Tables 46-48 show the input and output channel designations.

Table 46 — I/O Channel Designations Base Module — CV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

SPT (CCN) — 10KV Thermistor

T23-25

Compressor 2 Safety — DI (24 vac)

T3-4

STO (CCN) — 10KV Thermistor

T24-25

Outside Air Enthalpy — DI (24 vac)

T5-6

OAT — 5KV Thermistor

T26-27

Economizer Pos. — AO (4-20 mA)

T7-8

SAT — 5KV Thermistor

T28-29

Heat 1 Relay — DO (24 vac)

T9-10

—

T30-29

Heat 2 Relay — DO (24 vac)

T11-12

SAT Reset — AI (4 to 20 mA)

T31-32

CV Power Exhaust 1/Modulating Power Exhaust — DO (115 vac)

T13-14

IAQ Indoor — AI (4 to 20 mA)

T33-32

CV Power Exhaust 2 — DO (115 vac)

T15-16

IAQ Outdoor — AI (4 to 20 mA)

T34-35

Condenser Fan — DO (115 vac)

T17-25

Y1 or Remote Start/Stop — DI (24 vac)

T36-35

OFC2 — DO (115 vac)

T18-25

Y2 — DI (24 vac)

T37-38

—

T19-25

W1 — DI (24 vac)

T39-38

—

T20-25

W2 — DI (24 vac)

K1

Indoor Fan Relay — DO (LV)

T21-25

G — DI (24 vac)

K2

Compr. 1 — DO (HV)

T22-25

Compressor 1 Safety — DI (24 vac)

K3

Compr. 2 — DO (HV)

Table 47 — I/O Channel Designations Base Module — VAV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

SPT (CCN) — 10KV Thermistor

T23-25

Compressor 2 Safety — DI (24 vac)

T3-4

RAT — 5KV Thermistor

T24-25

Outside Air Enthalpy — DI (24 vac)

T5-6

OAT — 5KV Thermistor

T26-27

Economizer Pos. — AO (4-20 mA)

T7-8

SAT — 5KV Thermistor

T28-29

Heat 1 Relay - DO (24 v)

T9-10

—

T30-29

Heat Interlock Relay — DO (24 v)

T11-12

SAT Reset — AI (4 to 20 mA)

T31-32

Modulated Power Exhaust — DO (24 vac)

T13-14

IAQ Indoor — AI (4 to 20 mA)

T33-32

—

T15-16

IAQ Outdoor — AI (4 to 20 mA)

T34-35

Condenser Fan — DO (115 vac)

T17-25

Remote Start/Stop — DI (24 vac)

T36-35

OFC2 — DO (115 vac)

T18-25

—

T37-38

Unloader 1 — DO (115 vac)

T19-25

—

T39-38

Unloader 2 — DO (115 vac)

T20-25

—

K1

Indoor Fan Relay — DO (LV)

T21-25

—

K2

Compr. 1 — DO (HV)

T22-25

Compressor 1 Safety — DI (24 vac)

K3

Compr. 2 — DO (HV)

Table 48 — I/O Channel Designations Expansion Module (Field-Installed) — CV and VAV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

—

T23 and TB2-1

Fire — Evacuation — DI (24 vac)

T3-4

—

T24 and TB2-1

Fire — Smoke Purge — DI (24 vac)

T5-6

—

T26-27

—

T7-8

—

T28-29

—

T9-10

—

T30 and TB2-2

Alarm Light Indicator — DO (24 vac)

T11-12

—

T31

Power Exhaust Fire No. 1 — DO (115 vac)

T13-14

—

T33

Power Exhaust Fire No. 2 — DO (115 vac)

T15-16

—

T34

Power Exhaust Fire No. 3 — DO (115 vac)

T17 and TB2-1

Fan Status — DI (24 vac)

T36

Power Exhaust Fire No. 4 — DO (115 vac)

T18 and TB2-1

Filter Status - DI (24 vac)

T37

—

T19 and TB2-1

Field Applied Status — DI (24 vac)

T39

—

T20 and TB2-1

Demand Limit — DI (24 vac)

K1

—

T21 and TB2-1

Fire — Unit Shutdown — DI (24 vac)

K2

—

T22 and TB2-1

Fire — Pressurization — DI (24 vac)

K3

—

 

 

 

LEGEND (Tables 46-48)

AI

—

Analog Input

OAT — Outdoor-Air Temperature

AO

—

Analog Output

OFC — Outdoor Fan Contactor

CCN —

Carrier Comfort Network RAT — Return-Air Temperature

CV

—

Constant Volume

SAT — Supply-Air Temperature

DI

—

Direct Input

SPT — Space Temperature

DO

—

Direct Output

STO — Space Temperature Offset

HV

—

High Voltage

T

— Terminal

IAQ —

Indoor Air Quality

TB

— Terminal Block

KV

—

Kilo-Ohms

VAV — Variable Air Volume

LV

—

Low Voltage

 

 

NOTE: All even numbered terminals are negative (–) polarity and all odd numbered terminals are positive (+) polarity.

115

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Carrier 48AY020-060 O Channel Designations Base Module CV, O Channel Designations Base Module VAV, Terminal no Assignment
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