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SECTION 22 - REMOTE SETPOINTS
0 to 10 VDC
As shown in Figure 30 on page 94, connect input to
Microboard J22-3 (signal) and J22-5 (GND). A 0 VDC
signal produces a 0°F offset. A 10 VDC signal produces
the maximum offset above the Local setpoint value (as al-
lowed by the Remote Reset Temperature Range setpoint).
The setpoint is changed linearly between these extremes
as the input varies linearly over the range of 0 VDC to 10
VDC. This input will only be accepted when Analog Re-
mote Mode is selected, the Remote Analog Input Range
setpoint is set for 0 to 10 VDC and Microboard Program
Jumper JP24 has been removed. Calculate the setpoint for
various inputs as follows:
Offset (°F) = ( VDC)(Remote Reset Temp Range)
Setpoint (°F) = Local Setpoint + Offset
For example, if the input is 5 VDC and the Remote
Reset Temperature Range setpoint is programmed
for 10°F and the Local Leaving Chilled Liquid Tem-
perature setpoint is programmed for 40°F, the setpoint
would be set to 45°F as follows:
Offset (°F)
= 5 x 10
= 50
= 5°F
Setpoint
= 40 + 5
= 45°F
2 to 10 VDC
As shown in Figure 30 on page 94, connect input
to Microboard J22-3 (signal) and J2-5 (GND). A 2
VDC signal produces a 0°F offset. A 10 VDC signal
produces the maximum allowed offset above the Local
Setpoint value (as allowed by the Remote Reset Tem-
perature Range setpoint). The setpoint is changed lin-
early between these extremes as the input varies over
the range of 2 VDC to 10 VDC. This input will only be
accepted when Analog Remote Mode is selected, the
Remote Analog Input Range setpoint is set for 2 to 10
VDC and the microboard Program Jumper JP24 has
been removed. Calculate the setpoint for various inputs
as follows:
Offset (°F) = ( VDC – 2)(Remote Reset Temp Range)
Setpoint (°F) = Local Setpoint + Offset
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JCI COMPANY CONFIDENTIAL
For example, if the input is 5 VDC and the Remote
Reset Temperature Range setpoint is programmed
for 10°F and the Local Leaving Chilled Liquid Tem-
perature setpoint is programmed for 40°F, the setpoint
would be set to 43.8°F.
Offset (°F)
= (5 – 2)(10)
= (3)(10)
= 30
= 3.8°F
Setpoint (°F)
= 40 + 3.8
= 43.8°F
0 to 20mA
As shown in Figure 30 on page 94, connect input to
Microboard J22-4 (signal) and J22-5 (GND). A 0mA
signal produces a 0°F offset. A 20mA signal produces
the maximum allowed offset above the Local setpoint
value (as allowed by the Remote Reset Temperature
Range setpoint). The setpoint is changed linearly be-
tween these extremes as the input varies over the range
of 0 to 20mA. This input will only be accepted when
Analog Remote Mode is selected, the Remote Ana-
log Input Range setpoint is set for 0 to 10 VDC and
Microboard Program Jumper J24 has been placed on
pins 1 and 2. Calculate the setpoint for various inputs
as follows:
Offset (°F) = (mA)(Remote Reset Temp Range)
Setpoint (°F) = Local Setpoint + Offset
For example, if the input is 8mA, the Remote Reset
Temperature Range setpoint is programmed for 10°F
and the Local Leaving Chilled Liquid Temperature
setpoint is programmed for 40°F, the setpoint would be
set to 44°F as follows:
Offset (°F)
= (8)(10)
= 80
= 4°F
Setpoint (°F)
= 40 + 4
= 44°F
FORM 160.54-M1
ISSUE DATE: 10/25/2019
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JOHNSON CONTROLS
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