Low Voltage Power Supply Input (Optional); Pressure Transducer Connection (Optional); Figure 16 Low Voltage Power Supply Connections; Figure 17 Electrical Connection Detail - Michell Instruments Pura User Manual

Pura Advanced Online Hygrometer User Manual

2.10.2 Low Voltage Power Supply Input (Optional)

For low voltage powered display
• 18...36 V AC and 9...60 V DC
Connect the power supply to the monitor (1) as shown in Figure 16.
2.11

Pressure Transducer Connection (Optional)

The monitor provides excitation voltage (24 V DC @ 20 mA) for an auxiliary 2-wire
transmitter used in the dual channel configuration. Connect (+) of the pressure
transmitter to pin 6 of the monitor and (-) of the pressure transmitter to pin 5 of the
monitor. Refer to Figure 17 for details.
Michell Instruments
Low Voltage Power Supply Connections
Figure 16
RELAY RELAY
SP1 SP3
N N N N
C
O
O C O O
M
30 29 28 27 26 25 24 23
1 2 3 4
PRESSURE SENSOR
Red
Blue
3 1 2
DEW-POINT
SENSOR
Electrical Connection Detail
Figure 17
V
L
Wiring Connection:
RELAY RELAY
SP2 SP4
N N
C
O
C O
M
SERIAL
INTERFACE
5 6 8 9 10 11
CONTROL INPUTS
Green
Yellow
- +
PRESSURE
SENSOR
INSTALLATION
L V
L Brown wire
V Blue wire
ANALOG
OUTPUT
- +
17 16
14 15
L N E
POWER
15