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
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