3
Table 1 — IOB Configuration
19DV IOB COMPONENTS AND WIRING
The components listed in Tables 2-5 are available at the user’s
terminal block on the IOB. Some are available only if the unit
is operating in Remote mode. Table 6 lists SIOB inputs and out-
puts. Figures 2-4 show IOB wiring diagrams and Fig. 5 is the
legend. Figures 6-9 show additional control wiring.
Table 2 — 19DV 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 3 — 19DV 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.
ANALOG INPUT
ANALOG OUTPUT
0
Disable
0
Disable
1
0 to 5 VDC
1
4 to 20 mA
2
4 to 20 mA
2
0 to 10 VDC
3
10 k
(thermistor)
4
5 k
(thermistor)
5
Ohm (Shift_Dis)
6
100 Ohm RTD
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
J15-4,10
5 VDC
—
Evaporator Pressure
AI8
J15-3,9
5 VDC
—
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
Evaporator Flow Switch
DI1
J13-5 (5TB-9,10)
24 VAC
Yes, NO (dry contact)
Condenser Water Flow Switch
DI2
J13-6 (5TB-11,12)
24 VAC
Yes, NO (dry contact)
Remote Contact
DI3
J13-7 (5TB-13,14)
24 VAC
Yes, NO (dry contact);
closed indicates start chiller signal
Remote Emergency Stop Input
DI4
J13-8 (5TB-15, 16)
24 VAC
Yes, NO (dry contact);
closed indicates stop chiller signal
Economizer Bypass Valve
DO1
J12-7
24 VAC
Yes
Refrigerant Pump
DO2
J12-10
24 VAC
—
Chiller Alarm Relay
DO3
J12-2 (5TB-3,4)
24 VAC
Yes
Vapor Venting Line SV (Free cooling option)
DO4
J12-5
24 VAC
Yes
LEGEND
IOB —
Input/Output Board
NO
—
Normally Open
SV
—
Solenoid Valve
DESCRIPTION
CHANNEL
TERMINAL
TYPE
OPTIONAL
Motor Winding Temperature 1
AI1
J16-1,5
5 k
—
EC/HGBP Valve Feedback
AI3
J16-3,7
4 to 20 mA
Yes
Pump Output Pressure
AI5
J15-6,12
5 VDC
—
Bearing Outlet Pressure
AI6
J15-5,11
5 VDC
—
Bearing Inlet Pressure
AI7
J15-4,10
5 VDC
—
Auto Demand Limit Input
AI8
J15-3,9 (5TB-23,24)
4 to 20 mA
Yes
Refrigerant Leak Sensor
AI9
J15-2,8 (5TB,25,26)
4 to 20 mA
Yes
Pump Input Pressure
AI10
J15-1,7
5 VDC
—
Guide Vane 1 Output
AO1
J14-1,4
4 to 20 mA
—
EC/HGBP Modulating Output
AO3
J14-3,6
4 to 20 mA
Yes
Liquid Level Switch
DI2
J13-6
24 VAC
—
High Pressure Switch
DI3
J13-7
24 VAC
—
Ice Build Contact
DI4
J13-8,4, (5TB-17,18)
24 VAC
Yes, NO (dry contact)
Condenser Control Valve
DO1
J12-7
24 VAC
—
Evaporator Control Valve
DO2
J12-10
24 VAC
—
Economizer Isolation Valve (Liquid Bypass Option)
DO4
J12-5
24 VAC
—
LEGEND
EC
—
Envelope Control
HGBP —
Hot Gas Bypass
IOB
—
Input/Output Board
NO
—
Normally Open
