Keyswitch And Coil Supply; Can Ports; Table 13 Keyswitch And Coil Supply Electrical Specifications - Kohler Curtis F Series Manual

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Keyswitch and Coil Supply

Connect the Keyswitch (KSI) input to B+ via a keyswitch. The keyswitch input feeds the controller's
internal power supplies, the Coil Supply output, and the main-capacitor bank's precharge (before the
main contactor closes). The lead-acid Battery Discharge Indicator (BDI) uses the keyswitch voltage.
Always connect the Coil Supply circuits (i.e., the contactors' B+ source) directly to the positive
side (+) of the contactors' coil terminals so that the electrical-switching-noise associated with low-
side drivers' pulse width modulation (PWM) operation is localized to the contactor wiring only.
The controller includes an internal fly-back diode between each Driver and Coil Supply to suppress
the coils' inductive voltage spike. Coils with their own inductive-spike suppression diodes are allowed,
yet resistive means are discouraged because of leakage currents. Note, the cumulative sum of the
Driver 1 through Driver 7 currents shall not exceed the Coil Supply's maximum continuous current
rating (see Table 13, below).
It is important to maintain the division between KSI and Coil Supply in order to ensure reverse
polarity protection (vehicle wiring correct, battery terminals reversed). Reference the wiring diagrams
for the KSI and Coil Supply connections.

Table 13 Keyswitch and Coil Supply Electrical Specifications

AMPSEAL Connector Current Ratings
KSI Inrush Current
Precharge Current
Includes current from the Coil Supply (full driver usage). Gold plated terminal basis, default models, peak/momentary.
1
Tin plated terminals will have reduced current rating, i.e., 8 Amps. (On special models, so equipped with Tin pins).

CAN Ports

One or two CAN ports are available. Each CAN port can have a unique Node ID, which may be the
same for both ports (if not connected to the same CANbus) and they can operate at different baud
rates. On the 35-pin controllers, both isolated CAN and non-isolated CAN port models are available
(see Appendix E).
On the non-isolated 2-port CAN models, both ports share the controller internal power
Quick Links:
Fig 13 p.17
supply and I/O ground (B–) reference. On these models, enable the CAN1 port's internal 120Ω
Fig 14 p.18
termination by externally connecting pins 21 and 34 together. The CAN2 port does not have
Fig 15 p.19
internal 120Ω termination.
Appendix D p.252
Appendix E p.262
The models with 35-pins have an isolated CAN option. On these models, the CAN ports (CAN1 H/L
and CAN2 H/L) are isolated from B+ and B–, but not from each other. The isolated CAN models
provide an isolated CAN ground (pin 34 in Figures 13 and 15). These models do not have internal
120Ω termination. They also do not use pin 21.
2 — INSTALLATION AND WIRING
Signal 23-Pin
Keyswitch (KSI) 1
Coil Supply 2
VCL Functions
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022
35-Pin Operating Voltage
1
Between the under- and
overvoltage cutback limits
13
12 Amps per pin (Maximum, continuous)
10 Amps, Max, ≤ 2 milliseconds overall, with initial peak ≤ 20 µs, 25°C
2 Amps for < 1 sec (typical)
Keyswitch_Voltage
Coil_Supply
Input Current
< 12 Amps
12 Amps 24V Models
1
10 Amps 36-48V Models
1
VCL Monitor Variables
1
pg. 27