System information

Table 4 — IOB3 Connections at User’s Terminal Block

NOTES:

1. See Fig. 8 for IOB3 wiring diagram.

2. For pressure readings, only Vout (output) terminal is indicated.

See Fig. 8 for Vin (+) and ground (–).

3. Defaults are shown. In some cases the IOB can be configured

differently depending on job requirements.

Table 5 — IOB4 Connections at User’s Terminal Block

NOTES:

1. See Fig. 9 for IOB4 wiring diagram.

2. For pressure readings, only Vout (output) terminal is indicated.

See Fig. 9 for Vin (+) and ground (–).

3. Defaults are shown. In some cases the IOB can be configured

differently depending on job requirements.

LEGEND FOR FIG. 6-13

DESCRIPTION CHANNEL TERMINAL TYPE OPTIONAL

Bearing Temperature 1 AI1 J16-1,5 5 k —

Bearing Temperature 2 AI2 J16-2,6 5 k —

Bearing Temperature 3 AI3 J16-3,7 5 k —

Bearing Temperature 4 AI4 J16-4,8 5 k —

Remote Temperature AI5 J15-6,12 5 k Ye s

IGV1 Position Feedback AI6 J15-5,11 4-20 mA —

Auto Water Temperature Reset AI8 J15-3,9 4-20 mA Yes

Head Pressure Output AO1 J14-1,4 4-20 mA Yes

HGBP Valve Feedback Fully Open DI1 J13-5 24 VAC —

HGBP Valve Feedback Fully Close DI2 J13-6 24 VAC —

Spare Safety DI3 J13-7 (4TB-12) 24 VAC —

Bearing Shaft Displacement Sensor DI4 J13-8 24 VAC —

HGBP Solenoid / Open DO1 J12-7 24 VAC —

HGBP Close DO2 J12-10 24 VAC —

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

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

Evaporator Flow Switch DI1 J13-5 24 VAC Yes

Condenser Flow Switch DI2 J13-6 24 VAC Yes