SIT/SDS Series
DIGITAL DIFFERENTIAL PRESSURE SWITCH & TRANSMITTER
Copyright
ⓒ
2003.08 ULFA TECHNOLOGY CO.,LTD http://www.ulfatech.com
3
Installation
Wiring
LOCATION
: Select your site location , Clean and
dry, no shock and vibration, proper to the ambient
temperature and humidity in use.
MOUNTING
The SIT/SDS Series Digital Pressure Transmitter is
designed for direct mounting on pipe or other
locations.
You need prepare PT 1/4"(3/8",1/2") female nut
on pipe or mounting locations.
CAUTION 1
You have to grab sensor housing by use
spanner to mounting and dismounting SIT/SDS
Do not hold SIT/SDS body and rotation for
mount and release.
CAUTION 2
Do not supply shock pressure to pressure port
POWER CONNECTION
The following procedures are to be used to install a
standard 24VDC main power source.
1. Before connection, the user must first confirm that
the power specification is DC24V or AC220V.
2. Verify that the facility's main power source is
turned off or disconnected.
3. Connect lead cable to power terminal matching
polarity as shown in FIG.2 below. Take care that
wrong wiring will damage the Instrument and
malfunction (AC220V is not concerned to polarity)
CURRENT OUT CONNECTION(4-20mA)
(SIT only)
The SIT sends a standard 2 wire 4-20mA current
out
1. Connect lead cable to current out terminal
matching polarity as shown in FIG.2 below.
2. Do not run the signal cable along with any high
voltage or power cable or put them in the same
race way. It may cause malfunction due to
induction.
FIG.1
FIG. 2
SWITCH OUT CONNECTION
SIT/SDS has two switches output. Each switch
operate individually and has A(normal open) and
B(normal close) contacts.
Caution :
Do not use heavy load drive directly over
the switch contact rating.
Switch contact rating(resist load)
Normal Switching Capacity
1A 30V DC
0.5 A 125V AC
Max Switching Power
30W , 6.25VA
Max Switching Voltage
110V DC , 125V AC
Max Switching Current
1A
