BAS-SVX090B-EN
11
Device Connections
Symbio 500 controller supports the following device connections:
Table 1. Device connections
Connection
Quan-
tity Types Range
Notes
Analog Input (AI1 to
AI5))
5
Thermistor
10kΩ – Type II, 10kΩ – Type
III, 2252Ω – Type II, 20kΩ –
Type IV, 100 kΩ
These inputs can be configured for timed override capability.
Supports *, ** for Trane Zone Sensors.
RTD Balco™ (Ni-Fe) 1kΩ, 385 (Pt)
1kΩ, 375 (Pt) 1kΩ, 672 (Ni)
1kΩ,
Setpoint
(Thumbwheel)
189Ω to 889Ω
Resistive 100Ω to 100kΩ Typically used for fan speed switch.
Universal input (UI1
and UI2)
2
Linear Current 0–20mA
These inputs may be configured to be thermistor or resistive inputs,
0– 10 Vdc inputs, or 0–20 mA inputs.
Linear Voltage 0–10Vdc
Thermistor
10kΩ – Type II, 10kΩ – Type
III, 2252Ω – Type II, 20kΩ –
Type IV, 100 kΩ
RTD
Balco™ (Ni-Fe) 1kΩ, 385 (Pt)
1kΩ, 375 (Pt) 1kΩ, 672 (Ni)
1kΩ,
Setpoint
(Thumbwheel)
189Ω to 889Ω
Resistive 100Ω to 100kΩ
Binary Dry contact Low impedance relay contact.
Pulse Accumulator Solid state open collector Minimum dwell time is 25 milliseconds ON and 25 milliseconds OFF.
Binary input (BI1 to
BI3)
3 24 Vac detect The controller provides the 24Vac that is required to drive the binary
inputs when using the recommended connections.
Binary Outputs
(BO1 to BO3)
3
Form C Relay 0.5A @ 24Vac pilot duty
Ranges given are per contact. Power needs to be wired to the binary
output. All outputs are isolated from each other and from ground or
power.
Note: Class 1 voltages shall not be used on Symbio 400–B/500
controllers.
Binary Outputs
(BO4 to BO9)
6 Triac
0.5A @ 24Vac resistive and
pilot duty
Ranges given are per contact and power comes from the TRIAC
SUPPLY circuit. Use for modulating TRIACs. User determines
whether closing high side (providing voltage to the grounded load) or
low side (providing ground to the power load).
Analog Output /
Binary Input (AO1/
BI4 and AO2/ BI5)
2
Linear Current 0 - 20mA
Each termination must be configured as either an analog output or
binary input.
Linear Voltage 0 - 10Vdc
Binary Input Dry contact
Pulse Width
Modulation
80 Hz signal @ 15Vdc
Pressure Inputs
(PI1 and PI2)
2 0 - 5 In H20 Pressure inputs supplied with 5 volts (designed for Kavlico™
pressure transducers).
Point total 23
Expansion Modules
The Symbio 500 controller has 23 on-board points. The controller can be point-expanded by using
expansion modules. The Symbio 500 can have an additional 110 points, for a total of 133 points
General Information
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