PRINTED IN C
ANAD
A
IN-GE-GTARESXXX-01-02 02/19
Page 4
Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: +1 506 853 3057 Web: www.greystoneenergy.com
This is useful in several ways, for example, discreet resistor may be connected to the W (min) and R
(wiper) terminals of the FAILSAFE connector to set a minimum resistance value on power failure. If the
signal interface is controlling a damper actuator, then the resistance would set a minimum open position
on power failure.
To failsafe to the minimum signal interface resistance value, connect a wire jumper between the W and R
terminals of the FAILSAFE connector.
To failsafe the maximum signal interface resistance value, connect a wire jumper between the B and R
terminals of the FAILSAFE connector.
A manual potentiometer may also be connected to the FAILSAFE connector to allow manual control.
The PCB has a MAN / AUTO jumper that can be used to force the failsafe mode. For normal operation the
jumper is placed in the AUTO position. To test the system, place the jumper in the MAN position and the
OUTPUT terminals will immediately connect to the FAILSAFE terminals so an external pot can be used to
manually control the device connected to the signal interface output.
Return the jumper to the AUTO position for normal operation.
SPECIFICATIONS
POWER OUTPUT
Regulated Power Output ............ 20 Vdc ± 10% (use to power an external sensor)
Power Output Drive ...................... 30 mA maximum
INPUT SIGNAL
Voltage Range ................................ 0-5, 0-10, 0-15, 1-5, 2-10, or 3-15 Vdc (switch selectable)
Voltage Impedance ...................... >10 KΩ
Current Range................................. 0-20 or 4-20 mA (switch selectable)
Current Impedance ....................... 250 Ω
OUTPUT SIGNAL
Signal Type ....................................... Simulated potentiometer resistance (3 wire)
Resolution ........................................ 256 steps (no wrap around)
Resistance Accuracy ..................... ±5%
Standard Values ............................. 0-135 Ω, 4.5 watts
0-270 Ω, 3.0 watts
0-500 Ω, 3.0 watts
0-1000 Ω, 1.0 watts
other ranges available
GENERAL
Power Supply .................................. 23 to 30 Vdc, 22 to 27 Vac (half-wave rectified)
Consumption .................................. 110 mA maximum
Input Voltage Effect ...................... Negligible over specified operating range
Protection Circuitry ....................... Reverse voltage protected, overvoltage protected
Operating Conditions .................. 0 to 50°C (32 to 122°F), 5 to 95 %RH non-condensing
Storage Conditions ....................... -30 to 70°C (-22 to 158°F), 5 to 95 %RH non-condensing
Wiring Connections ...................... Screw terminal block (12 to 22 AWG)
Enclosure .......................................... Snap track mounting standard
117mm L x 83mm W (4.6" x 3.25")
Weight ............................................... 131gm (4.6oz)
Country of Origin ..............................Canada
DIMENSIONS
POWER
OFF ON
S1
S2
S3
S4
INPUT SELECTION
MAN AUTO
PWR COM 20V IN
W=MIN B=MAX W R B
W R B
FAILSAFE
OUTPUT
117mm
4.6"
83mm
3.25"
