PXM Switch 8 x OC User manual

MANUAL
DMX/Relay
Interface 8ch
PX257-OC
PX257-RE
R

Manufacturer reserves the right to make modifications in order to improve device
operation.
tel.: [phone]
fax: [phone]
E-mail: [email protected]
Internet: www.pxm.pl
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1. General description..............................................................................................
2. Safety conditions..................................................................................................
3. Description of the connectors and control elements............................................
4. Device programming............................................................................................
4.1. Button features...................................................................................
4.2. DMX channel value for the output turning on and off.........................
4.3. DMX address......................................................................................
4.4. Reaction of the device to DMX signal interruption..............................
4.5. Complementary outputs.....................................................................
4.6. Hysteresis thresholds.........................................................................
4.7. Default settings and memory error.....................................................
5. DMX signal connection........................................................................................
6. Programming scheme..........................................................................................
7. Connection scheme.............................................................................................
8. Technical data......................................................................................................
9. Dimensions..........................................................................................................
Declaration of conformity.........................................................................................
Ver. 1.3.
PXM Marek Żupnik spółka komandytowa
Podłęże 654
32-003 Podłęże
CONTENTS

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PX257 is a device made in two versions: 8 Relay Module and Switch 8x1.3A OC. It is used for
switching on and off stage lighting and theatrical effects as well as architectural lighting
equipment using the DMX-512 signal. The module incorporates a set of 8 relays that control
on / off outputs.
The PX257 OC version is an 8-channel digital DC switch, featuring maximum single circuit
switching load of 1.3 A.
The device menu allows the user to program DMX addresses for all the output channels and
to set characteristics for the purpose of controlling electric motors.
In both versions of the device is designed for mounting on standard DIN rails in electrical
switchgear.
1. GENERAL DESCRIPTION
2. SAFETY CONDITIONS
The PX257 is a device powered with safe voltage 12-24 V; however, during its installation and
use the following rules must be strictly observed:
1. The device may only be connected to the 12-24V DC power supply (stabilized voltage) with
current-carrying capacity compatible with technical data.
2. All conductors should be protected against any mechanical and thermal damage.
3. In case of any wire damaging, it should be replaced with one of the same parameters.
4. Connection of DMX signal should be made only shielded conductor.
5. All repairs or wire connection can only be made with power supply disconnected.
6. In case of connecting output relays to 230V mains You should be double cautious because of
the risk of getting electrocuted (applies to PX257-RE).
7. PX257 should be strictly protected against contact with water and other liquids.
8. The device cannot be turned on in places with humidity exceeding 90%.
9. The device cannot be used in places with temperature lower than +2°C or higher than +40°C.
10. For cleaning use only a damp cloth.

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3. DESCRIPTION OF THE CONNECTORS AND CONTROL ELEMENTS
a) "Relay" version of PX257
b) “OC" version of PX257
DMX-512 output
display
control buttons
power supply
DMX-512 input
outputs control
diodes
DMX signal
control diode
outputs
outputs

escape
previous
next
enter
After you switch on the module, its display shows the program version for a brief moment.
To access the main menu, press „enter”, and the display will show Adr. Press „previous” or „next”
to select the appropriate menu and press „enter” to confirm your selection.
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The output will be switched on once the DMX channel is set to values over the upper hysteresis
threshold. On the other hand, the output will be switched off after the DMX channel is set to values
below the lower hysteresis threshold.
4.2. DMX channel value for the output turning on and off
4.3. DMX address
The PX257 menu allows the user to set a DMX address in the 1 - 512 range. It is possible to set an
address individually Ind for one of the eight outputs (Ad1 - Ad8) or on a group basis (ALL) for all
the eight channels simultaneously.
ON A GROUP BASIS
Using the „next” or „previous” keys, set the desired DMX address by selecting values from
1 to 512 and press „enter”. The address thus set will be assigned to the first channel, subsequent
DMX addresses will be assigned to subsequent channels.
Once an address is programmed in this manner, the individual settings for each channel are
cancelled.
enter
enter
enterenterenter
next
next
next
next
next
4. DEVICE PROGRAMMING
4.1. Button features
- goes back to the previous MENU level or discards changes made
- scrolls to the previous feature on the same MENU level or decreases
the parameter's value
- scrolls to the next feature on the same MENU level or increases
the parameter's value
- enters the next MENU level and confirms changes made

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ON AN INDIVIDUAL BASIS
Using this menu you can set a DMX address individually for the 8 outputs.
After you select Ind in the main menu, press „enter” to confirm your selection.
Using the „previous” or „next” keys, select the output you want to configure (Pr1 - Pr8) and press
„enter”.
Using the „previous” or „next” keys, select a value from the range 1 - 512, or to disable
DMX control on the output, and press „enter”.
4.4. Reaction of the device to DMX signal interruption
In the noS menu you can configure the response of the device to DMX signal interruptions.
Available options include:
Pr1, Pr2, Pr3, Pr4 - 4 built-in programs
Sc - a scene that can be programmed
on - switching on of all the outputs
oFF - switching off of all the outputs
hld - holding the last value
PROGRAM
In order to configure a program, access the noS menu by pressing „enter” and select the desired
program with „next” or „prev” keys, and finally press „enter” to confirm your selection.
Program number
Action
First program - Pr1
all the outputs and diodes are switched on, and blink,
simultaneously
Second program - Pr2
outputs and LEDs blink alternately in two groups, the first
group being outputs 1-4, and the other - outputs 5-8
Third program - Pr3
outputs and LEDs blink one after another: when one goes
out another turns on, in the direction from output 1 to
output 8
Fourth program - Pr4
outputs and LEDs blink one after another: when one goes
out another turns on, in the direction from output 8 to
output 1
Spd - this option allows the user to adjust program speed within the range of 0.1 - 60 seconds.

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SCENE
Sc - allows you to select a static scene, what means to activate selected outputs.
To select all outputs responsible for a static scene, press the „enter” button, then use the „next” or
„prev” button to set the chosen input marked as Ou1 - Ou8 and press „enter”. Using the buttons
„next” or„prev” set SEt to activate the selected output or CLr to turn it off.
The PX257 switch can operate in a complementary output mode.
In the Cpl menu you can select oFF - the complementary mode is switched off - the control
process is carried out normally, on1 and on2.
z In mode on1, the outputs operate in pairs, whereby one of the outputs is switched on, and
the other is switched off. The complementary pairs constitute outputs 1-2, 3-4, 5-6 and 7-8. In
this mode, control is performed by means of 4 DMX channels. This feature is utilised e.g. for
controlling electric motors.
4.5. Complementary outputs
When control is performed using the DMX signal, the device operates in the following way:
Input DMX channels
1
2
3
4
Outputs number
1 - 2
3 - 4
5 - 6
7 - 8
DMX signal value >
upper hysteresis
threshold
on
off
on
off
on
off
on
off
DMX signal value <
lower hysteresis
threshold
off
on
off
on
off
on
off
on
In case of lack of DMX control device operates as follows:
Outputs number
1 - 2
3 - 4
5 - 6
7 - 8
No signal ON
on
off
on
off
on
off
on
off
No signal OFF
off
on
off
on
off
on
off
on
enter
Where:
on - the output is enabled
off - the output is disabled

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z Mode on2: outputs are paired, each DMX channel controls one output, but the outputs are
never enabled simultaneously. If both channels are enabled (on), the output that is switched on
is the one whose DMX channel was first to be enabled.
By way of example:
The action of switching on the first DMX channel will cause the first output to be switched on.
The action of switching on the second channel (with the first channel still being on) will not switch
on output 2. This output 2 can only be switched on after the first channel (of the enabled channel
pair 1-2) is switched off (after a pre-set time).
If both DMX channels are switched off, none of the outputs are switched on.
once this feature is enabled, you
can modify delay time (adjustable in
the range of 0.1 to 5 s) between one
of the outputs in a pair being
switched off and the other output
being enabled
enter
next
next
2x next
enter
NOTE: If you want to connect an electric motor to the device, it has to be connected to paired
outputs (e.g. output 1 - phase 1 and output 2 - phase 2). If a motor is connected to unpaired
outputs, a short circuit may occur.
4.6. Hysteresis thresholds
The device can employ hysteresis which prevents relay contact vibration during switching on and
off.
Two hysteresis thresholds are applied, one for switching to the ON position, the other - to the OFF
position.
If the lower hysteresis threshold is below the upper one, a normal characteristic is obtained.
If the lower hysteresis threshold is above the upper one, a reversed control characteristic is
obtained.
If the upper and lower thresholds are identical, the channel will be switched on at all times.

enter
next
next
enter
3x next
setting a lo w e r an d upper
hysteresis threshold for all the
eight channels at the same time
(in the range of 0 - 255)
setting a lower and upper hysteresis
threshold for individual channels
output
DMX values
255
threshold
ON
threshold
OFF
0
1
OFF > ON
output
DMX values
255
threshold
ON
threshold
OFF
0
1
ON > OFF
4.7. Default settings and memory error
If you have any difficulty accessing the device menu, e.g. it is not possible to enter a particular
menu level or it is necessary to restore the device to its default settings, follow the instructions
below.
In the first case, when a particular menu level cannot be accessed or menu items are displayed
incorrectly, this may indicate that a saving-in-memory error has occurred. In such a case, try
to restore the device to its default settings before sending the PX257 to the service centre. If, after
restoring to its default settings, the device still does not operate correctly, please send it to our
service centre.
To restore the device to its default settings, press and hold the previous key while switching on
the device. One of the messages that will be displayed will say dFl, which means successful
restoring to default settings (the previous key has to be held down while powering on the device,
until the dFl message is displayed).
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POWER ON
PRESSED PREVIOUS
enter
esc
Please note that after restoring to default settings, all the operating parameters of the device will
revert to the following ones:
z DMX address: 1
z complementary outputs: off
z no signal operating mode: off
z hysteresis thresholds: ON = 141, OFF = 115
The device incorporates an embedded memory controller.
If the device experiences memory issues, the display will show an Err message - a memory error.
In such a case, press „enter” and the device will load its default configuration into the memory.
If despite those steps the device continues to display the Err message, this means that
the memory is permanently damaged and should be sent to the service centre.
You can also restore the default settings from the menu level by carrying out the following steps:
enter
enter
4x next
PREVIOUS AND NEXT
PRESSED SIMULTANEOUSLY restart of
the device
When the YES message appears on the display, press and hold down the keys „prev” and „next”
simultaneously until the device resets itself and the start menu is displayed.
If this message is accepted by pressing „enter”,
the default settings will be restored. The user can
also exit this menu level without restoring
the default settings. In order to do this, press
the „esc” key.
5. DMX SIGNAL CONNECTION
PX257 have to be connected to DMX line in serial mode, with no branches on DMX control cable.
That means that DMX line, from the signal source, must be connected to DMX IN pins of PX257
and later, directly from DMX OUT pins to the next device in DMX chain.
If the PX257 is the last DMX chain receiver there should be terminator (resistor 120 Ohm)
mounted between "DMX+" and "DMX-" pins of DMX OUT section.
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CORRECT
120 Ohm
WRONG
DMX-512 input DMX-512 output DMX line DMX-512 input
TERMINATOR CONNECTION