Daikin MT6210 - Functionality

5
IM 1365-1
WWW.DAIKINAPPLIED.COM
INTRODUCTION
Functionality
The MT6210 A2L leak detection control is an accessory control
that allows Daikin Applied equipment to meet the requirements
dened in UL 60335-2-40 for units utilizing A2L refrigerants. The
purpose of the MT6210 control is to activate the appropriate
mitigation actions either directly using relay logic, indirectly by
communicating to a unit controller, or a combination of both
methods.
NOTICE
A controller is not provided on every unit supplied by Daikin Applied. Daikin
Applied is providing the equipment required for leakage mitigation detection
with this control board and the leakage sensors but wiring and further unit
system control logic may be required in the eld.
The mitigation actions are dened by the specic appliance in
which the controller is installed, and the following inputs/outputs
are available:
1. Modbus “Client” serial communications with up to eight (8)
approved refrigerant leak detection sensors.
2. 5VDC power supply for up to 300mA combined load on any
one sensor or sensor network.
3. Modbus “Server” serial communications with a compatible
unit controller.
4. 2 each binary outputs (5VDC) to communicate system
events:
— One for leak events (Alarm)
— One for system errors, i.e. loss of sensor
communications (Fault)
5. 2 each relay outputs (dry contacts):
— One set of normally open contacts for mitigation
activation (redundant contacts).
— One set of normally open contacts for building owner
notication.
6. Relay logic is summarized in Table 6 on page 9.