Microtech 2300 - Connections and Terminals; Unit Controller and Control Modules I;O Descriptions

CONNECTIONS AND TERMINALS
MICROTECH 2300 UNIT CONTROLLERDAIKIN APPLIED
4
Connections and Terminals
Unit Controller and Control Modules
I/O Descriptions
Table 1: MicroTech 2300 unit controller connector and
terminal descriptions
Connector I/O Type Signal Description
H1-1 24 VAC Power VAC Control Power Voltage
H1-2 GND Power Ground Control Power Common
H1-3 12V A2L Input VDC A2L Sense Voltage
H1-4 12 VDC Output VDC A2L Mitigation Voltage
H1-5 A2L FLT Input Digital A2L Fault Alarm
H2-1 LWT Input Analog
Leaving Water Temperature
H2-2 GND REF Common
H2-3 DAT Input Analog
Discharge Air Temperature
H2-4 GND REF Common
H2-5 ST1 Input Analog
Comp1 Suction Temperature
H2-6 GND REF Common
H2-7 COF Input Analog Condensate Overow
H3-1 12 VDC Output VDC
Base/Expansion Board
Interface
H3-2 12V A2L Output VDC
H3-3 RXD COM UART
H3-4 TXD COM UART
H3-5 GND COM UART
H4-1 B(+) COM N/A
Future UseH4-2 A(-) COM N/A
H4-3 GND COM N/A
H5-1 GND REF Common
Comp1 Reversing Valve
H5-2 RV Output 24 VAC
H6-1 N/C Output 24 VAC
Pump Request - Normally
Closed Terminal for Normally
Open Valves
H6-2 N/O Output 24 VAC
Pump Request - Normally Open
Terminal for Normally Closed
Valves
H6-3 GND REF Common Pump Request
H7-1,2 HP1 Input Digital Comp1 High Pressure
H7-3,4 LP1 Input Digital Comp1 Low Pressure
TB1-1 R Output 24 VAC Thermostat 24 VAC Power
TB1-2 W2 Input 24 VAC Thermostat Heat Stage 2
TB1-3 W1 Input 24 VAC Thermostat Heat Stage 1
TB1-4 Y2 Input 24 VAC Thermostat Cool Stage 2
TB1-5 Y1 Input 24 VAC Thermostat Cool Stage 1
TB1-6 G Input 24 VAC Thermostat Fan
TB1-7 C REF Common Thermostat Common
TB2-1 LED Output 5 VDC Room Sensor LED
TB2-2 FM Input Analog Room Sensor Fan/Mode
TB2-3 SP Input Analog Room Sensor Setpoint Adjust
TB2-4 RM Input Analog
Room Sensor Air Temp /
Tennant Override
TB2-5 GND REF Common Room Sensor
TB3-1 E Input Digital Emergency Shutdown
TB3-2 U Input Digital Unoccupied Sensor
TB4-1,2 ALM Output Digital Alarm Output - Contact Closure
BLOWER VIN Input VAC Blower Motor Voltage
BLOWER LOW Output VIN Blower Motor Low Speed
Connector I/O Type Signal Description
BLOWER MAIN Output VIN
Blower Motor High Speed or
ECM
LIVE
(Relay)
Comp1 Output L1/24V Compressor Stage 1
LIVE x 3 24V/L1 Input VAC COMP1 Line1 Control Voltage
LIVE x 3
COM/
NEU/L2
Input VAC COMP1 Line2 Control Voltage
Daughter
Board
BACnet COM SPI BACnet MS/TP Only
Table 2: MT2310 I/O board connectors and terminals
Connector I/O Type Signal Description
H1-1 GND Power Ground Control Power Common
H1-2 24 VAC Power VAC Control Power Voltage
H2-1 GND REF Common
Comp2 Suction Temperature
H2-2 ST2 Input Analog
H2-3,4 LP2 Input Digital Comp2 Low Pressure
H2-5,6 HP2 Input Digital Comp2 High Pressure
H3-1 12 VDC Input VDC
Base/Expansion Interface
H3-2 12V A2L Input VDC
H3-3 TXD COM UART
H3-4 RXD COM UART
H3-5 GND REF Common
H4-1 GND REF Common
Entering Water Temperature
H4-2 EWT Input Analog
H4-3 GND REF Common
Return Air Temperature
H4-4 RAT Input Analog
H5-1 GND REF Common
Hot Gas Reheat Valve
H5-2 HGR Output 24 VAC
H5-3 GND REF Common
Waterside Economizer Valve
H5-4 WSE Output 24 VAC
H5-5 PWM Output PWM Variable Speed Blower Motor
H6-1 GND REF Common
Compressor Stage 2
H6-2 COMP2 Output 24 VAC
H6-3 GND REF Common
Comp2 Reversing Valve
H6-4 RV2 Output 24 VAC
H6-5 GND REF Common
Auxiliary Heat 2
H6-6 AUX2 Output 24 VAC
H6-7 GND REF Common
Auxiliary Heat 1 / Hydronic
Heat
H6-8 AUX1 Output 24 VAC
TB1-1 C REF Common Input Common
TB1-2 RH Input Analog Space Relative Humidity
TB1-3 HST Input 24VAC Humidistat
TB1-4 W3 Input 24VAC Thermostat - Stage 3 Heat
TB1-5 W4 Input 24VAC
Thermostat - Stage 4 Heat or
Stage 3 Cool
TB1-6 R Output 24 VAC Thermostat - 24 VAC Power