 seconds before closedown.
Pressing the current channel key will cancel the timer and restore operation for a further timer preset period. If
using without a PIR, the PIR screw terminal must be shorted to the Gnd screw terminal via a short piece of wire.
OPT3: AUX/PIR input for remote enable/start/stop mode setting for key/timer/PIR in
There is a number stored in Constant:C which is used to determine the mode for external control inputs into
Connector J3’s Aux input is for auxiliary inputs, e.g. a card swipe reader, key switch, a programmable timer or a simple
“Push-to-start” customer push button for system enabling or starting (and optionally, stopping) Constant:C also controls
use of the PIR input to Connector J3 to automatically start projector operation (and optionally continue it, if there are
repeated PIR pulses).
NOTE: These functions are only enabled when OPT3 switch is turned ON.
If this switch is turned OFF, the T440 ON keys(s) can be used, allowing easy setup of default channels and other
testing. Then turn OPT3 switch ON to engage these control functions (and disable the ON key(s)). After an Aux/PIR
initiated turn-on, the starting channel is the saved, (last used) one before turnoff.
The value set into Constant:C determines these remote enabling and control functions (only with OPT3 = ON):
•Constant:C = 00: (Default): Switch-ON mode, either a keyboard ON key or an external push button to AUX:
This modes allows an external contact closure wired into the J3:AUX terminal to operate exactly the same as
pressing the “ON” keyboard key. This could be a customer “Push-to-start-show” switch.
The projector turns OFF when either the OFF button is pressed or, if used, the PIR and the internal Closedown
timer (set at Constant:8) times out.
•Constant:C = 01: Switch-ON/OFF mode, either keyboard ON/OFF keys or external push buttons to AUX
and PIR: Same as 00 above, except OFF can be either keyboard OFF key or contact close on PIR input;
•Constant:C = 02: Switch-ON mode, no keyboard ON allowed (eg security card reader):
This modes allows an external contact closure wired into the J3:AUX terminal to operate exactly the same as
pressing the “ON” keyboard key. This could be a customer “Push-to-start-show” switch, a contact closure from a
RFID, a Swipe-card reader or a Dallas security key/button scanner or a key-operated switch (in the mode where
operating the switch momentarily “ON” starts the projector. (Input sources can be changed on the keyboard when
the projector is running.)
The key/switch input can be turned OFF and removed and the projector does NOT turn OFF immediately, in this
mode. The projector turns OFF when either the OFF button is pressed or, if used, the PIR and the internal
Closedown timer (set at Constant:8) times out;
•Constant:C = 03: Switch-Enable mode: This mode allows an external contact closure wired into the J3:AUX
terminal to ENABLE the “ON” keyboard button(s). (The J3:AUX contact can be turned OFF after the ON button(s)
press, (i.e. the external key can be turned OFF and removed) and the projector does NOT turn OFF immediately in
this mode.) The OFF LED blinks off momentarily every 5 seconds in this mode while disabled, and has no blinks
in the enabled state.
The key/switch input can be turned OFF and removed and the projector does NOT turn OFF immediately, in this
mode. The projector turns OFF when either the OFF button is pressed or, if used, the PIR and the internal
Closedown timer (set at Constant:8) times out;
•Constant:C = 04: Switch/Timer On/Off mode: This mode controls both the ON and the OFF from the J3:AUX
terminal. Typically this allows a remote switch (e.g. the output contact of a small LCD timer such as the JED
“460-Timer-12V” unit) or an external ON/OFF switch to control the whole ON and OFF operation, not just the
ON function. The PIR input and the internal Closedown timer does NOT operate in this mode.
The T440 keyboard is still operational (even with OPT3 ON), so pressing ON in the OFF-state will turn the
projector ON manually, and the OFF key will turn it OFF manually. If a programmed ON cycle occurs when it is
already ON, it remains ON, but will turn OFF automatically if the timer turns it OFF before it is manually turned
OFF. If the timer had turned it ON, the OFF key will turn it OFF, terminating a cycle. It will stay OFF until the