ds-grc0 pages

GRC |

temp/rH electronic two fans speed controller

The GRC digital fan speed controller is a temperature and relative humidity dependent
speed controller for areas with inlet and exhaust air flow. Minimum motor speed, relative
humidity/temperature and negative pressure setpoints can be adjusted by front panel potentiometers.
The GRC has an internal slide switch for choosing only temperature setting or relative
humidity and temperature setting. Minimum and maximum speed can also be adjusted
internally. There is a separate on/off switch with the possibility to bypass or to branch off
230 VAC. The controller is overvoltage protected by a varistor and has a built-in overcurrent fuse.
The GRC uses Sentera’s digital relative humidity/temperature sensor FLTS-RH-010 or the
analog temperature sensor FLTSP-500-010, sold separately.

S p e c i f i c at i o n s

230 VAC - 50 Hz - 10 A (2 x 5 A output)
Infinitely variable control
Internal minimum and maximum speed setting
Dewpoint/Temperature program (mode) selectable by slide switch
Enclosure: plastic (R-ABS, UL94-V0, RAL 7035), IP54
Ready mounted cable glands
0-10 VDC/0-20 mA selectable by slide switch
LED funtionality indication
Maximal ambient temperature: 35 °C
FLTS-RH-010 or FLTSP-500-010 sensors not included
According to the low voltage directive: 2006/95/EC / the EMC directive: 2004/108/EC

W i r i n g d i a gr a m
L

T&RH

N
Pe
L1
VCC

Temp.

0-20mA

Analog output

0-10V

CONTROL BOARD

Vmin Vmax

GND

T

SDA
SCL
T
GND
NC
COM
NO
Ao

Ao

GND
Fan1
Fan2

Pt500

GND

RELAY

Pe L1 NCCOM NO

SCL

N

SDA

L

FAN2

FLTS-RH-010

FAN1

VCC

POWER BOARD

power supply line - single phase
230 VAC - 50 Hz
power supply neutral
power earth
not regulated output 230 V
power supply for digital sensor
(3,0 - 3,3 VDC)
data line for digital sensor
clock for digital sensor
temperature sensor FLTSP-500-010 or ROTSP-500
ground
relay output
relay output
relay output
analog output (0-10 V/100 mA or
0-20 mA - select by switch)
ground
fresh air fan
exhaust fan

EVS/EVSS

25/10/2012

S.3.2.2