39
Table 20 — 50BVJ,W Standard I/O Table
LEGEND
* Inputs and outputs are optional. Sensors not provided. 50BV units do
not contain a return fan; return fan control is available for return fan
separate from 50BV unit.
† Read-only points. No effect on Sequence of Operation.
NOTE: Transformer
’
s common terminals are tied together.
INPUT /OUTPUT TYPE
TYPICAL DEVICE
TYPE OF I/O
CONNECTION
PIN
NUMBERS
I/O TYPE
CONFIG
I/O FLEX 6126 Controller
Inputs
Occupancy Override *
Dry Contact (N.O)
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-12 - 19 & 20
DI
Duct Static Pressure Sensor
0 -5 VDC
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-11 -17 & 18
AI
Compressor Status (compressor 4)
IEM 2
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-10 - 16 & 17
DI
Compressor Status (Compressors 1-3)
IEM 1
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-09 - 14 & 15
DI
Return Air Sensors
10K Type II
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-08 - 13 & 14
AI
Entering Water Temperature (required for Economizer)
10K Type II
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-07 - 11 & 12
AI
Supply Air Temperature Sensor
10K Type II
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-06 - 10 & 11
AI
Relative Humidity Sensor*†
0-5 VDC
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-05 - 8 & 9
AI
CO
2
Sensor (Required for demand control ventilation)*
0-5 VDC
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-04 - 7 & 8
AI
Leaving Water Temperature Sensor (standard)
10K Type II
UI (0-10 V, RTD Therm/Dry, 0-20 mA)
UI-03 - 5 & 6
AI
UPM II - Compressors 2 & 4
UI Pulse Counting (0-20 mA)
UI-02 - 2 & 4
DI - pulse
UPM II - Compressors 1 & 3
UI Pulse Counting (0-20 mA)
UI-01 - 2 & 3
DI - pulse
Outputs
Open
AO (0-10 V)
AO-6 - 11 & 12
AO
Open
AO (0-10 V)
AO-5 - 9 & 10
AO
Return Fan Speed (VFD Drive Terminal Strip)*
ABB ACH550-UH
AO (0-10 V)
AO-4 - 7 & 8
AO
Open
AO (0-10 V)
AO-3 - 5 & 6
AO
Modulating Hot Gas Re-heat Valves
AO (4-20mA/0-10 V)
AO-2 - 3 & 4
AO
Fan Speed - (VFD Drive Terminal Strip AI-1)
ABB ACH550-UH
AO (4-20mA/0-10 V)
AO-1 - 1 & 2
AO
Compressor Stage 4 Command (Y4)
BO (Relay 5A at 250Vac)
BO-6 - 16-18
BO
Compressor Stage 3 Command (Y3)
BO (Relay 5A at 250Vac)
BO-5 - 13-15
BO
Compressor Stage 2 Command (Y2)
BO (Relay 5A at 250Vac)
BO-4 - 10-12
BO
Compressor Stage 1 Command (Y1)
BO (Relay 5A at 250Vac)
BO-3 - 7-9
BO
Open
BO (Relay 5A at 250Vac)
BO-2 - 4-6
BO
Supply Fan Enable signal (VFD Drive Terminal Strip)
ABB ACH550-UH
BO (Relay 5A at 250Vac)
BO-1 - 1-3
BO
Xnet Remote Expansion
I/O Flex EX8160
expander
I/O Expansion Board
Xnet
Comm-Port
AI
—
Analog Input
AO
—
Analog Output
BI
—
Digital Input
BO
—
Digital Output
UI
—
Universal Input