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Zone

Inputs & Outputs

SA E-BUS Controller Technical Guide

R1-R4 - User-Conﬁ gurable Relay Outputs

Conﬁ gure relays as indicated by the factory wiring diagram when

mounted controls are used. The options are listed in Table 2 below.

BI1 - Water Proof of Flow Input A

This input is for the Water Proof of Flow Switch for a single SA Unit or

for Unit A of a Dual SA Unit. If the Water Proof of Flow Switch contact

opens while the Condenser Valve is operating, the Unit will enter Water

Proof of Flow Failure mode. In this mode, the mechanical cooling will

deactivate and the Condenser Valve will be forced to 100%. The Unit

will exit this mode when the Water ﬂ ow Switch is closed again and

Water Flow is proven.

BI2 - Water Proof of Flow Input B

This input is for the Water Proof of Flow Switch for Unit B of a Dual

SA Unit. If the Water Proof of Flow Switch contact opens while the

Condenser Valve is operating, the Unit will enter Water Proof of Flow

Failure mode. In this mode, the mechanical cooling will deactivate and

the Condenser Valve will be forced to 100%. The Unit will exit this

mode when the Water ﬂ ow Switch is closed again and Water Flow is

proven.

BI3 - Air Proof of Flow Input

An Air Proof of Flow Switch that provides a wet contact closure when-

ever the HVAC Unit Supply Fan is operating can be connected to this

input. If the Air Proof of Flow Switch contact opens while the Supply

Fan is operating, all Heating and Cooling is suspended or disabled.

The Air Proof of Flow Switch is an optional input. This means that you

must conﬁ gure the SA E-BUS Controller to recognize this input signal.

BI4 - Remote Forced Occupied Mode Input

When this wet contact input closes, it will force the SA E-BUS Con-

troller into the Occupied Mode. When the Remote Forced Occupied

Signal is removed, the controller will revert to the Unoccupied Mode

of operation if no internal or external schedule has been conﬁ gured or

is in effect when this occurs.

BI5 - Emergency Shutdown Input

This wet contact input is used to initiate shutdown of the HVAC Unit

when an N.C. Smoke Detector (by others), Firestat (by others), or other

shutdown condition (by others) contact is opened. The controller remains

active and can initiate alarm relays.

BI6 - Drain Pan Overﬂ ow Input A

This input is for the Drain Pan Overﬂ ow Switch for a single SA Unit

or for Unit A of a Dual SA Unit. When the drain pan is in an overﬂ ow

condition, a Drain Pan Overﬂ ow Switch will provide a 24 VAC wet

contact closure to this input. When this contact closure is initiated, the

controller will enter Drain Pan Overﬂ ow Failure Mode and deactivate

mechanical cooling.

BI7 - Drain Pan Overﬂ ow Input B

This input is for the Drain Pan Overﬂ ow Switch for Unit B of a Dual

SA Unit. When the drain pan is in an overﬂ ow condition, a Drain Pan

Overﬂ ow Switch will provide a 24 VAC wet contact closure to this

input. When this contact closure is initiated, the controller will enter

Drain Pan Overﬂ ow Failure Mode and deactivate mechanical cooling.

BI8 - Dirty Filter Contact Closure Input

This wet contact input is required for Filter Status Indication and requires

a Differential Pressure Switch to initiate “Dirty Filter” indication.

SA Expansion Module Binary Inputs

Table 2: User-Conﬁ gurable Relay Outputs

No. Relay Description Details

1 Heating Stages Conﬁ gure (1) Relay for each stage of heat. Conﬁ gure (1) Relay for Mod heat.

2 Cooling Stages Conﬁ gure (1) Relay for each stage of cooling. For Chilled Water, conﬁ gure (1) Relay for cooling.

3 Warm-Up Mode (VAV Boxes) Conﬁ gure (1) Relay for Warm-Up Mode when Non-Orion VAV/Zone Controllers are used.

4 Reversing Valve (Heat Pumps) Conﬁ gure (1) Relay for Reversing Valve operation. Can be conﬁ gured for heating or cooling.

5 Reheat (Dehumidiﬁ cation) Conﬁ gure (1) Relay for On/Off reheat when used.

Pre-Heater

(low ambient protection)

Conﬁ gure (1) Relay for pre-heat coil when required. Activated when the Entering Air Temperature

drops below the Ambient Protection Setpoint.

7 Alarm Conﬁ gure (1) Relay to initiate an alarm output when any SA E-BUS Controller alarm occurs.

8 Override Conﬁ gure (1) Relay to initiate an output signal when Space Temperature override button is pushed.

9 Occupied

Conﬁ gure (1) Relay to initiate an output signal any time the SA E-BUS Controller is in Occupied

Mode.

10 Water Side Economizer

Conﬁ gure (1) Relay to initiate an output signal any time the SA E-BUS Controller is in Economizer

Mode.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 73 74

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