GUDE Expert Power Sequencer 8112 Series

Device Description

Security Advice

• The device must be installed only by qualified personnel according to installation and operating instructions.
• The manufacturer is not responsible for improper use or use with equipment causing personal injury or material damage.
• The device contains no user-serviceable parts; maintenance must be performed by factory-trained personnel.
• Contains potentially hazardous voltages; do not open or disassemble.
• Connect only to 230V AC (50 Hz or 60 Hz) power supply sockets.
• Ensure power cords, plugs, and sockets are in good condition and connected to properly grounded outlets.
• Intended for indoor use only; do not install in areas with excessive moisture or heat.
• Modifications without permission are not allowed due to safety and approval issues.
• Always consult the safety advice and manuals of connected devices.
• The device is not a toy and should be kept out of reach of children.
• Handle packaging material responsibly and recycle plastics.
• Contact the GUDE support team for any unclear questions regarding installation, operation, or usage.
• Never leave connected equipment unattended.
• Connect only electrical devices that have a continuous on-time capability without causing damage in case of failure.

Content of Delivery

• Expert Power Sequencer 8112
• Quick Start Guide

Description

The Expert Power Sequencer 8112 is a PDU (Power Distribution Unit) that switches load outputs with a delay to avoid voltage peaks. It features:

• 6 power ports switchable in a controlled sequence via front panel switches or external pushbuttons.
• Sequential switching of connected loads on and off with a 3-second delay between adjacent outputs.
• Individually settable time intervals for each load output.
• Prevention of current peaks during simultaneous switching operations and tripping of upstream fuses.
• A jack connector for connecting I/O contacts and switches, enabling remote control of the switching routine.
• Low power consumption.
• Developed and produced in Germany.

Additionally for EPS 8112-2, EPS 8112-4, and EPS 8112-6:

• Integrated overvoltage protection type 3 (according to EN61643-1) to protect the device and connected loads.
• Integrated mains filter to prevent interference currents, ensuring signal quality for connected devices like loudspeakers, amplifiers, and beamers.

Installation

Connectors

The front panel of the Expert Power Sequencer 8112 features:

• 1. Switch: For controlling the on/off sequence.
• 2. Status LED: Indicates the operational status.
• 3. Jack socket: For connecting an external switch.
• 4. LED for overvoltage protection: (EPS 8112-2 / 8112-4 / 8112-6) Red indicates protection is inactive.

The device provides load outputs to consumers:

• EPS 8112-1 / 8112-2 / 8112-6: 6 x IEC C13 load outputs, max. 10 A each.
• EPS 8112-3 / 8112-4: 6 x CEE 7/3 type F load outputs, max. 16 A each.

Jack Plug Accessory

The Expert Power Sequencer 8112 can be remotely controlled using an external switch via cable. The Jack Plug Adapter 7960 (3.5 mm, 3-pole) is available as an accessory. The jack plug connects to the front panel. Points (2) and (4) are for connecting an external potential-free switch. An optional LED (3) in the switch can be controlled, internally connected to 5V with a 560R resistor.

Block Diagram

The block diagram illustrates the structure of the EPS 8112-4. It shows the power input, sequencer, and power supply unit feeding into the load outputs. Note that other models may differ in overvoltage protection, line filters, or load output types.

Technical Specifications

SPD according to EN 61643-1 type 3 / class III (EPS 8112-2 / 8112-4 / 8112-6)

EMC/EMI Mains Filter (EPS 8112-2 / 8112-4 / 8112-6)

The EMC/EMI Mains Filter circuit consists of Line (L), Neutral (N), and Protective Earth (PE) connections. It includes a resistor (R), capacitors (Cx, Cy), and an inductor (L) for filtering. Specific components are: L - Würth 1.5mH 18A, R - Yageo 1M Ohm, Cy - 2* TDK 3.3nF Y2, Cx - 2* TDK 0.47μF X2.

Operating

Operating the device

The device starts with the front switch (1) in the "off" position and all load outputs switched off. The status LED (2) is red. When the switch is set to "on", the 6 load outputs switch on sequentially with approximately 3-second intervals (configurable). The status LED flashes green, indicating the sequence (one flash for the first output, two for the second, etc.), and turns solid green when all outputs are active. To switch off with a delay, set the switch to "off". The outputs switch off sequentially in reverse order, with the status LED flashing red six times as the last output turns off. The LED then turns permanently red. The switch-off sequence is also configurable. Switch-on or switch-off sequences cannot be interrupted; the switch position is only considered at the end of a sequence.

Operation with optional external switch

Connecting a jack plug with a switch to the jack socket (3) deactivates the front switch. Control is then managed solely by the external switch. Closing the external switch initiates the switch-on sequence when all outputs are off. Opening it starts the switch-off sequence when all outputs are on. An LED connected to the external switch will light up permanently at the end of the power-up sequence and flash slowly when all outputs are switched off.

Overvoltage Protection

Models EPS 8112-2, EPS 8112-4, and EPS 8112-6 feature overvoltage protection (SPD type 3, EN61643-1). This protection uses input-side varistors, a thermal fuse between phase (L) and neutral (N), and a gas discharge tube to ground (PE) to safeguard internal electronics and load outputs. Failure detection is indicated by the status LED (4) on the front panel: green means protection is active, flashing red indicates a fault. While designed for numerous surge pulses, frequent high-energy pulses can lead to aging and potential failure of the protection element. This function can only be restored by the manufacturer. The device may continue to operate even after the protective function fails.

Configuration

The EPS 8112 is factory-configured for sequential switching of ports every 3 seconds, both for turn-on and turn-off (in reverse order). These defaults are generally suitable, but adjustments can be made for specific applications, such as ensuring an amplifier switches on last and off first in a media control setup.

Initiate programming mode

To enter programming mode:

• Switch the device on and off twice, with each operation lasting less than 2 seconds. The status LED will then flash alternately red and green.
• Ensure all ports are switched off before starting programming mode.
• Programming mode exits automatically when an external connector is plugged in.
• The overvoltage protection LED is inactive during programming mode.

Resetting all values (3 sec switch-on delay and descending switch-off sequence)

1. Start programming mode.
2. Switch to "On" within 3 seconds.
3. After 5 seconds, the red-green LED flashes faster.
4. Wait another 5 seconds; the LED will flash red 3 times.
5. Turn the device off. The EPS 8112 is now in the switched-off state, outside programming mode.

Reversing the direction of the switch-off process

1. Start programming mode.
2. Switch to "On" within 3 seconds.
3. After 5 seconds, the red-green LED flashes faster.
4. Switch off within 5 seconds; the LED will flash green 3 times.
5. The EPS 8112 is now in the switched-off state, outside programming mode.

Set all ports to the same waiting time

1. Start programming mode.
2. Wait 3 seconds; the LED flashes orange 3 times.
3. If you remain in the "off" state for 5 seconds, programming mode will be exited.
4. To set the time, switch to "On"; the LED will flash red every second.
5. After setting the desired time, switch to "Off" (for N seconds, indicated by N flashes).
6. The EPS 8112 will be in the switched-off state, outside programming mode.

The minimum waiting time for switching on is 2 seconds, and the maximum is 60 seconds. The waiting time for switching off is fixed at 3 seconds.

Example: All ports set to 10 seconds

• Perform 2x switch on and off (enters programming mode).
• Wait 3 seconds; the LED flashes orange 3 times.
• Switch on, wait 10 seconds, then switch off.

Set one or more ports to a waiting time

1. Start programming mode.
2. To select the Xth port, switch on and off X times. If you switch multiple times and remain in the "On" position for more than 5 seconds, programming mode will be exited.
3. Wait 3 seconds; the LED flashes green X times.
4. If no action is taken for 5 seconds, programming mode is exited.
5. To set the time, switch to "On"; the LED flashes red every second.
6. Switch off after the desired time (N seconds, indicated by N flashes).
7. The next port (X+1) is now selected; continue from step (b) for switching on, and step (c) for waiting 3 seconds.

The minimum waiting time for switching on is 2 seconds, and the maximum is 60 seconds. The waiting time for switching off is always fixed at 3 seconds.

Example: Set port 2 to 7 sec, port 3 to 8 sec, and port 5 to 10 sec

• Perform 2x on and off (enters programming mode).
• Switch 2x on-off to select port 2.
• Wait 3 sec; the LED flashes green 2 times.
• Switch on, wait 7 sec, then switch off.
• Wait 3 sec; the LED flashes green 3 times.
• Switch on, wait 8 sec, then switch off.
• Switch 5x on-off to select port 5.
• Wait 3 sec; the LED flashes green 5 times.
• Switch on, wait 10 sec, then switch off.
• Wait 5 sec; the EPS 8112 exits programming mode.

Support

For further questions regarding installation or operation, please contact the GUDE support team. FAQs and configuration examples are available on the support wiki at www.gude.info/wiki.

Contact

GUDE Systems GmbH
Von-der-Wettern-Straße 23
51149 Cologne
Germany

Phone: +49-221-985 925 0
Fax: +49-221-985 925 97
E-Mail: info@gude-systems.com
Internet: www.gude-systems.com

Managing Director: Dr.-Ing. Michael Gude, Andreas Boettcher, Philipp Gude

District Court: Köln, HRB-Nr. 17 7 84
WEEE-number: DE 58173350
VAT ID: DE 122778228

Declaration of Conformity

This product from the Expert Power Sequencer 8112 series conforms to applicable European directives for CE marking. The complete CE declaration of conformity is available on the website www.gude-systems.com in the product's download section.