4
Fig. 3 — Control Panel Abbreviations
Table 3 — 23XRV IOB2 Connections
a,b,c
NOTE(S):
a.
See Fig. 6 for IOB2 wiring diagram.
b. For pressure readings, only Vout (output) terminal is indicated. See Fig. 6 for Vin (+) and ground (–).
c. Defaults are shown. In some cases the IOB can be configured differently depending on job requirements.
DESCRIPTION CHANNEL TERMINAL TYPE OPTIONAL
Entering Evaporator Water Pressure AI3 J16-3,7 Signal, J11-1 +5V Optional Field Connections 7TB-36 (reference), 7TB-37 (Vout), 7TB-64 (Vin)
Leaving Evaporator Water Pressure AI4 J16-4,8 Signal, J11-2 +5V Optional Field Connections 7TB-38 (reference), 7TB-39 (Vout), 7TB-65 (Vin)
Entering Condenser Water Pressure AI5 J15-6,12 Signal, J11-3 +5V Optional Field Connections 7TB-41 (reference) 7TB-40 (Vout), 7TB-66 (Vin)
Leaving Condenser Water Pressure AI6 J15-5,11 Signal, J11-4 +5V Optional Field Connections 7TB-43 (reference), 7TB-42 (Vout), 7TB-67 (Vin)
Common Chilled Water Supply AI7 J15-4,10 5K Ohm Optional Field Connections 7TB-60,61
Evaporator Water Flow Measurement AI8 J15-3,9 4-20mA Optional Field Connections 7TB-44,45 (Channel 8 on SW2 dip switch must be ON)
Condenser Water Flow Measurement AI9 J15-2,8 4-20mA Optional Field Connections 7TB-46,47 (Channel 9 on SW2 dip switch must be ON)
Common Chilled Water Return AI10 J15-1,7 5K Ohm Optional Field Connections 7T-58,59
Head Pressure Output 2 AO3 J14-3,6 4-20mA Optional Field Connections 7TB-56,57
Chilled Water Pump DO1 J12-6,7 24 VAC —
Condenser Water Pump DO2 J12-9,10 24 VAC —
LEGEND
IOB — Input/Output Board
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