6
Hardware Setup
3.2
10-PIN Connector Wiring Diagrams
The 10-pin universal input connector pin assignments are summarized in
Table 4
.
Table 4. 10-Pin Input Connector Wiring
Pin
No.
Code
Description
1
ARTN
Analog return signal (analog ground) for sensors and remote Setpoint
2
AIN+
Analog positive input
3
AIN-
Analog negative input
4
APWR Analog power reference
5
AUX
Auxiliary analog input for remote Setpoint
6
EXCT
Excitation voltage output referenced to ISO GND
7
DIN
Digital input signal (latch reset, etc.), Positive at > 2.5V, ref. to ISO GND
8
ISO
GND
Isolated ground for serial communications, excitation, and digital input
9
RX/A
Serial communications receive
10
TX/B
Serial communications transmit
Table 5
summarizes the universal input pin assignments for different sensor inputs. All sensor selections
are firmware-controlled and no jumper settings are required when switching from one type of sensor to
another.
Table 5
.
Sensor Pin Assignments
Pin
Diff
Voltage
Process
Voltage
Process
Current
2-Wire
RTD
3-Wire
RTD
4-Wire
RTD
Thermistor
Remote
(1)
Setpoint
1
Vref -
(2)
Rtn
(3)
RTD2-
RTD2+
Rtn
2
Vin +
Vin +/-
I+
RTD1+
RTD1+
RTD1+
TH+
3
Vin -
I-
RTD2-
TH-
4
Vref +
(2)
RTD1-
RTD1-
RTD1-
5
V/I In
(1)
Remote Setpoint cannot be used with RTD inputs.
(2)
Reference voltage required for Ratio-metric mode only.
(3)
2 Wire RTD Requires external connection of Pin 1 and Pin 4.
Figure 3
shows the wiring diagram for connecting RTD sensors. For 2 wire RTD sensors use a jumper
wire, included in the provided wire kit, to connect pins 1 and 4.
Figure 3. RTD Wiring Diagram
1
2
3
4
5
6
7
8
9
10
