Filter
Top Products
INPUT SIGNAL
The control can accept either a 0 - 10 V (dc) signal or a 2 -
10 V (dc) signal. The External Input Signal setting must be
set to the proper setting based on the signal that is being
sent to the control.
0 - 10 V (dc) or 0 - 20 mA
When the 0 - 10 V (dc) signal is selected, an input voltage
of 1 V (dc) corresponds to a boiler target temperature of
50°F (10°C). An input voltage of 10 V (dc) corresponds to a
boiler target temperature of 210°F (99°C). As the voltage
varies between 1 V (dc) and 10 V (dc) the boiler target tem-
perature varies linearly between 50°F (10°C) and 210°F
(99°C). If a voltage below 0.5 V (dc) is received the boiler
target temperature is displayed as " - - - " indicating that
there is no longer a call for heating.
A 0 - 20 mA signal can be converted to a 0 - 10 V (dc) sig-
nal by installing a 500 ohm resistor between the Out + and
Com - terminals (4 and 1).
2 - 10 V (dc) or 4 - 20 mA
When the 2 - 10 V (dc) signal is selected, an input voltage
of 2 V (dc) corresponds to a boiler target temperature of
50°F (10°C). An input voltage of 10 V (dc) corresponds to a
boiler target temperature of 210°F (99°C). As the voltage
varies between 2 V (dc) and 10 V (dc) the boiler target tem-
perature varies linearly between 50°F (10°C) and 210°F
(99°C). If a voltage below 1.5 V (dc) is received the boiler
target temperature is displayed as " - - - " indicating that
there is no longer a call for heating.
A 4 - 20 mA signal can be converted to a 2 - 10 V (dc) sig-
nal by installing a 500 ohm resistor between the Out + and
Com - terminals (4 and 1).
OFFSET
The Offset setting allows the boiler target temperature to be
fine tuned to the external input signal. The control reads the
external input signal and converts this to a boiler target tem-
perature. The Offset setting is then added to the boiler tar-
get temperature.
EXTERNAL INPUT SIGNAL CONVERSION TABLES
16