Electronic timer CT-ERD
ON-delayed with 1 c/o contact
Data sheet
Characteristics
Supply voltage: 24-240 V AC and 24-48 V DC
Single-function ON-delay timer
One device includes 7 time ranges, from 0.05 s to 100 h
6 1 c/o contact
2CDC 251 002 F0003
5 2 LEDs for status indication
1 Narrow width of only 17.5 mm
2
3
4
Approvals
a cULus
e GOST
CT-ERD f CCC
1 7 selectable time ranges,
from 0.05 s to 100 h, for the
adjustment of the time delay Marks
2 Potentiometer with direct g CE
reading scale for the fine c C-Tick
adjustment of the time delay
3 U: green LED -
Supply voltage (LED flashes Order data
during timing) Type Supply voltage Order code
4 R: red LED - CT-ERD 24-240 V AC, 24-48 V DC 1SVR 500 100 R0000
Output relay energized
5 Circuit diagram
6 Function diagram Application
With their structural form and their width of 17.5 mm only, the CT-D range timers are ideally suited for
installation in distribution cabinets.
Operating mode
The CT-ERD with 1 c/o contact offers 7 time ranges, from 0.05 s to 100 h. The time delay range is rotary
switch selectable on the front of the unit. The fine adjustment of the time delay is made via an internal
potentiometer, with a direct reading scale, on the front of the unit.
Function diagram
A ON-delay Delay on make)
Timing begins when supply voltage is applied to terminals A1-A2. The green LED flashes during timing.
When the selected time delay is complete, the output relay energizes and the flashing green LED turns
steady.
If supply voltage is interrupted, the output relay de-energizes and the time delay is reset.
Interrupting supply voltage before the time delay is complete, resets the time delay. the output relay
does not energize.
A1-A2
2CDC 252 168 F0205
15-18
15-16
green LED
red LED
t <t
t = adjusted delay time
1
Electronic timer CT-ERD
ON-delayed with 1 c/o contact
Data sheet
Connection diagram
A CT-ERD
2CDC 252 177 F0005
A1 15
A1 15
A2 16 18
18 16 A2
Version: 1SVR 500 100 R0000
A1-A2 Supply: 24-240 V AC or 24-48 V DC
15-16/18 c/o contact
2
Electronic timer CT-ERD
ON-delayed with 1 c/o contact
Data sheet
Technical Data
Input circuits
Supply voltage A1-A2 24-240 V AC / 24-48 V DC
Power consumption 24-240 V AC / 24-48 V DC approx. 0.6-1.3 VA/W
Supply voltage tolerance -15...+10 %
Supply voltage frequency DC supply 0 Hz
AC supply 50/60 Hz
Duty time 100 %
Timing circuit
Time ranges 0.05 s - 100 h 1) 0.05-1 s
2) 0.5-10 s
3) 5-100 s
4) 0.5-10 min
5) 5-100 min
6) 0.5-10 h
7) 5-100 h
Recovery time < 50 ms
Repeat accuracy (constant parameters) < +/- 0.5 %
Timing error within the supply voltage tolerance range < 0.5 %
Timing error within operating temperature range < 0.06 % / °C
Indication of operational states
Supply voltage / timer green LED steady / flashing while timing
Output relay energized red LED
Output circuits 15-16/18
Number of contacts relay, 1 c/o contact
Contact material AgSnO2
Related voltage acc. to VDE 0110, IEC 60947-1 250 V
Minimum switching voltage 12 V
Maximum switching voltage 250 V AC
Minimum switching current 100 mA
Maximum switching current 6A
Rated switching current acc. to IEC 60947-5-1 AC-12 (resistive) 230 V 6A
AC-15 (inductive) 230 V 3A
DC-12 (resistive) 24 V 6A
DC-15 (inductive) 24 V 2A
Maximum lifetime mechanical 30 x 106 switching cycles
electrical (AC-12, 230 V, 4 A) 0.1 x 106 switching cycles
Short circuit proof, max. fuse rating n/c 6 A fast, operating class gL
n/o 10 A fast, operating class gL
General data
Enclosure width 17.5 mm
length 70.0 mm
depth 63.0 mm
Wire size fine-strand with wire end ferrule 2 x 1.5 mm2
fine-strand without wire end ferrule 2 x 2.5 mm2
rigid
Weight approx. 60 g (2.1 oz)
Mounting position any
Degree of protection enclosure / terminals IP50 / IP20
Temperature operating -20...+60 °C
storage -40...+85 °C
Mounting DIN rail (EN 50022), snap-on mounting
Standards
Product standard IEC 61812-1 10.1996, EN 61812-1 +
A11/8.1999, DIN VDE 0435 Teil 2021
EMC Directive 89/336/EEC
Electromagnetic compatibility IEC 61000-6-2, EN 61000-6-4
ESD acc. to IEC 61000-4-2, EN 61000-4-2 level 3 6 kV / 8 kV
HF radiation resistance acc. to IEC 61000-4-3, EN 61000-4-3 level 3 10 V/m
Burst acc. to IEC 61000-4-4, EN 61000-4-4 level 3 2 kV / 5 kHz
Surge acc. to IEC 1000-4-5, EN 61000-4-5 level 4 2 kV L-L
3
Electronic timer CT-ERD
ON-delayed with 1 c/o contact
Data sheet
HF line emission acc. to IEC 1000-4-6, EN 61000-4-6 level 2 10 V
Low Voltage Directive 73/23/EEC
Operational reliability acc. to IEC 68-2-6 4g
Mechanical resistance acc. to IEC 68-2-6 6g
Approvals / Marks
Approvals cULus, GOST and CCC
Marks CE and C-Tick
Isolation data
Rated insulation voltage between supply circuit, acc. to VDE 0110, IEC 60947-1 300 V
control circuit and output circuit
Rated impulse withstand voltage between all isolated circuits acc. to VDE 0110, IEC 664 4 kV / 1.2-50 µs
Test voltage between all isolated circuits 2.5 kV, 50 Hz, 1 min.
Pollution category acc. to VDE 0110, IEC 664, IEC 255-5 2
Overvoltage category acc. to VDE 0110, IEC 664, IEC 255-5 III
Environmental testing acc. to IEC 68-2-30 24 h cycle time, 55 °C, 93 % rel., 96 h
Load limit curves
AC load (resistive)
V
2CDC 252 195 F0205
300
V 200
100
80
60
50
40
30
20
10
0.1 0.2 0.5 1 2 4 6 10
I A
DC load (resistive)
V
2CDC 252 196 F0205
300
V 200
100
80
60
50
40
30
20
10
0.1 0.2 0.5 1 2 4 6 10
I A
Derating factor F for inductive AC load
1.0
2CDC 252 192 F0205
0.9
0.8
F
0.7
0.6
0.5
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
cos ϕ
Contact lifetime /switching cycles N
107
2CDC 252 197 F0205
N
106
105
104
0 1 2 3 4 5 6 7 8 9
I A
220 V 50 Hz 1 AC 360 cycles/h
4
Electronic timer CT-ERD
ON-delayed with 1 c/o contact
Data sheet
Dimensional drawings
Dimensions in mm
58 22.84“
6.89“ 1.97“
17,5 5 43,4 17.05“
70 27.56“
45 17.72“
2CDC 252 190 F0005
5
Printed in the Federal Republik of Germany (08/05)
Druckschrift-Nummer. 2CDC 111 046 D0201
ABB STOTZ-KONTAKT GmbH
Eppelheimer Straße 82 69123 Heidelberg, Deutschland
Postfach 10 16 80 69006 Heidelberg, Deutschland
Internet http://www.abb.com/lowvoltage -> Control Products -> Electronic Relays
E-Mail epr-support@stotzkontakt.de
