Adtech CLA 114 Instruction Manual

1.0 INTRODUCTION
These instructions refer to the above models. Supplementary
sheets are attached if the unit has special options or features.
For detailed specifications, refer to the Data Bulletin. All
ADTECH instruments are factory calibrated and supplied
with a label detailing the calibration.
normally not necessary. A simple calibration check should
be performed to verify calibration before installing the
instrument per 3.0 below.
2.0 GENERAL DESCRIPTION
The ADTECH CLA 114 is a loop powered current trip alarm
that accepts a 4-20 mA DC input signal and provides a relay
contact output.
A SPOT relay contact output is standard, with Option O 49
a DPDT output is provided.
Relay action: Hi or Low and is set by internal jumper
arrangement as per table on page 3.
Unless otherwise specified, the alarm is set as a Hi trip.
A pulsing Green LED indicator that indicates the magnitude
of the input signal (i.e.) the pulse rate increases (decreases)
with the input signal is also supplied.
A Red LED indicator for alarm condition is also provided.
3.0 INSTALLATION
The instrument is supplied in a general purpose enclosure
as standard. NEMA 4, 7 or 12, snap track and DIN are
optionally available. Installation area/location must agree
with the supplied instruments including operating temperature
and ambient conditions.
Mounting
Refer to the appropriate outline drawing for mounting and
clearance dimensions. The instrument is surface mounted
with two #6-32 screws on 3.00 inch centers.
Electrical Connections
The wire used to connect the instrument to the control
system should be a twisted pair(s) and sized
lnpuUOutput
according to normal practice. Shielded cable is not normally
necessary (if used, the shield must be grounded at the input
negative of the ADTECH instrument and left floating at the
sensor).
Six position compression terminals are provided for 1/0
connections. An added 3 position plug-in terminal block is
available for option 049-DPDT output.
Controls
Multiturn set point (SP) control is provided to set the trip point
level on all units. Adjustable deadband (DB) control is also
provided as option O46S.
The multiturn control(s) is accessible through the instrument
front panel and is clearly marked for ease of use.
CLA 114
DC Current Loop Powered Trip Alarm
Instruction Manual
4.0
These instruments are electronic except for the relay(s)
output(s) and require no maintenance except for periodic
cleaning and calibration verification. The standard relay is
rated by the manufacturer for 200,000 4 amp operations at
Adjustments are
30 vdc and 10
should be verified at user established time intervals. If the
unit appears to be mis-operating it should be checked in
place per section 6.0 or removed for a bench check per
sections 6.0 and 7.0. MOST problems are traced to field
wiring and/or associated circuits. If the problem appears to
be within the instrument, proceed to sections 6.0 and 7.0.
5.0
Standard connections are shown below and on the instrument
face plate and on the Data Bulletin or on attached
supplementary sheets.
-1-
MAINTENANCE
mechanical operations. Relay output(s)
8
CONNECTIONS
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UNORM
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ADTECH.
CLA 114
LOOPPWR
AlARM
OUTPUT
r!f-rlh
FRONT VIEW
RIGHT SIDE VIEW
(1-98)
OPTION0-49
190-A-000058-DI