JOHNSON CONTROLS
13
SECTION 1 - FIELD CONTROL MODIFICATIONS
FORM 161.01-PW2
ISSUE DATE: 7/18/2018
1
For example, if the input is 5VDC, the setpoint would
be set to 65% as follows:
SETPOINT (%) = 100 – (5 X 7) = 100 – 35 = 65%
FIGURE 14 - REMOTE MOTOR CURRENT LIMIT
SETPOINT WITH 0-10VDC
LD04498
+
_
Signal
Common
J22
1
5
4-20mA - The reset signal is a 4-20mA hard-wired sig-
nal from the BAS. The Microboard jumper JP23 must
be installed on pins 1 to 2 for this setting. As shown in
Figure 15 on page 13, connect input to Microboard
J22-2 (signal) and J2-5 (GND). The setpoint varies lin-
early from 100% to 30% FLA as the input varies from
4-20mA. This input will only be accepted when the
Control Source is set to 4-20mA.
Calculate the setpoint for various inputs as follows:
SETPOINT (%) = 100 – [(MA – 4) X 4.375]
For example, if the input is 8mA, the setpoint would be
set to 83% as follows:
SETPOINT (%) = 100 – [(8 – 4) X 4.375]
= 100 – (4 X 4.375)
= 100 – 17.5
= 82.5
= 83%
FIGURE 15 - REMOTE MOTOR CURRENT LIMIT
SETPOINT WITH 4-20MA SIGNAL
+
Signal
Common
J22
2
5
PWM - The Pulse Width Modulation input is in the
form of a 1 to 11 second relay contact closure that ap-
plies 115VAC to the I/O Board TB3-20 for 1 to 11 sec-
onds. As shown in Figure 16 on page 13, connect
dry closure relay contacts between I/O Board TB3-20
(signal) and TB3-1 (115VAC).
The setpoint varies linearly from 100% to 30% as the
relay contact closure time changes from 1 to 11 seconds.
The relay contacts should close once every 30 minutes
for 1 to 11 seconds at least, to maintain setpoint to the
desired value. If 1 to 11 second closure is not received
within 30 minutes of the last closure, the setpoint is de-
faulted to 100%. A closure is only accepted at rates not
to exceed once every 70 seconds. This input will only
be accepted when the Control Source is set to PWM.
Calculate the setpoint for various pulse widths as fol-
lows:
SETPOINT (%) = 100 – [(PULSE WIDTH IN SECONDS – 1) X 7]
For example, if the relay contacts close for 3 seconds,
the setpoint would be set to 86% as follows:
SETPOINT (%) = 100 – [(3 – 1) X 7]
= 100 – (2 X 7)
= 100 – 14
= 86%
FIGURE 16 - REMOTE MOTOR CURRENT LIMIT
SETPOINT WITH PWM SIGNAL
LD23516
To Energy Management
System (Relay Closure)
1 to 11 Second Pulse Width
Modulated (PWM) Signal
with Contacts Rated
5mA @ 115VAC
I/O
Board
TB3
120
Field Wiring Term.
Block in OptiView
Control Center
To Next Page
Loading...
