Specifications

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 — T33-32 CV Power Exhaust2—DO(115vac)
T15-16 — 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)
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 — T33-32 —
T15-16 — 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 Unloader1—DO(115vac)
T19-25 — T39-38 Unloader2—DO(115vac)
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)
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 IAQ Indoor — AI (4 to 20 mA) T31 Power Exhaust Fire No.1—DO(115vac)
T13-14 IAQ Outdoor — AI (4 to 20 mA) T33 Power Exhaust Fire No.2—DO(115vac)
T15-16 — T34 Power Exhaust Fire No.3—DO(115vac)
T17 and TB2-1 Fan Status — DI (24 vac) T36 Power Exhaust Fire No.4—DO(115vac)
T18 and TB2-1 Filter Status − DI (24 vac) T37 Modulating Power Exhaust No. 5
T19 and TB2-1 Field Applied Status — DI (24 vac) T39 Modulating Power Exhaust No. 6
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
AI — Analog Input
AO — Analog Output
CCN — Carrier Comfort Network
CV — Constant Volume
DI — Direct Input
DO — Direct Output
HV — High Voltage
IAQ — Indoor Air Quality
KV — Kilo-Ohms
LV — Low Voltage
OAT — Outdoor-Air Temperature
OFC — Outdoor Fan Contactor
RAT — Return-Air Temperature
SAT — Supply-Air Temperature
SPT — Space Temperature
STO — Space Temperature Offset
T—Terminal
TB — Terminal Block
VAV — Variable Air Volume
NOTE: All even numbered terminals are negative (−) polarity
and all odd numbered terminals are positive (+) polarity.
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