9
WIRING DIAGRAMS
TERMINAL CONNECTIONS CHART
Figure 3
TEMP SENSOR
PT100-Red
Sensor VCC Output
PT100-White
Input High Side
PT100-Blue
Input Return
RS-485 (Galvanically Isolated)
RS485 (+)
Positive Signal
RS485 (-)
Negative Signal
RS485 GND
Circuit Ground
*
PULSE INPUT
+5V
5VDC output to power
external sensor
(+)
Digital Pulse Frequency
Input, up to 3kHz
(-)
Digital Pulse Return
4-20mA (Galvanically Isolated)
(+)
4 to 20mA current loop-
current in to transmitter
(-)
4 to 20mA current loop-
current out of transmitter
*
*NOTE:
It is not recommended to connect
isolated ground connections together or to
board common.
Coil A
Low level sine wave input
Coil B
Low level sine wave input
GPI SENSOR
Ribbon cable connection to GPI custom
sensor designs
PULSE OUTPUT
(Galvanically Isolated)
(-)
Pulse Output return
current
*
(+)
Pulse Output frequency
output. This is a “current
sinking open collector”
output
***
POWER INPUT
(-)
12-36VDC Input A
**
(+)
12-36VDC Input B
**
**NOTE:
Polarity of voltage for DC is not
important. However, an earth ground isolated
power supply is required to prevent earth
ground loop currents and ground fault
conditions.
***NOTE:
This output may require an
external pull up resistor if interfacing
equipment does not include one.
