BAS-SVX48H-EN
9
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)
3
UC400: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.
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