1.4 Wiring the transmitter
Proceed to the appropriate section for instructions on:
• Standard wiring connections (below)
• "Hazardous area wiring connections" on page 6
1.4.1 Standard wiring connections
The
HygroPro
is a 4-20 mA loop-powered device that can
use the same two wires for its measurement signal lines
and its power supply lines. Follow the instructions in this
section only for units
not
requiring hazardous (classified)
area protection.
IMPORTANT
To install the
HygroPro
in a hazardous (classified) area, see
"Hazardous area wiring connections" on page 6
The transmitter must be wired using the factory-supplied,
2-meter cable. If a different cable length is required, please
contact the factory for assistance.
Note:
If a longer cable is required, you may splice an
extension onto the standard cable. Be sure to connect
leads of the same color together. For example, connect blue
lead to blue lead, brown lead to brown lead, etc.
The
HygroPro
may be connected to either of the following
types of external systems:
• an external device that can provide the loop power
to the HygroPro and can also receive and display the
4-20 mA measurement output from the HygroPro
(proceed to next page)
• an external power supply to provide power to the
HygroPro
plus a personal computer (PC) running
Panametrics’
PanaView™
interface software
(proceed to page 13)
1.4.1a Standard connections - without a PC
IMPORTANT
To install the
HygroPro
in a hazardous (classified) area,
see "Hazardous area wiring connections" on page 6.
Refer to "Figure 3" on page 5 and
Table 1
below, and
complete the following steps to wire the transmitter.
Table 1: Cable leads - without a PC
Lead
Connection description
Blue
Power
supply
(+)
[12-28
VDC]
Brown
Power
supply
(–)
[return]
Shield
Earth
ground
[recommended]
1. Push the female connector end of the factory-supplied
cable into the mating male connector on the transmitter
module. Make sure the pins are properly aligned. Then,
secure the connectors together by sliding the metal
sleeve on the cable over the connectors and turning
it clockwise until it is tight.
2. Using the flying leads at the other end of the factory-
supplied cable, connect the transmitter to the external
system.
Note:
The blue and brown leads also carry the measurement
signal current output of 4-20 mA.
3. Trim any unused leads even with the outer cable
jacket to remove any bare wire and prevent accidental
short circuits.
4
