5
Table 5 — 19XR6/7 IOB3 Connections
NOTES:
1. See Fig. 4 for IOB3 wiring diagram.
2. For pressure readings, only Vout (output) terminal is indicated.
See Fig. 4 for Vin (+) and ground (–).
3. Defaults are shown. In some cases the IOB can be configured
differently depending on job requirements.
Table 6 — 19XR6/7 IOB4 Connections
NOTES:
1. See Fig. 5 for IOB4 wiring diagram.
2. For pressure readings, only Vout (output) terminal is indicated.
See Fig. 5 for Vin (+) and ground (–).
3. Defaults are shown. In some cases the IOB can be configured
differently depending on job requirements.
DESCRIPTION
CHANNEL
TERMINAL
TYPE
OPTIONAL
Low Speed ME Bearing Temperature
AI1
J16-1,5
5 k
—
Low Speed CE Bearing Temperature
AI2
J16-2,6
5 k
—
High Speed ME Bearing Temperature
AI3
J16-3,7
5 k
—
High Speed CE Bearing Temperature
AI4
J16-4,8
5 k
—
Remote Reset Temperature
AI5
J15-6,12
5 k
Yes
Guide Vane 1 Actual Position
AI6
J15-5,11
4 to 20 mA
—
Common Chilled Water Supply (CHWS) Temperature
AI7
J15-4, 10
5 KOhm
Yes
Auto Water Temperature Reset
AI8
J15-3,9
4 to 20 mA
Yes
Common Chilled Water Return (CHWR) Temperature
AI9
J15-2, 8
5 KOhm
Yes
Head Pressure Output
AO1
J14-1,4
4 to 20 mA
Yes
EC/HGBP Valve Feedback Fully Open
DI1
J13-5
24 VAC
—
EC/HGBP Valve Feedback Fully Close
DI2
J13-6
24 VAC
—
Spare Safety
DI3
J13-7 (4TB-12)
24 VAC
Yes, NO (dry contact)
Power Request Feedback
DI4
J13- 8
24 VAC
Yes
EC/HGBP Solenoid / Open
DO1
J12-7
24 VAC
—
EC/HGBP Close
DO2
J12-10
24 VAC
—
Free Cooling Mode
DO3
J12-2
24 VAC
Yes
Power Request Output
DO4
J12-5
24 VAC
Yes
LEGEND
CE
— Compressor End
EC
— Envelop Control
HGBP — Hot Gas Bypass
IOB
— Input/Output Board
ME
— Motor End
NO
— Normally Open
DESCRIPTION
CHANNEL
TERMINAL
TYPE
OPTIONAL
Entering Evaporator Water Pressure
AI3
J16-7
5 VDC
Yes
Leaving Evaporator Water Pressure
AI4
J16-8
5 VDC
Yes
Entering Condenser Water Pressure
AI5
J15-6
5 VDC
Yes
Leaving Condenser Water Pressure
AI6
J15-5
5 VDC
Yes
Evaporator Water Flow Measurement
AI8
J15-3, 9
4 to 20 mA
Yes
Condenser Water Flow Measurement
AI9
J15-2, 8
4 to 20 mA
Yes
Chilled Water Pump (Variable)
AO1
J14-1, 4
4 to 20 mA
Yes
Condenser Water Pump (Variable)
AO2
J14-2, 5
4 to 20 mA
Yes
Tower Fan (Variable)
AO3
J14-3, 6
4 to 20 mA
Yes
Evap Water Flow Switch
DI1
J13-1, 5
24 VAC
Yes, NO (dry contact), closed = flow
Condenser Water Flow Switch
DI2
J13-2, 6
24 VAC
Yes, NO (dry contact), closed = flow
Customer Alert
DI3
J13-3, 7
24 VAC
Yes, NO (dry contact)
Free Cooling Start Switch
DI4
J13-4, 8
24 VAC
Yes, NO (dry contact), closed = flow
Chilled Water Pump
DO1
J12-7
24 VAC
Yes
Condenser Water Pump
DO2
J12-10
24 VAC
Yes
Tower Fan High
DO3
J12-2
24 VAC
Yes
Tower Fan Low
DO4
J12-5
24 VAC
Yes
LEGEND
IOB — Input/Output Board
NO — Normally Open