I/O terminal blocks, ratings and requirements
Table 6: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal block label
Terminal
label
Function, ratings, requirements
Determine wire size and
maximum cable length
+15 V
15 VDC Power Source
for active (3-wire) input devices
connected to the Universal INn terminals.
Provides 100 mA total current.
Same as (Universal)
IN
n.
Note:
Use 3-wire cable for
devices that source power
from the +15 V terminal.
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pull-down
See Guideline
A
in Table 8
Analog Input - Resistive Mode (0–600k ohm)
Internal 12 V. 15k ohm pull up
Qualified Sensors: 0-2k ohm potentiometer, RTD (1k Nickel
[Johnson Controls
®
sensor], 1k Platinum, and A99B Silicon
Temperature Sensor), Negative Temperature Coefficient
(NTC) sensor 10k Type L (10K Johnson Controls Type II is
equivalent to Type L) or 2.252k Type 2
See Guideline
A
in Table 8.
IN
n
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V, 15k ohm pull up
See Guideline
A
in Table 8.
UNIVERSAL
(Inputs)
ICOM
n
Universal Input Common
for all Universal IN terminals
Note:
All Universal ICOM
n
terminals are isolated from
all other commons.
Same as (Universal)
IN
n
OUT
n
Binary Output - 24 VAC Triac (Internal Power)
Sources internal 24 VAC power (24~ HOT)
BINARY
(Output)
OCOM
n
Binary Output - 24 VAC Triac (Internal Power)
Connects OCOM
n
to 24~ COM when activated.
Internal Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
See Guideline
C
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
External 1k to 50k ohm load required.
See Guideline
A
in Table 8.
OUT
n
Binary Output - 24 VAC Triac
Connects OUT to OCOM when activated.
External Power Source:
•
30 VAC maximum voltage to load
•
0.5 A maximum output current
•
1.3 A at 25% duty cycle
•
40 mA minimum load current
See Guideline
C
CONFIGURABLE
(Outputs)
OCOM
n
Analog Output Signal Common:
All Configurable Outputs
defined as Analog Outputs share a common, which is isolated
from all other commons except the Binary Input common.
Binary Output Signal Common:
All Configurable Outputs
defined as Binary Outputs are isolated from all other
commons, including other Configurable Output commons.
Same as (Configurable)
OUT
n
.
VAV1717 and VAV1732 VAV Controllers Installation Guide
9