Daikin MicroTech MT2300 Operation Manual page 5

CONNECTIONS AND TERMINALS
Unit Controller and Control Modules
I/O Descriptions
Table 1: MT2300 unit controller connector and terminal
descriptions
Connector I/O Type
H1-1 24 VAC Power
H1-2 GND Power
H1-3 12V A2L Input
H1-4 12 VDC Output
H1-5 A2L FLT Input
H2-1 LWT Input
H2-2 GND REF
H2-3 DAT Input
H2-4 GND REF
H2-5 ST1 Input
H2-6 GND REF
H2-7 COF Input
H3-1 12 VDC Output
H3-2 12V A2L Output
H3-3 RXD COM
H3-4 TXD COM
H3-5 GND COM
H4-1 B(+) COM
H4-2 A(-) COM
H4-3 GND COM
H5-1 GND REF
H5-2 RV Output
H6-1 N/C Output
H6-2 N/O Output
H6-3 GND REF
H7-1,2 HP1 Input
H7-3,4 LP1 Input
TB1-1 R Output
TB1-2 W2 Input
TB1-3 W1 Input
TB1-4 Y2 Input
TB1-5 Y1 Input
TB1-6 G Input
TB1-7 C REF
TB2-1 LED Output
TB2-2 FM Input
TB2-3 SP Input
TB2-4 RM Input
TB2-5 GND REF
TB3-1 E Input
TB3-2 U Input
TB4-1,2 ALM Output
BLOWER VIN Input
BLOWER LOW Output
BLOWER MAIN Output
LIVE
Comp1 Output
(Relay)
LIVE x 3 24V/L1 Input
OM 1364-1
Signal Description
VAC Control Power Voltage
Ground Control Power Common
VDC A2L Sense Voltage
VDC A2L Mitigation Voltage
Digital A2L Fault Alarm
Analog
Leaving Water Temperature
Common
Analog
Discharge Air Temperature
Common
Analog
Comp1 Suction Temperature
Common
Analog Condensate Overflow
VDC
VDC
Base/Expansion Board
UART
Interface
UART
UART
N/A
N/A Future Use
N/A
Common
Comp1 Reversing Valve
24 VAC
Pump Request - Normally
24 VAC Closed Terminal for Normally
Open Valves
Pump Request - Normally Open
24 VAC Terminal for Normally Closed
Valves
Common Pump Request
Digital Comp1 High Pressure
Digital Comp1 Low Pressure
24 VAC Thermostat 24 VAC Power
24 VAC Thermostat Heat Stage 2
24 VAC Thermostat Heat Stage 1
24 VAC Thermostat Cool Stage 2
24 VAC Thermostat Cool Stage 1
24 VAC Thermostat Fan
Common Thermostat Common
5 VDC Room Sensor LED
Analog Room Sensor Fan/Mode
Analog Room Sensor Setpoint Adjust
Room Sensor Air Temp /
Analog
Tennant Override
Common Room Sensor
Digital Emergency Shutdown
Digital Unoccupied Sensor
Digital Alarm Output - Contact Closure
VAC Blower Motor Voltage
VIN Blower Motor Low Speed
Blower Motor High Speed or
VIN
ECM
L1/24V Compressor Stage 1
VAC COMP1 Line1 Control Voltage
Connector I/O Type
COM/
LIVE x 3 Input
NEU/L2
Daughter
BACnet COM
Board
Table 2: MT2310 I/O board connectors and terminals
Connector I/O Type
H1-1 GND Power
H1-2 24 VAC Power
H2-1 GND REF
H2-2 ST2 Input
H2-3,4 LP2 Input
H2-5,6 HP2 Input
H3-1 12 VDC Input
H3-2 12V A2L Input
H3-3 TXD COM
H3-4 RXD COM
H3-5 GND REF
H4-1 GND REF
H4-2 EWT Input
H4-3 GND REF
H4-4 RAT Input
H5-1 GND REF
H5-2 HGR Output
H5-3 GND REF
H5-4 WSE Output
H5-5 PWM Output
H6-1 GND REF
H6-2 COMP2 Output
H6-3 GND REF
H6-4 RV2 Output
H6-5 GND REF
H6-6 AUX2 Output
H6-7 GND REF
H6-8 AUX1 Output
TB1-1 C REF
TB1-2 RH Input
TB1-3 HST Input
TB1-4 W3 Input
TB1-5 W4 Input
TB1-6 R Output
5
Signal Description
VAC COMP1 Line2 Control Voltage
SPI BACnet MS/TP Only
Signal Description
Ground Control Power Common
VAC Control Power Voltage
Common
Comp2 Suction Temperature
Analog
Digital Comp2 Low Pressure
Digital Comp2 High Pressure
VDC
VDC
UART
Base/Expansion Interface
UART
Common
Common
Entering Water Temperature
Analog
Common
Return Air Temperature
Analog
Common
Hot Gas Reheat Valve
24 VAC
Common
Waterside Economizer Valve
24 VAC
PWM Variable Speed Blower Motor
Common
Compressor Stage 2
24 VAC
Common
Comp2 Reversing Valve
24 VAC
Common
Auxiliary Heat 2
24 VAC
Common
Auxiliary Heat 1 / Hydronic
Heat
24 VAC
Common Input Common
Analog Space Relative Humidity
24VAC Humidistat
24VAC Thermostat - Stage 3 Heat
Thermostat - Stage 4 Heat or
24VAC
Stage 3 Cool
24 VAC Thermostat - 24 VAC Power
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