2 — INSTALLATION AND WIRING
pg. 15
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
Digital and PWM Outputs
Seven digital (on/o ) and PWM output drivers are available. One of these, the proportional driver,
can be operated in a current control mode for driving a proportional valve or similar load. e
frequency of this driver is normally 18 kHz, but this output can also serve to drive an electronic
speedometer or tachometer using the VCL function Automate_Frequency_Output(); see page 125.
Each output can be independently turned on continuously (low level) or pulse width modulated to
set the average output voltage. ese outputs are intended to drive inductive loads such as contactors
and electromagnetic brakes but could also be used to drive resistive loads if peak current ratings are
not exceeded. All these outputs are protected against shorts to B+ or B−. All inductive loads should
be connected to the coil return (pin 13), which provides yback diode protection.
ese lines can also be used as digital inputs, and are included in that group as well.
DIGITAL and PWM OUTPUT SPECIFICATIONS
Name Pin PWM PV Current Frequency
Output
Current
Protected
Voltage
ESD
Tolerance
Driver 1 6
0 to 100%
Duty Cycle
N/A
120 to 1000
Hz *
2A Max
–0.5 V to
(MaxV + 10 V)
± 8 kV
(direct
strike)
Driver 2 5 3A Max
Driver 3 4
2A Max
Driver 4 3
Prop Driver 2
0 to 2A in
607 nominal
steps
18 kHz
Digital Out 6 19
On / Off N/A N/A 1A Max
Digital Out 7 20
*Drivers 1–4 Fequency is set by the PWM Frequency parameter.
Analog Inputs
Two control lines can be used as analog inputs. Both inputs are protected against shorts to B+ or B−.
Typically Analog 2 is used as the input for the motor temperature sensor. is input provides a
constant current appropriate for a thermistor sensor. Some standard predened motor temperature
sensors are supported in soware (see the motor's Sensor Type parameter). Note: e industry
standard KTY temperature sensors are silicon temperature sensors with a polarity band; the polarity
band of a KTY sensor must be the end connected to I/O Ground (pin 7).
ese lines can also be used as digital inputs, and are included in that group as well (see page 13).
ANALOG INPUT SPECIFICATIONS
Signal Name Pin
Operating
Voltage
Input
impedance*
Protected Voltage ESD Tolerance
Analog 1 24
0 to 10V
in 1024
steps
24-36 V models:
6.9 kΩ, 7.1 kΩ
36-48 V models:
10.5 kΩ, 11.0 kΩ
48-80 V models:
23.8 kΩ, 28.1 kΩ
72-96 V models:
n/a, 28.1 kΩ
–10 V to
(MaxV + 10 V)
± 8 kV
(direct strike)
Analog 2 8
* The rst value is for 1232E/SE and 1234E/SE controllers, and the second value is for 1236E/SE and 1238E/SE controllers.
13
24
1
23
35
12
13
24
1
23
35
12
Quick Links:
Figure 3 wiring diagram p.12
Motor Temp Sensor p.61
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