Curtis 1356 - Analog and Encoder Input Specifications

Curtis 1356/1356P CAN Expansion Module Manual, Rev. A
13
2 — INSTALLATION & WIRING: I/O Signal Specifications
Analog Inputs
e 1356 /1356P has ve 0 – 15 V analog inputs. ese inputs are scaled down
by 5.76, clamped to 3.3 V, and read by a 12-bit ADC internal to the MCU.
ANALOG INPUT SPECIFICATIONS
protected
voltage
signal name pin voltage
input impedance range
Analog Input 1 J1-20
Nominal input voltage: Voltage Input Type:
Analog Input 2 J1-9
0–15V   about21kΩ
Analog Input 3 J1-21 Input maximum Resistance Input Type:
-1 V to B+
Analog Input 4 J1-10
reverse voltage:-1.7V   about1kΩ
Analog Input 5 J1-22
e maximum resistive input on each analog input is 7.5 kΩ. e resistive or
voltage type of analog input can be selected by a Curtis programmer (1313/1314)
or CAN SDO message.
ese ve analog inputs can also be used as digital inputs. A unique fea-
ture of these digital inputs is that the active high/low thresholds are completely
programmable. us, these inputs can be used with analog sensors to detect
conditions like over/under pressure, high/low level points, etc.
Encoder Inputs
Analog Inputs 4 and 5 can be congured as a quadrature encoder input (En-
coder A and B). is standard quadrature encoder input accepts open collector
encoders with pull-up resistors in the 1356 /1356P module. e encoder can be
powered from the +5V supply (J1-12) or the +12V supply (J2-4) while using
the I/O GND (J1-24) as a common.
ENCODER INPUT SPECIFICATIONS
protected
encoder frequency input voltage
phase pin vth lo vth hi max iimpedance range
A J1-10
1 kΩ
B J1-22
1.0 V 2.2 V 15 kHz (internal pull-up -1 V to B+
to +4.4 V)
1
13
12
24
1
13
12
24