Ditel Kosmos series User manual

KOS1402
LOOP POWERED
TRIP AMPLIFIER
kos1402manualB.doc 30727053 Oct.99
1.0 S PECIFICATION @20ºC
1.1 KOS1402 LOOP POWERED TRIP
Input
Type 2 wires 4 - 20mA, 50mA Max
Protection Reverse conection protected
Loop Drop 5V MAX
Output
Alarms 2x high/low alarms selected by switches (side entry)
Contact 2 x N.O. relay contacts with shared com mon
Rating Resistive load 2A @ 250V AC/125V DC
Max Power 150W (Inductive Loads)
Indication 2 x Alarm LED on module front face
Setpoint 0- 100% multi turn trip set potentiometer,(access
on module front face). (Re peatability 0.2%)
Hysteresis Fixed at 0.5%
Delay 0.5 second fixed delay
Failure mode On loss of signal:
High level: no alarm condition
Low level: Alarm condition
(ie Alarm operates as if signal has fallen to - 25% or 0mA)
Minimum Current 3.5mA
1.2 GENERAL SPECIFICATIONS
Isolation 3000VAC rms between contacts and input
1000VAC rms between contacts
Ambient 0- 50ºC; 10 - 95% RH non condensing
Conection Captive clamp screws
Cable size 4mm sq solid / 2.5mm sq stranded
Case material Grey Polyam ide
Case Flammability UL94 - V0 VDE 0304 pt3 level IIIA
Dimensions 60x60x21mm
Mounting Rail DIN EN 50022 - 35
Max Vibration 12G 10 to 55Hz at double amplitude 2mm
Shock Res 12G
Compliant with EN50081 - 1, EN50082 -1
Weight 60g
2.0 INSTALLATION
Warning - Hazardous voltages may be present on the terminals - the
equipment must be installed by suitability qualified personnel and
mounted in an enclosure providing protection to at least IP20.
Warning - If not installed and used in accordance with these instructions,
protection against hazards may be impaired.
(IMPORTANT NOTE: it ma y be preferable to set the user adjustment on
the bench prior installation. Please read Section 2 before installation).
2.1 MECHANICAL
This trip must be housed within a suitable enclosure that will provide
protection from external enviroment, ensuring tha t the stated temperature
and humidity operating ranges are maintained. As KOS1402 contains high
quality relays, the usual precautions taken when using products containing
relays apply, such as care must be taken to ensure the trip is not
subjected to stron g shock or vibration, as this may result in momentary
opening of the relay contacts. The KOS1402 must not be located near a
strong magnetic field, such as a transformer,solenoid or electric motor.
The KOS1402 case designed to snap fit onto a standard "TOP HAT" DIN
Rail. To remove from DIN rail, apply pressure at the bottom face at the
back upwards towards the rail to release the spring clip and tip away from
the top. The trip may be mounted in any orientation and stacked side by
side along the rail.
2.2 ELECTRICAL
Conections to the tr ip are made via screw terminals with wire protector
plates provided inside each terminal. To maintain CE compliance twisted
pair (screened) cables are recommended for signal connections. It is also
good practice to ensure that all 4 - 20mA loops are grounded at a single
point. Before installation ensure the 4 - 20mA loop has enough voltage
available to drive the trip. Refer to the above specification for the loop
voltage drop. The dual contacts provided by the KOS1402 are capable of
switching 250V AC 125V DC @ 2A resitive load, 150Watts inductive load.
Internal Varistors are connected across the contacts to protect against
over voltage. It is advised that a external R/C snubber network is used
when switching inductive AC loads, see fig 1. When switching DC
induc tive loads, a diode connected in parallel with the inductor must be
used to protect the contacts from the energy stored in the inductor (See fig
2).
WARRANTY
The instruments are warranted against defective materials and
workmanship for a period of three years from date of delivery.
If a product appears to have a defect or fails during the normal use
within the warranty period, please contact the distributor from which
you purchased the product.
This warranty does not apply to defects resulting from action of the
buyer such as mish andling or improper interfacing.
The liability under this warranty shall extend only to the repair of the
instrument. No responsability is assumed by the manufacturer for
any damage which may result from its use.
KOSMOS SERIES

DISEÑOS Y TECNOLOGIA, S.A.
Polígono Industrial Les Guixeres
C/ Xarol 8 C
08915 BADALONA - SPAIN
Tel : +34 - 93 339 47 58
Fax : +34 - 93 490 31 45
E- mail : [email protected]
www.ditel.es
2.2 ENTRADA
Installation overvoltage category 2 (as per BS EN61010 - 1)
- If this equipment is to be used in environments with overvoltage
category 3, transient suppresors should be installed on wiring
carrying greater than 50V AC or 75VDC.
- Any power supply to the equipment greater t han 50V AC or 75VDC
must be protected by a suitable fuse and a switch or circuit breaker
which should be near the equipment.
- The equipment contains no user serviceable parts.
3.0 ALARM SETUP
Note: Latching relays are used in this product in conjunction w ith an
advanced relay drive circuit. During commissioning, on initial power
up, or after switch settins have been modified, one trip operation
must be completed in order to synchronise the latching relay(s).
Once this cycle has been completed the unit will function correctly
during normal operation cycles. On power down the trip contacts will
rest for a - 25% (0mA) process value and take this state indefinitely
until power up. The initial power up cycle will only be requiered
again if the unit switch setting s are changed, or the unit is removed
from the installation and is subjected to shocks greater that 12G, ie
during transit. This section deals with the setting up of the trip. Two
adjustement are available to the user on each channel: -
- High /Low alarm sele ction switch located on the side of the trip, for
each trip.
- Setpoint adjustment - 15 turn potetiometer front panel provides 0 -
100% setpoint range for each trip.
Hysteresis is fixed at 0.5% Hysteresis is necessary to stop relay chatter at
the trip point.
T he alarm status is indicated on the front panel by means of a red LED,
one for each channel - "ON" indicates in alarm.
With care, the KOS1402 trip setpoints may be set up in the process but
the task is greatly simplified by replacing the process signal wit h a
adjustable 4 - 20mA current source, to simulate the 4 - 20mA process signal.
The set up process is as follows: -
a. First decide on the type of trip required for each channel, "High" for
alarm ON above setpoint, or "low" for alarm ON below setpoint. Set
the H igh/Low alarm selection switch on the side of the enclosure to
the desired setting, by inserting a 3mm blade screw driver into the
hole(s) and apply one press against the switch plunger. This will
toggle the switch between the two alarm settings being: -
Hi gh alarm state - plunger out (flush with the enclosure inside face)
Low alarm state - plunger in (depressed below side face)
b. Set the process current to the desired trip alarm setting, then using
a 3mm screw driver adjust the setpoint until the alarm change s
state. Clockwise to increase, anticlockwise to decrease. Adjust the
setpoint backwards and forwards until it is positioned at the point at
which the alarm LED has just come on. Repeat for other channel.
c. Now raise and lower the process input signal about the trip setting
and unsure the alarm trips at setpoint and trips off at setpoint plus
(minus) hysteresis. If required fine adjust settings.
Current calibrator must be capable of driving the expected 5V loop drop.
4.0 OPERATION
Once setup and operating satisfactorily the trip amplifier requires no
further user adjustments..
5.0 MECHANICAL DETAIL