Soclair Electronic COM 90 Series COM 90-1 User manual

SOCLAIR ELECTRONIC 21.12.2002
www.soclair.ch
1
Configurable Double Limit Switch COM 90
Double Limit Switch
General Description
This module contains two comparators and one or two relays for
the monitoring of analog signals from 0-400 mV, 0-10 V or 0-20
mA. Input range and operating mode may be selected via DiL-
switches. Two switching thresholds with status LED’s, adjustment
via a 12-turn potentiometer
•Choice of one or two relays with double-throw contacts
•Selectable operating modes: limit switch, window comparator,
two-position controller
•Adjustable hysteresis (standard) und time delay (Option).
•Secure against short-circuits and terminal reversal, up to 40
VDC over-voltage at all inputs; fulfils all EMC-EC norms for
industrial environments (EN500082/IEC801).
Overview
For DIN-Rails Type Input Supply Konfig. Features
COM 90-1V, 0/4-20mA 21-30V progr. With one relay
COM 90-2V, 0/4-20mA 21-30V progr. With two relays
General
These DIN-rail modules possess two front-plate potentiometers for the two thresholds and three status LEDs, input
values below “low” threshold, between “low” and “high” (window) and above “high”. The optional relay has tree
2.8mm flat connectors on the top of the module, for which corresponding screw terminal connectors are available
(type lmi 205 203 01).
Upon request, relay 2 can also be connected between screw terminals 5 and 6 (instead of the flat connectors). In
that case only two single contacts are available for each relay.

SOCLAIR ELECTRONIC 21.12.2002
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Technical Data
Specifications (Max. values at 23°C, unless otherwise stated)
Imput Impedance Unit
0-20 mA, typ./max.190/105 Ohm
0-400 mV, typ. 100 MOhm
0-10 V 250 kOhm
Switching Threshold Unit
Adjustability via 12-turn potentiometer 0.02 %
Temperature drift, max. 200 ppm/K
Switching limit adjustment range 1-105 %
Hysteresis adjustment range, typ. 0.1-2.5 %
Dynamic Response Unit
Response time, max. 50 ms
Adjustment range of time delay3, typ. (option) 0.04-1s
Relays Unit
max. Switch voltage2250/220 VAC/DC
max. contact current/switch current 2A
max. switching capacity 24/60 W/VA
Test voltage with intermittently open contacts 1000 VAC
Contact-coil test voltage 1500 VAC
Supply Unit
Max. Current requirement 80 mA
min./max. supply voltage 20/30 VDC
1
Input impedance increases form 60°C (current limit with PTC at ca. 150 mA)
2
Gold plated relay contacts also for uV/uA-loads
3
Option: Other delay times up to max. 5 sec. Available on request. Asymmetrical operation also available on
request.
Temperature range °C: recommended: 0/60 °C functional: -20/90 °C
Warning:
The specification quoted is only for ohmic loads. Overvoltages occur when switching inductive loads (e.g. coils,
transformers, motors) which can lead to EMC problems and, in certain cases, to the destruction of the relay
contact. Appropriate measures (e.g. RC-circuits or varistors) must be taken to suppress these overvoltage spikes at
the load.
Connection, Dimensions and Potentiometers

SOCLAIR ELECTRONIC 21.12.2002
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Input
Current: DC-currents up to 20 mA, input impedance
ca. 100 Ohm. Overvoltage protection up to 30 V (self
resetting PTC-fuse). Surge/burst protection up to 3
kV.
Voltage: Range 1: 0-400 mV, input impedance ca.
100 MOhm; range 2: 0-10 V, input impedance 250
kOhm. Upon request up to 60 VDC, also negative
voltages. Overvoltage protection up to 30 V (self
resetting PTC-fuse). Surge/burst protection up to 3
kV.
Relays:
Relays with gold plated , switching uV/uA as well as
2A/250VAC. Test voltage: 1000 V
Operating Modes
•One or two independent limiting values
(thresholds, relays 1 and 2)
•Window comparator (only relay 1)
•Two-position controller (only relay 1)
The operating mode is selected by DIL-switches.
Supply
All modules are suited for unregulated, noisy
industrial power supplies; nominal value is 24 VDC
(min. 20V, max. 30V). Other supply voltages on
request. Option: isolated power supply.
Operating modes/Settings
•Input: 0-400 mV, 0-10 V, 0-20 mA: DIL-Switch
•Relay inversion switching status: DIL-Switch
•Hysteresis (0.1-2 %): trimming potentiometer
•Time delay (0.05 -1 sec., only for relay 1):
trimming potentiometer (option)
Options
•DC-DC-converter for power supply (0.7 or 3 kV
test voltage)
•Second relay (only for „high“ limiting value)
•Time delays (only for relay 1). Adustable input
filter.
•Open input detection, current interruption (4-20
mA) detection. Such a condition will switch the
relays off (safe status, independent of operating
condition).

SOCLAIR ELECTRONIC 21.12.2002
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Operating Instructions
Connection
1: Power supply + (24 V DC)
2: Power supply -(24 V DC) / Ground
3: Analog Input -(Ground)
4: Analog Input + (current 0/4-20mA or voltage 0-10V or 0-400 mV)
5:
6: Relay 1 The optional relay2 has tree 2.8mm flat connectors on the top of the module (KTE-version two
7: Relay 1 screw terminals).
8: Relay 1
Adjustment of Switching Limits, Status-LEDs
The two thresholds “low” and “high” are adjusted via two front-plate potentiometers. Three status LEDs show the
position of the input: input values below “low” threshold, between “low” and “high” (window) and above “high”.
DIL-Switches
Operating Mode Switch
Limit switch 2 off 3 off
Window comparator 2 on 3 off
Two-position controller 2 off 3 on
Inversion Relay 1 5 on
Inversion Relay 2 4 on
Input Switch
0-400 mV 1 off 6 off
0-10 V 1 on 6 off
0-20 mA 1 off 6 on
Note: Switch 2 and 3 may not both be simultaneously „on“.
Operating Modes
1. Limit switch: Relay 1 is controlled by the lower threshold („low“, relay 2 (if it exists) is controlled by the
upper threshold („high“). Both relays operate independently.
2. Two position controller: The switching points are calibrated via the two thresholds „low“ and „high“
(hysteresis). Applications: e.g. for level control („low“ on, „high“: off).
3. Window comparator
Factory Configuration:
Hysteresis: ca. 0.5 %
Delay: Minimum
Operating mode: Window comparator
Input: Voltage 0-10 V

SOCLAIR ELECTRONIC 21.12.2002
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5
10k 20
V1 6 I
Low comp.
Hyst. L
Hyst. H
High comp.
Option
DC
DC
240k 70
2-pos. contrl.
Window comp.
Delay (option)
Inversion
-1
-1
High threshold
Low threshold
Signal- (GND)
Signal+ (V / I)
Us- (0V)
Us+ (24V)
1
2
4
3
3
2
5
4
9 10 11
Relay 2
(option)
5
6
7
8
Block Diagram COM90-1 and –2.
Illustrated relay status: no current (released),
Relay status in operation (no inversion, i.e. switches 4 and 5 “off”)
Relay 1 pulled-in, input < low or outside of window
Relay 2 pulled-in, input < high
Version KTE: Relay 1 connected with terminals 7 and 8, relay 2 with terminals 5 and 6 (one contact each)
Important note:
Soclair Electronics is continually working to improve the quality and reliability of its products. MTBF (using MIL217)
is well above 10 years (in most cases even more than 100 years). Nevertheless, electronic devices in general can
malfunction or fail due to their inherent physical and chemical properties. It is the responsibility of the buyer, when
utilizing Soclair Electronic products, to observe standards of safety and to avoid a situation in which a malfunction
or failure of a Soclair Electronic device could cause loss of human life, injuries or damage to properties. Soclair
Electronic products are not authorized for use in life support systems.