Output Wiring - Distech Controls ECB-PTU Series Installation Manual

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
ECB-PTU-107
ECB-PTU-207
ECB-PTU-208
ECB-PTU-307
ECB-PTU-308
Table 4: 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.
Figure 11: Powered Relay Outputs
Wiring Relay Contact Outputs
The ECB-PTU-107, ECB-PTU-207, ECB-PTU-208 and ECB-PTU-308 have one (1) relay contact output (DO4-C4) which can switch up to 9 A (resistive)
for electric heater control up to 255 VAC. For example, this output can handle electric heaters up to 2 kW @ 230 VAC.
The ECB-PTU-307 has two (2) relay contact outputs (DO4-C4 and DO11-C11) which can switch up to 6 A (resistive) for electric heater control up to 255
VAC. For example, this output can handle electric heaters up to 1.4 kW @ 230 VAC.
If more power is needed, a relay must be connected to the relay contact output.
£ All relay contact output connectors accept wires between 1.5 mm² (16 AWG) and 2.5 mm² (14 AWG). Select proper gauge according
to the current load.
£
All digital relay contact outputs are normally open.
£
Heater relay outputs are unpowered. You must use the same Live conductor (power source) to power the heater as the one used to
power the controller.
£
It is recommended to use an appropriate external protection if connected to a highly inductive load.
£ It is recommended to use a 10 A fast-acting, high-breaking fuse to protect the heater relay contact output against short circuit/over-
load conditions.
Figure 12: Relay Contact outputs - Electric Heater (I-Electric Heater < I-Max )
Analog Outputs
0
4
2
2
2
Digital Relay Contacts
(Fan)
3
3
3
3
3
Digital Relay Contacts
(Heater)
1
1
1
2
1
Digital (Triac) Outputs
2
2
2
4
4
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