Curtis 1239E - Analog Inputs; Analog Output; Power Supply Outputs

Return to TOC Curtis 1239E-1269E Manual, os 37.0 RevA – May 2021
2 — INSTALLATION AND WIRING
pg. 17
Analog Inputs
Two control lines can be used as analog inputs. Both inputs are protected against shorts to KSI or
low power ground.
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 predened motor temperature
sensors are supported in soware (see Motor 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 low power ground (pin 7).
ese lines can also be used as digital inputs, and are included in that group as well.
ANALOG INPUT SPECIFICATIONS
Name Pin
Operating
Voltage
Input Impedance
to Ground
Protected Voltage ESD Tolerance
Analog 1 24
0 to 10V
in 1024
steps
7.0 kΩ
–10V to 20V
± 8 kV (direct
strike)
Analog 2 8
Analog Output
A single line is available as a low power analog output and is intended to drive loads connected only
to the low power ground, such as instrumentation. is output is generated from a ltered PWM
signal and has about 1% ripple. e 2% settling time is < 25 ms for a 0–5 V step and < 30 ms for a
0–10 V step. is output line is protected against shorts to KSI or low power ground.
ANALOG OUTPUT SPECIFICATIONS
Name Pin
Output
Voltage
Output Current Protected Voltage ESD Tolerance
Analog Out 30 0 to 10V 10 mA max
–1V to 20V
± 8 kV (direct
strike)
Power Supply Outputs
Two lines provide auxiliary output power for low power circuits such as electronic throttles, LED
indicators, displays, position encoder, and remote I/O boards. Both power supply outputs are
protected against shorts to KSI or low power ground.
POWER SUPPLY OUTPUT SPECIFICATIONS
Name Pin
Output
Voltage
Output Current Protected Voltage ESD Tolerance
+12V Out 25
11.5 to
12.5V
100 mA max for +12 Out
100 mA max for +5 Out
200 mA max (combined total)
–1V to 20V
± 8 kV (direct
strike)
+5V Out 26 5V ± 10%
13
24
1
23
35
12
13
24
1
23
35
12
13
24
1
23
35
12
Quick Links:
Figures 5 & 6 wiring
diagram p.12-13
Motor Temp Sensor p.68