Honeywell Micronik 200 Specification Data page 6

R7426A TEMPERATURE CONTROLLER
2-Stage ON/OFF Sequence Control
The R7426A controller converts the output signal into a two-
stage ON/OFF sequence output signal suitable for operating
relays. Two relays can be connected to provide sequence
control of e.g. two electric heater stages.
Parameter setting for Output Switching Position:
Y1Mode = 1
Step1 on
on
off
25 30
3-Stage Binary ON/OFF Sequence Control
The R7426A controller converts the heating signal into a
3-stage binary ON/OFF sequence as shown in the following
diagram.
Parameter setting for Output Switching Position:
Y1Mode = 2
Step1 on
on
off
20 25 45
Electric Heat Current Valve (pwm output)
The pulse-width modulated output is suitable for driving
electric heat current valves and is controlled from the heating
signal. The interval or total cycle time is set by the control
parameter RuntimeY1.
The diagram below shows as example, 60% Output Signal
with Motor RuntimeY1 set to 50 sec:
Y1Mode = 3.
on
off
30
ON/OFF Output
The ON/OFF output is provided to switch fans, pumps, or
other MicroniK 200 controller without RTC.
If one of the following conditions occur, the controller
switches the ON/OFF output from OFF to ON after a fixed 3-
minute time delay:
 The controller mode ¹OFF (Comfort Standby or Night
mode).
 The night cycle program is active.
EN0B-0299GE51 R0104
Step2 on
Power
out2
out1
100 %
65 70
Step3 on
Power
Step2 on
out2
out1
50 70 75 100 %
out1/out2
50 70 80 100 sec
If one of the following conditions occur, the controller
switches the ON/OFF output from ON to OFF:
 The controller mode = OFF.
 The freeze protection input is active.
 The following function will be active in flow water
temperature applications if the configuration parameter
Ctrltyp = Hi2:
The controller switches the ON/OFF output from ON to
OFF if the outside air temperature is above 8C and the
output signal Y1 = 0% for more than 5 minutes during
Comfort, Standby, or Night mode.
ADJUSTMENTS
Y1
Control Point / Setpoint Adjustment
(CPATYP)
The control or setpoint can be adjusted via the internal or an
external potentiometer connected to the CPA/SPA input. The
CPA/SPA type is selected by the control parameter CPATYP
(see page 2, Technical Data).
Calibration of Temperature Sensors
(T1CAL, T2CAL, and T3CAL)
In case of an offset as a result of long wiring lengths the
temperature sensor inputs (T1, T2, and T3) can be adjusted
separately by the control parameters T1CAL, T2CAL, and
T3CAL.
Y1
WIRING
Wiring run
From controller to all
input and output
devices
Offset for temperature sensors due to wire resistance per
10 m distance from sensor to controller:
Y1
Type of wire
2
0.5mm
(AWG20)
2
1.0mm
(AWG17)
2
1.5mm
(AWG15)
6
Length max.
Type of
1.0mm
wires
local
100 m
standard
Temperature offset
Pt 1000 BALCO 500
0.18C 0.3C
(0.324F) (0.54F)
0.09C 0.15C
(0.162F) (0.27F)
0.06C 0.1C
(0.108F) (0.18F)
2 2
1.5mm
150 m
NTC
negligible