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Wiring Resistive Inputs (UIx - SIx)
This input configuration is used to monitor 10kΩ type II, type III, and type Z NTC sensors.
Figure9: Resistive input – 10 kΩ NTC Sensor input
Wiring Pulse Inputs (UIx - DIx - SIx)
Connect the pulse input according to the following figure for a pulse meter that can pull-down a +3.3 VDC supply with a 10 kΩ pull-up resistor for UIx and
SIX, and with a 1 kΩ pull-up resistor for DIx (Internal supply type).
Figure10: Pulse Input - DIx
Figure11: Pulse Input - UIx/SIx
Output Wiring
Depending on models, these controllers have physical connections for analog outputs, digital powered relay outputs, digital relay contact outputs, and
digital triac outputs. These outputs are all software-configurable.
All output wiring, except for electric heater outputs, must be connected using the provided detachable connectors. Electric heater output wiring is made
directly through the onboard connector.
Controller Analog Outputs Digital Relay Contacts
(Fan)
Digital Relay Contacts
(Heater)
Digital (Triac) Outputs
ECL-PTU-107 0 3 1 2
ECL-PTU-207 4 3 1 2
ECL-PTU-208 2 3 1 2
ECL-PTU-307 2 3 2 4
ECL-PTU-308 2 3 1 4
Table4:
Controller Output Support
Before connecting an output device (actuator, relay, etc.) to the controller, refer to the datasheet and installation
guide of the equipment manufacturer.
Wiring Powered Relay Outputs
Three (3) fan relay contact outputs (DO1, DO2 & DO3) can switch up to 3 A (inductive / resistive - total of all fan relay contact outputs) for fan speed con-
trol up to 240 VAC (the provided voltage is the same as the controller’s power supply).
£ All powered contact output connectors accept wires between 1 mm² (17 AWG) and 1.5 mm² (16 AWG). Select
proper gauge according to the current load.
£ All powered relay contact outputs are normally open.
£ It is recommended to use an appropriate external protection if connected to a highly inductive load.
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