Hach pHD Sensor User Manual page 7

Connect the sensor to the gateway
Electrocution Hazard. High voltage wiring for the controller is conducted behind the high voltage barrier in the
controller enclosure. The barrier must remain in place except when installing modules, or when a qualified
installation technician is wiring for power, relays or analog and network cards.
Potential Electrocution Hazard. Always disconnect power to the instrument when making electrical
connections.
Potential Instrument Damage. Delicate internal electronic components can be damaged by static
electricity, resulting in degraded performance or eventual failure.
Pre-requisites: Make sure the sensor cable is routed through the sealing hub and then the lock ring
for the pH flow cell before doing this procedure. Refer to
illustrated steps.
To connect the sensor to the gateway, refer to the illustrated steps and
Connector
J4
GRN (TB1)
RED (TB2)
D A N G E R
W A R N I N G
N O T I C E
Table 1 pHD sensor wire connections
Pin
WHT
SHLD Solution ground
BLK
YEL
1
2
1 Active/Measuring
2 Active/Measuring
Install the sensor
Table
Signal
-5 VDC
Temp –
Temp +
Reference
Reference
on page 5 for the
1.
Sensor wire
White
Clear (2 wires)
Black
Yellow
Green
—
—
Red
English 7