_______________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Tel: +44 (0)208 743 8880
www.e2s.com
Fax: +44 (0)208 740 4200
Document No. D202-00-201-IS_Issue_1 07-05-2019
Sheet 5 of 8
M/S 1
M/S 2
+ -
+ -
1 3
4 6
SERIES 1
SERIES 2
EOL 1
EOL 2
Series (In line) device;
•
resistor – SxxxR
•
diode – SD1
•
zener – SxxxZ
•
LED
11) Wiring Unit
The units come with two options for the terminal block.
A DIN rail version which has 8-way connection and allows for
full configuration at factory or limited wiring of EOL devices by
customer.
The PCB Terminal Version has a 6-way connector but is
designed to allow for full configuration with Series and EOL
devices in a number of wiring configurations.
For EOL and Series device limitations and configurations see
Section 12.
For full wiring details see wiring diagrams page 7 & 8.
Wiring Connections for 8-Way DIN Rail
Fig. 4 DIN Rail in Base
Wiring Connections For 6-Way PCB Terminal Board
Fig. 5 PCB Terminal Block in Base
See section 12 and pages 7 & 8 for details of adding Series
and EOL devices on the PCB. This can either be done at the
order stage or added to the correct terminal blocks afterward.
All devices must comply with the requirements stipulated in
section 12.
12) End-of-Line and Series Devices
All models can be fitted with series resistors, end-of-
line monitoring resistors, monitoring diodes, zener
diodes and also specific customer modules if supplied
with direct current up to 48Vdc and limited to a
maximum total power consumption no greater than
6.224W.
Min. resistor values and current limitations must be observed
depending on supply voltage and type of components fitted. If
a combination of resistors / diodes / zener diodes is used,
values for all components must be observed and lowest
current limit for either component becomes overall limit.
Current limitation for units fitted with end-of-line resistors,
diodes or zener diodes must be ensured by using a current
limited power supply or fitting a current limiting resistor at the
control panel (not provided).
The following table 1 shows limitations for all possible
variations:
EOL (End of line) device;
•
resistor – ExxxR
•
diode – ED1
•
zener – ExxxZ
Microswitch 1 = M/S 1
Microswitch 2 = M/S 2
The unit can be wired with a maximum of 4 module devices –
see wiring diagrams.
Please refer to wiring diagrams on sheets 7 & 8.
Note: - The maximum voltage stated must not be exceeded,
as the internal resistor modules are rated as compliant with
Ex d according to the unit voltage.
If lower value resistors than seen on table are required it may
be possible to configure but seek advice from E2S to ensure
compliance is still maintained.
Supply
voltage
24Vdc
Supply
voltage
48Vdc
Type of
component fitted
value
Max.
current
mA
value
Max.
current
mA
End-of-Line
Resistor
*See note
min.
470R/2W
or
min.
2k2/0.5W
3000
min.
2k2/2W
or
min.
8k2/ 0.5W
1000
End-of-Line Diode
Type 1N5401
2W
59.13
2W
25.26
Series Resistor
*See note
min. 470R
/ 2W
or
min.
2k2/0.5W
3000
min.
2k2/2W
or
min.
8k2/0.5W
1000
Series Diode
Type 1N5401
2W
59.13
2W
25.26
Series Zener Diode
Type 1N5333B
3.3V
230
3.3V
230
4.7V
162
4.7V
162
5.1V
149
5.1V
149
5.6V
136
5.6V
136
6.2V
122
6.2V
122
6.8V
112
6.8V
112
10V
76
10V
76
12V
63
12V
63
6 4
3 1
- +
- +
M/S 2
M/S 1
