1150.11E
January 2007
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Copyright
2005 Produal Oy. All rights reserved
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HLS34 Modbus FCU/VAV Controllers installation instructions
Model Type
Model
Description
HLS34
HLS34 Room Temperature Controller with Modbus Networking Capability
Technical Data
Power Supply
24Vac/dc (20…26V), <1VA
NOTE! If using DC-voltage only 0..10V outputs are operational
Inputs
Built-in Temperature Sensor
1 x NTC10 e.g. TEHY -NTC10 (for control or measurement only)
1 x Volt-Free (PIR – normally closed)
1 x Analogue (CO2 measurement)
Outputs
2 x 0..10Vdc (Heating/Cooling Actuators, VAV or Fan Speed Control)
4 x 24Vac Triacs, 1A maximum (3-Point Actuators / Thermic Actuators)
Communications
RS-485 Modbus RTU, 9600/19200/38400 bps, 8 data bits, Parity None, 1 Stop Bit (Up to
128 devices per segment)
Set Point Adjustment
DAY SETPOINT
21°C
±
3°C (factory default); setpoint adjustable pressing “+” and “-“ buttons within
programmable
±
range; network setpoint available via Modbus or in the configuration mode
NIGHT SETPOINT
5-20°C (factory default 18°C); adjustment available via Modbus or in configuration mode
Accuracy
±
0.5°C
Dead Zone
DAY mode Dz = 0..3°C (factory default = 0.3°C)
Relaxed mode Dz = 0..10°C
Proportional Band
Xp = 1..8°C (factory default = 4°C)
Integral Action Time
Tn = 50..500s (factory default = 300 sec)
3-Point Control
Actuator Runtime
Mt = 30..300s (factory default = 180 sec)
Protection Class
IP20
Operating Humidity
0..95% rH non-condensing
Wiring Terminals
1.5 mm
2
Housing
ABS Plastics
Dimensions
87W x 86H x 32D mm
The HLS34 is specifically designed for individual room temperature
and zone control applications. The controllers have built-in RS-485
channel for Modbus communication. The controllers can be
connected to any supervisory software/system that supports
Modbus RTU.
The HLS34 has built-in display and unique touch sensitive buttons
for adjusting the user parameters and to configure the controller.
The controller supports 0..10V actuators, 3-point controlled
actuators and thermic actuators. One of the controller 0..10Vdc
outputs can be configured for fan speed control via FCRY3 relay
module.
Temperature is detected by the internal sensor of the HLS34. If an
external temperature sensor such as return air sensor or remote
room sensor is required, this can be connected to the wiring
terminals provided on the controller. The external sensor type is
NTC10.
The controller has DAY and NIGHT operating modes. When in the
NIGHT mode the controller can be overridden to the DAY mode via
a hardware input, by touching day extension button or over the
MODBUS network. The controller has also a CO2 measurement
input for boosting the ventilation (fan speed) in case of high CO2
level in the room space.
