Programmable Temperature Controller MТC4

SHORT DESCRIPTION

MTC4 is a programmable temperature controller for heating, cooling and ventilation systems.
It can read up to 4 temperature sensors of PTC type (pt100, pt1000, KTY81-110) or others on request
There are 4 independent relay outputs for control of various devices
The logics of operation can be either selected from previously defined schemes or can be easily programmed by user.

Each output can be individually configured to operate following own specific conditions (program) described on simple  AND / OR language.
Additional has the following functionality

-         time based hysteresis for delaying the switching for each output
-         Cyclic timer with selectable period and duty cycle – (self oscilating)
-         Real time clock with fixed and programmable time zones 


TECHNICAL SPECIFICATION

Power supply – 230 V±10%
4 x separte sensors KTY81-110 ( Pt1000 or KTY81-110 or pt100).
4 x relay outputs.
Real time clock with calendar and backup power for clock.
LCD alphanumeric display in 8х2 rows form.
Navigation buttons - 4.
Option – interface RS232(TTL) / RS485 /Modbus RTU, at request.

FUNCTIONAL CHARACTERISTICS
Paramerer list:

1.       “dT1” – forms T1+dT1 value, where dTx is in range -20..+20’c
2.       “dT2” – forms T2+dT2 value, where dTx is in range -20..+20’c
3.       “dT3” – forms T3+dT3 value, where dTx is in range -20..+20’c
4.       “dT4” – forms T4+dT4 value, where dTx is in range -20..+20’c

The description of following parameters 5 to 18 is given as example

5.       “T1Good” – required temperature of object 1 / Sensor S1
6.       “T1Min”   – minimal temperature of object 1  / Sensor S1
7.       “T1Max”   - maximal temperature of object 1 / Sensor S1
8.       “T2Good” – required temperature of object 2 / Sensor S2
9.       “T2Min”   – minimal temperature of object 2  / Sensor S2
10.    “T2Max”   - maximal temperature of object 2 / Sensor S2
11.    “T3Good” – required temperature of object 3 / Sensor S3
12.    “T3Min”   – minimal temperature of object 3  / Sensor S3
13.    “T3Max”   - maximal temperature of object 3 / Sensor S3
14.    “T4Good” – required temperature of object 4 / Sensor S4
15.    “T4Min”   – minimal temperature of object 4 / Sensor S4
16.    “T4Max”   - maximal temperature of object 4 / Sensor S4
17.    “Deice1”  - deice temperature 1
18.    “Deice2”  - deice temperature 2
19.    “CHA_min_time” – time based hysteresis for output 1
20.    “CHB_min_time” – time based hysteresis for output 2
21.    “CHC_min_time” – time based hysteresis for output 3
22.    “CHD_min_time” – time based hysteresis for output 4
23.    “CTimer” – cyclic timer duration of “active” state
24.    “cTimer” – cyclic timer – cycle time

PROGRAMMING

The following table describes the operational principle for each output. In order the “output” to be active is all conditions of at least one row to be true (valid).

Condition 1 AND Condition 2 AND Condition 3 AND Condition 4
                                 OR
Condition 5 AND Condition 6 AND Condition 7 AND Condition 8
                                 OR
Condition 9 AND Condition 10 AND Condition 11 AND Condition 12
 
Where each “condition” can be of the following type:

-         Reading of temperature (1..4) [> or <]  Parameter (1..18)
-         True / False
-         Time zone – DAY time /Night time
-         Time zone (programmable)  – Active / Inactive
-         Relay output (1..4) active / inactive
-         Cyclic timer = true during active cycle; = false during inactive cycle