Current Transformer (Motor Amps) - Johnson Controls FRICK QUANTUM HD Maintenance Manual

090.040-M (MAR 12)
Page 38

CURRENT TRANSFORMER (MOTOR AMPS)

Channel 16 of Analog Board 1 is dedicated to reading mo-
tor amps, either through the use of the on board current
transformer when using a 0-5 amp CT, or from an exter-
nal source. When reading motor amps directly at the P8
U4
D9 Act
D3 CRx
D2 CTx
D7 Rx
D8 Tx
QUANTUM™ HD COMPRESSOR CONTROL PANEL
MAINTENANCE
U10
terminal strip from a CT, the input signal cannot exceed 5
amps. If you are using an external DC Ma or voltage de-
vice, remove the jumper at Link 2, and connect the wiring
to connector P7B. If you intend on utilizing the on-board
current transformer, then install Link 2, and connect the
wiring to Channel 16, as shown in the diagram below:
LK 2 LK 2
Install this jumper when using the
LK2
Install this jumper when using the on
on board Current Transformer and
board Current Transformer with a 0-5
connector P8 to use CH. 16 (P8) to
amp CT connected to P8 to use Ch. 16
read Motor Amps
(P8) to read Motor Amps.
Remove for CH. 16 external Motor
Remove this jumper for Ch. 16 exter-
Amps signal and connect to P7B
nal Motor Amps signal and connect to
directly
P7B directly.
CH. 16 CH. 16
Current Transformer (CT) connection
CH.16
Current Transformer (CT) connection
- Standard direct connection, 0 - 5
- Standard direct connection, 0 - 5
amp input (Install LK2)
amp input (Install LK2)
CH. 16 CH. 16
CH.16
Motor Amps - Alternate external
Motor Amps - Alternate external
signal connection, 0 - 20mA input
signal connection, 0 - 20mA or
(Remove LK2)
4-20mA input (Remove LK2)