WURM TRH-XP is a bus-enabled dew-point controller with integrated temperature sensor and humidity sensor for use with all standard refrigeration units. It has 8 different control characteristics per channel and adjustable minimum operating time per channel. Other features include the ability to connect multiple heaters per channel, avoid current peaks when switching on, and good temperature stability with 72 switchings per hour.
WURM TRH-XP is a bus-enabled dew-point controller with integrated temperature sensor and humidity sensor for use with all standard refrigeration units. It has 8 different control characteristics per channel and adjustable minimum operating time per channel. Other features include the ability to connect multiple heaters per channel, avoid current peaks when switching on, and good temperature stability with 72 switchings per hour.
Bus-enabled dew-point controller with integrated temperature sensor and humidity sensor
TRH-XP_V2.0.1_PI_2022-03_EN 1
Subject to technical changes
TRH-XP
1 TRH-XP
Bus-enabled dew-point controller with integrated temperature sensor and humidity sensor
1.1 Front view
Fig. 1: Front view
1.2 Features
• Dew-point driven power controller for operating glass and handrail heaters
• Room temperature signals and humidity sensor signals over the Wurm CAN communication bus
(C-BUS)
• Heater control by C-BUS switch module BSM001 and ECA970
• Enthalpy shift module for rack controller DCC-XP starting from version 5, DCC-BL and DSC-XP
• Connection of several heaters per channel
• Even distribution of current loads
• Avoids current peaks when switching on
• For all standard refrigeration units
• 8 different control characteristics per channel
• Adjustable minimum operating time per channel
• Good temperature stability with 72 switchings per hour
• C-BUS address and C-BUS terminating resistor adjustable by coding switch
• Support for higher baud rates on the C-BUS
• Saves extensive consumption values for statistical analysis
• Graphical representation of power consumption in FRIGODATA XP
• Connection to the Wurm system via C-BUS and FRIGODATA XP
Bus-enabled dew-point controller with integrated temperature sensor and humidity sensor
2TRH-XP_V2.0.1_PI_2022-03_EN
Subject to technical changes
TRH-XP
1.3 Safety instructions
Writing conventions
WARNING
• Avoid the described hazard: otherwise, electric voltage represents a danger that could lead to
fatal or serious bodily injury.
CAUTION
• Avoid the described hazard: otherwise minor or medium bodily injury or damage to property will
result.
For your safety
For safe operation and to avoid personal injury and equipment damage through operator error, read
these instructions, become familiar with the device, and follow all safety instructions on the product
and in this document, as well as the safety guidelines of Wurm GmbH & Co. KG Elektronische Sys-
teme. Keep these instructions ready to hand for quick reference, and pass them on with the device if
the product is sold.
Wurm GmbH & Co. KG Elektronische Systeme accepts no liability in the case of improper use or use
for purposes other than the intended purpose.
WARNING
DANGER TO LIFE FROM ELECTRIC SHOCK AND/OR FIRE!
• Switch off the power to the entire plant when carrying out installation, wiring or disassembly work!
Otherwise, mains voltage and/or external voltage may still be present, even if the control voltage
is switched off!
• The wiring of the device must be carried out only by qualified electricians!
• Use the correct tools for any work!
• Check the entire wiring after connection!
• Never expose the device to moisture, for example due to condensation or cleaning agents.
• Stop operating the device if it is faulty or damaged and its safe operation is compromised!
• Do not open the device.
• Do not repair the device yourself! If the device requires repairs, send it in with an exact descrip-
tion of the fault!
CAUTION
FUNCTIONAL LIMITATION!
• Never mount the TRH-XP at the following places: above heating elements, near windows and
doors, on surfaces subject to strong vibrations or direct sunlight, on outside walls, on chimneys,
in walls and recesses!
• Attach the housing so that no air can flow into the housing with below-surface cables!
• Do not use silicon feeding mass to seal the cable feed!
• Protect the TRH-XP from dripping and splashing water!
CAUTION
ELECTROMAGNETIC INTERFERENCE MAY CAUSE FAULTS!
• Always use shielded data cables, and place them far away from power lines!
Target group This manual is intended for "service technician" personnel.
Intended use TRH-XP is a bus-enabled dew-point controller with integrated temper-
ature sensor and humidity sensor.
Bus-enabled dew-point controller with integrated temperature sensor and humidity sensor
TRH-XP_V2.0.1_PI_2022-03_EN 3
Subject to technical changes
TRH-XP
Version and validity of the documentation
Any versions not listed are special solutions for individual projects and are not described in detail in this document.
This document will automatically cease to be valid if a new technical description is issued.
Manufacturer: Wurm GmbH & Co. KG Elektronische Systeme, Morsbachtalstraße 30, D-42857 Remscheid
You can find more information on our website at www.wurm.de.
1.4 Connection diagram
Fig. 2: Connection diagram
Wurm Infocenter paperless info
Version Date
V2.0.1
and higher
2022-03 Documentation status
Pos. Designation
1DIP switch "120Ω" for CAN bus termi-
nating resistor
2Coding switch "ADDRESS" for CAN
bus address
3DIP switch "BAUD" for CAN bus baud
rate
5678910 11 12
5 0V
6 L
7 H
8 0V
9 L
10 H
11 U+
12 GND
Bus-enabled dew-point controller with integrated temperature sensor and humidity sensor
4TRH-XP_V2.0.1_PI_2022-03_EN
Subject to technical changes
TRH-XP
1.5 Installing the device
WARNING
DANGER TO LIFE FROM ELECTRIC SHOCK AND/OR FIRE!
• Switch off the power to the entire plant when carrying out installation, wiring or disassembly work!
Otherwise, mains voltage and/or external voltage may still be present, even if the control voltage
is switched off!
CAUTION
FUNCTIONAL LIMITATION!
• Never mount the TRH-XP at the following places: above heating elements, near windows and
doors, on surfaces subject to strong vibrations or direct sunlight, on outside walls, on chimneys,
in walls and recesses!
• Attach the housing so that no air can flow into the housing with below-surface cables!
• Do not use silicon feeding mass to seal the cable feed!
• Protect the TRH-XP from dripping and splashing water!
The TRH-XP must be installed so that the ambient air can flow freely through the air slit in the housing
cover from bottom to top.
When wiring the data lines, please refer to the “FRIGOENTRY bus system” description.
For sensor extensions, it is recommended that sheathed cable be laid.
1.6 Technical data
Cable length Cross-section
up to 100m 0.75mm2
up to 400m 1.5mm2
Power supply 15…24V=
Power consumption 300mW approx.
Central unit Single-chip microcomputer, data memory
Sensors Internal temperature sensor and humidity sensor, measurement
range:
-20…+50°C +/-0,3%
0…100%rH +/- 2%
Monitoring system Monitoring of the connected sensors,
Self-monitoring of data memory and microcomputer
Communication 3-wire CAN bus interface with integrated power supply, galvanically
isolated
Internal clock time Detection of system clock time on the gateway (only when used in
the CAN bus system), with no power reserve in the event of power
failure
Dimensions (W x H x D) 85 x 85 x 20mm (DIN 43880)
Fastening Wall installation, 2 screws
Ambient temperature Operation: -20…+55°C, storage: -10…+50°C at 20…60%rH
Weight About 100g
CE conformity - 2014/30/EU (EMC Directive)
EAC conformity - TR CU 020/2011
RoHS II
Valid from Version 2.0.1
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WURM TRH-XP is a bus-enabled dew-point controller with integrated temperature sensor and humidity sensor for use with all standard refrigeration units. It has 8 different control characteristics per channel and adjustable minimum operating time per channel. Other features include the ability to connect multiple heaters per channel, avoid current peaks when switching on, and good temperature stability with 72 switchings per hour.
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