8BAS-SVX065E-EN
Device Connections
The following table provides details of the hardware termination configuration options The
hardware terminations are pre-configured for proper equipment operation for blower coil/fan coil
applications
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Table 2. Connections
Connection Quantity Types Range Notes
Analog input
(AI1 to AI5) 5
Temperature 10 kΩ thermistor AI1 to AI4 can be configured for timed override
capability.
Setpoint 189 Ω to 889 Ω
Resistive 100 Ω to 100 kΩ Typically used for fan speed switch.
Universal input
(UI1 and UI2) 2
Linear 0–20 mA
These inputs may be configured to be thermistor or
resistive inputs, 0–10 Vdc inputs, or 0–20 mA inputs.
Linear 0–10 Vdc
Temperature 10 kΩ thermistor
Setpoint 189 Ω to 889 Ω
Resistive 100 Ω to 100 kΩ
Binary Open collector/dry contact Low impedance relay contacts recommended.
Pulse Solid state open collector Minimum dwell time is 25 milliseconds On and 25
milliseconds Off.
Binary input
(BI1 to BI3)(a) 3
24 Vac detect The UC400 controller provides the 24 Vac required to
drive the binary inputs when using the recommended
connections.
Binary output
(BO1 to BO3)
(a)
3UC400:Relay
• 2.88 A @24 Vac C pilot
duty
• Gen Purpose
–10 A max up 277 Vac
–10 A max up to 30 Vdc
• Motor Duty
–1/3 hp @ 125 VAC
(7.5 A max)
–1/2 hp @ 277 VAC
(7.5 A max)
Power needs to be wired to the binary output. All
outputs are isolated from each other and from ground
or power.
Note: Ranges given are per contact.
Other
Ranges UC400–B:TRIAC 24 Vac Powered
Binary output
(BO4 to BO9)(a) 6 TRIAC
•UC400: 0.5 A max @24-
277 Vac, resistive and pilot
duty
•UC400–B: 24 Vac
Powered
Use for modulating TRIAC. User determines whether
closing high side (providing voltage to the grounded
load) or low side (providing ground to the power
load).
Note: Ranges given are per contact and power comes
from TRIAC SUPPLY circuit.
