Curtis 1238SE - Switch Input Wiring; Low Power Circuit Specifications

2 — INSTALLATION AND WIRING
pg. 13
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
in the event of various other faults. If the main contactor coil is not wired to Pin 6 of the 35-pin
connector as shown, the controller will not be able to open the main contactor in serious fault
conditions and the system will therefore not meet EEC safety requirements.
Note that the basic wiring diagram is designed for generic applications and may not fully meet the
requirements of your system. ese controllers have very exible I/O and wiring congurations;
you may wish to contact your Curtis distributor or support engineer to discuss your particular
application.
SWITCH INPUT WIRING
e following inputs are dedicated to specic functions when the parameter settings are as shown:
Switch 1: Emergency Reverse input if the EMR Enable = On and EMR Type = 0 or 2
(see page 65).
Switch 3: Interlock input if Interlock Type = 0 (see page 52).
Switch 5: Lift input (depends on VCL program).
Switch 6: Lower input (depends on VCL program).
Switch 7: Forward input if Throttle Type = 1–3 (see page 46).
Switch 8: Reverse input if Throttle Type = 1–3 (see page 46).
LOW POWER CIRCUIT SPECIFICATIONS
e input/output circuits wired to the 35-pin connector can be grouped by type as follows; their
electrical characteristics are discussed below.
• Digital Inputs
• Digital and PWM Outputs
• Analog Inputs
• Analog Output
• Power Supply Outputs
• KSI and Coil Return Inputs
• rottle and Brake Inputs
• Communications Ports I/O
• Position Feedback Inputs
Digital Inputs
ese control lines can be used as digital (on/o ) inputs. Normal “on” connection is direct to B+;
“o” is direct to B−. Input will pull low (o ) if no connection is made. All digital inputs are protected
against shorts to B+ or B−.
Nine of these lines (Switches 1–8, 16) are designed to pull current to keep switch contacts clean and
prevent leakage paths from causing false signals.
e remaining lines are digital inputs associated with driver outputs; note that they have much higher
input impedances. e two digital output lines, Digital Out 6 and 7, can also be read as inputs, and
are therefore included in this group.
e digital inputs at pins 24 and 8 can also be used as analog inputs, and are included in that group as well.