iSMACONTROLLI DMP254en Touch Point Hardware User Manual

: June 13, 2024
: iSMACONTROLLI

Table of Contents

Introduction
Safety Rules
Technical Specification
Hardware Specification
Mounting and Installation
References
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iSMACONTROLLI DMP254en Touch Point Hardware User Manual

Introduction

The Touch Point is a modern comfort management wall panel with two most popular open communication protocols: Modbus RTU/ASCII and BACnet MS/TP. The Touch Point is available in different configurations of sensors (temperature, CO2, and humidity), colors, and versions with or without a display. The panel is equipped with a TFT display and touch buttons.

The panel can be configured using the iSMA Configurator software or Modbus registers/ BACnet objects. It fits most of standard junction boxes in Europe and can easily be installed using a wall back box.

Revision History

Table 1. Revision history

Rev.	Date	Description
1.0	20 Apr 2022	First edition
1.1	25 May 2022	Editorial corrections

Safety Rules

Improper wiring of the product can damage it and lead to other hazards. Make sure that the product has been correctly wired before turning the power on.
Before wiring or removing/mounting the product, make sure to turn the power off.
Failure to do so might cause an electric shock.
Do not touch electrically charged parts such as power terminals. Doing so might cause an electric shock.
Do not disassemble the product. Doing so might cause an electric shock or faulty operation.
Use the product only within the operating ranges recommended in the specification (temperature, humidity, voltage, shock, mounting direction, atmosphere, etc.). Failure to do so might cause a fire or faulty operation.
Firmly tighten the wires to the terminal. Failure to do so might cause a fire.
Avoid installing the product in close proximity to high-power electrical devices and cables, inductive loads, and switching devices. Proximity of such objects may cause an uncontrolled interference, resulting in an instable operation of the product.
Proper arrangement of the power and signal cabling affects the operation of the entire control system. Avoid laying the power and signal wiring in parallel cable trays. It can cause interferences in monitored and control signals.
It is recommended to power controllers/modules with AC/DC power suppliers. They provide better and more stable insulation for devices compared to AC/AC transformer systems, which transmit disturbances and transient phenomena like surges and bursts to devices. They also isolate products from inductive phenomena from other transformers and loads.
Power supply systems for the product should be protected by external devices limiting overvoltage and effects of lightning discharges.
Avoid powering the product and its controlled/monitored devices, especially high power and inductive loads, from a single power source. Powering devices from a single power source causes a risk of introducing disturbances from the loads to the control devices.
If an AC/AC transformer is used to supply control devices, it is strongly recommended to use a maximum 100 VA Class 2 transformer to avoid unwanted inductive effects, which are dangerous for devices.
Long monitoring and control lines may cause loops in connection with the shared power supply, causing disturbances in the operation of devices, including external communication. It is recommended to use galvanic separators.
To protect signal and communication lines against external electromagnetic interferences, use properly grounded shielded cables and ferrite beads.
Switching the digital output relays of large (exceeding specification) inductive loads can cause interference pulses to the electronics installed inside the product. Therefore, it is recommended to use external relays/contactors, etc. to switch such loads. The use of controllers with triac outputs also limits similar overvoltage phenomena.

Technical Specification

Table 2. Technical specification

Power Supply	DC	20-34 V
AC	24 V ± 20%
Built-in Sensors	Temperature sensor	10k NTC type, accuracy: ± 0.5˚C,

Hardware Specification

This section outlines all details regarding hardware specification of the Touch Point panel.

Panel Versions

The Touch Point panel is available in the following versions:

Table 3. Panel versions

Product Code	Temperature Sensor	CO2Sensor	Humidity Sensor	Display	Color
Black	White
TP-DISP-B
TP-H-DISP-B
TP-C-DISP-B
TP-HC-DISP-B
TP-DISP-W
TP-H-DISP-W
TP-C-DISP-W
TP-HC-DISP-W
TP-B
TP-H-B
TP-C-B
TP-HC-B
TP-W
TP-H-W
TP-C-W
TP-HC-W

ISP: display (product code without a DISP part means a panel without a display);
C: CO2 sensor (optional);
H: humidity sensor (optional)

Dimensions

Dimensions

Touch Panel

Touch Panel

5 buttons for occupancy, temperature (–/+), and fan (small fan/big fan icons) control;
3 blue and 3 red LEDs for temperature signalization;
3 white LEDs for fan signalization.

The LCD display shows following information:

temperature setpoint or offset (after pushing a + or – button, according to configuration);
temperature current value with unit;
humidity current value with unit (optionally);
CO2 current value with unit (optionally).

Note: Currently displayed parameters change with a frequency set in the 40217 register.
Display sequence

LEDs

LEDs

The panel is equipped with:

1 white LED for signalizing occupancy status;
3 blue and 3 red LEDs for temperature signalization (cooling or heating);
3 white LEDs for fan modes indication;
1 ECO LED;
1 navigation LED to localize the panel in the dark.

LED Modes

The Touch Point panel works in 3 modes of LED lighting intensity:

active: the LED lighting mode after any button on the screen has been touched;
idle: the LED lighting mode after a time set from a last button has been touched;
standby: the LED lighting mode after a time set from going into the idle mode.

All lighting intensity values in these three different modes can be set in the 40207-40216 Modbus registers.

Buzzer

The Touch Point panel is equipped with a buzzer, which informs about a detected touch with a short sound.

The buzzer also provides a CO2 alarm function, which emits sounds once the CO2 level exceeds a set alarm value. The alarm can be confirmed and muted by pressing any button.

The buzzer may be activated or deactivated using the DEVICE_CONFIGURATION register/ object (bit 0, BUZZER)

Table 4. The BUZZER values

Register Value	Description
0	Buzzer deactivated
1	Buzzer activated

By default, the buzzer is active.

Power Supply

DC Power Supply Connection

AC Power Supply Connection

RJ45 Power Supply Connection

Communication

The Touch Point panel supports Modbus RTU/ASCII and BACnet MS/TP communication protocols, using 2 RJ45 sockets and a screw terminal. The panel has one USB type C (USB 2.0) port for communication with the iSMA Configurator and FCU Updater software.

Note: A communication protocol is selected by setting a second switch on the DIP switch on the back of the panel:

Off: Modbus RTU/ASCII (default);
On: BACnet MS/TP.

**RS485 Connection

Connection **

RS485 Network Termination

Transmission line effects often present a problem for data communication networks.
These problems include reflections and signal attenuation. To eliminate the presence of reflections of signal from the end of the cable, the cable must be terminated at both ends with a resistor across the line adequate to its characteristic impedance. Both ends must be terminated since the propagation is bidirectional. In case of an RS485 twisted pair cable this termination is typically 120 Ω.

Note: A termination resistor can be added with a third switch on the DIP switch on the back of the panel:

Off: termination resistor disconnected (default);
On: termination resistor added.

USB Connection

The USB port is used to communicate with product software, such as the iSMA Configurator or FCU Updater, for configuration and firmware updates. The USB port provides 5 V DC power supply.

DIP Switch

The Touch Point panel is equipped with a 3-position DIP switch. Each of three sections has a separate function:

the first switch allows for restoring default settings;
the second switch allows for selecting a communication protocol;
and the third switch allows for the RS485 network termination

Restoring Default Settings

The first switch provides a possibility to restore default settings in the panel. In order to do so, follow the steps below:

Turn off the power supply;
Set the first switch to on;
Turn on the power supply;
Wait until the display blinks;
Set the third switch to off.

Default Settings

Table 5. Default values

Variable	Default Value
Baud rate	115200
Stop bits	1
Data bits	8
Parity bits	None
Protocol	Modbus RTU
Modbus address	1
Replay delay	None

Selecting Communication Protocol

The second switch selects between the available communication protocols, Modbus RTU/ ASCII or BACnet MS/TP:
Selecting Communication Protocol

Off: Modbus RTU/ASCII (default);
On: BACnet MS/TP.

RS485 Network Termination

The third switch adds or disconnects a termination resistor to the RS485 network:
Network Termination

Off: termination resistor disconnected (default);
On: termination resistor added (120 Ω).

Rotary Switch

Setting Device Address

The Touch Point panel is equipped with a rotary switch, which allows for setting a Modbus address in a range from 0 to 9. If the switch is set to 0, the address is read from the ADDRESS register/object (decimal address: 22).

Mounting and Installation

Step 1: Fit the back box to the junction box.
Step 2: Fit the panel to the back box, starting from up corners. Make sure the USB port is headed downwards.
Mounting and Installation
Step 3: Gently push in the bottom corners of the panel to the back box.

Step 4: Screw the panel to the back box. Turn the screw clockwise.