4
Table 3 — 19XR6/7 IOB1 Connections
NOTES:
1. See Fig. 2 for IOB1 wiring diagram.
2. For pressure readings, only Vout (output) terminal is indicated.
See Fig. 2 for Vin (+) and ground (–).
3. Defaults are shown. In some cases the IOB can be configured
differently depending on job requirements.
Table 4 — 19XR6/7 IOB2 Connections
NOTES:
1. See Fig. 3 for IOB2 wiring diagram.
2. For pressure readings, only Vout (output) terminal is indicated.
See Fig. 3 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
Entering Chilled Water Temperature
AI1
J16-1,5
5 k
—
Leaving Chilled Water Temperature
AI2
J16-2,6
5 k
—
Entering Condenser Water Temperature
AI3
J16-3,7
5 k
—
Leaving Condenser Water Temperature
AI4
J16-4,8
5 k
—
Evaporator Refrigerant Liquid Temperature
AI5
J15-6,12
5 k
—
Discharge Gas Temperature
AI6
J15-5,11
5 k
—
Condenser Pressure
AI7
J15-4
5 VDC
—
Evaporator Pressure
AI8
J15-3
5 VDC
—
Economizer Pressure
AI9
J15-2
5 VDC
—
FS VFD Load Current
AI10
J15-1,7
4 to 20 mA
Yes
Chiller Status Output (ON=20mA, OFF=4mA,
TRIPOUT=8mA, Not Off and Compressor not running=12mA)
AO1
J14-1,4
4 to 20 mA
Yes
Oil EXV Output
AO2
J14-2, 5
4 to 20 mA
Yes
Chiller Lockout Input
DI1
J13-5 (4TB-2)
24 VAC
Yes, NO (dry contact)
Fire Alarm Interlock
DI2
J13-6 (4TB-4)
24 VAC
Yes, NO (dry contact)
Remote Contact Input
DI3
J13-7 (4TB-6)
24 VAC
Yes, NO (dry contact); closed indicates
start chiller signal
Remote Emergency Stop Input
DI4
J13-8 (4TB-8)
24 VAC
Yes, NO (dry contact); closed indicates
stop chiller signal
Stage 1 IGV Increase
DO1
J12-7
24 VAC
Yes
Stage 1 IGV Decrease
DO2
J12-10
24 VAC
Yes
Chiller Alarm Relay
DO3
J12-2
24 VAC
Yes
Chiller Alert Relay
DO4
J12-5
24 VAC
Yes
LEGEND
EXV — Electronic Expansion Valve
FS — Fire Security
IGV — Inlet Guide Vane
IOB — Input/Output Board
NO — Normally Open
VFD — Variable Frequency Drive
DESCRIPTION
CHANNEL
TERMINAL
TYPE
OPTIONAL
Motor Winding Temperature 1
AI1
J16-1,5
5 k
—
Motor Winding Temperature 2
AI2
J16-2,6
5 k
—
Motor Winding Temperature 3
AI3
J16-3,7
5 k
—
Oil Supply Temperature
AI4
J16-4, 8
5 k
Yes
Oil Sump Temperature
AI5
J15-6,12
5 k
—
Oil Supply Pressure
AI6
J15-5
5 VDC
—
Oil Sump Pressure
AI7
J15-4
5 VDC
—
Auto Demand Limit Input
AI8
J15-3,9
4 to 20 mA
Yes
Refrigerant Leak Sensor
AI9
J15-2,8
4 to 20 mA
Yes
Displacement Switch
AI10
J15-7
Ohm
—
Guide Vane 1 Output
AO1
J14-1,4
4 to 20 mA
—
Damper Valve Feedback Fully Open
DI1
J13-5
24 VAC
—
Damper Valve Feedback Fully Close
DI2
J13-6
24 VAC
—
High Pressure Switch
DI3
J13-7,3
24 VAC
—
Ice Build Contact
DI4
J13-8,4, (4TB-12)
24 VAC
Yes, NO (dry contact)
Oil Heater Relay
DO1
J12-7
24 VAC
—
Oil Pump Relay
DO2
J12-10
24 VAC
—
Economizer Damper Valve Open
DO3
J12-2
24 VAC
—
Economizer Damper Valve Close
DO4
J12-5
24 VAC
—
LEGEND
IOB — Input/Output Board
NO — Normally Open