IDEC EB3N-M2R5D Intrinsic Safety Barrier Instruction Manual
- June 15, 2024
- IDEC
Table of Contents
EB3N-M2R5D Intrinsic Safety Barrier
Installation Manual
IDEC CORPORATION
6-64, Nishi-Miyahara 2-Chome, Yodogawa-ku,
Osaka 532-0004, Japan www.idec.com
Certificate No. IECEx DEK 21.0070
Draw. No. B-2284-2(0)
Rev.E
JULY. 22, 2022
Type EB3N Relay Barrier (Safety Relay Barrier)
Intrinsically Safe System [Ex ia Ga]IIC [Ex ia Da]IIIC
When installing an IDEC Type EB3N Safety Relay Barrier, make sure it conforms
to the following drawings and descriptions as well as all applicable
requirements.
IEC Standard IEC 60079-0:2017(Ed.7), IEC 60079-11:2011(Ed.6), IEC
60079-25:2020(Ed.3), IEC 60079-14:2013(Ed.5) All intrinsically safe systems
must have “EB3N” in the part number. The Safety Relay Barrier must be located
in a safe area (non-hazardous area). The intrinsically safe apparatus, such as
the Contact certificated, approved or considered to be a “simple apparatus”
such as the Switch specified by standard, may be located in the hazardous
area.
Servicing – Replacement and Repairs: Inspection and replacement of the
Safety Relay Barriers shall not be made until power is disconnected and shall
not be connected again until all replacement Safety Relay Barriers are
properly re-assembled. All electrical components, including the
interconnecting wiring, shall be kept in safe condition.
Defective Safety Relay Barriers should be returned to the factory for repair.
Warning ! Substitution of components or unauthorized repair may impair
intrinsic safety of apparatus.
To maintain intrinsic safety, the Signal input terminal (n1-n2, Pn-N3) may
only be connected to intrinsically safe circuits where both the wiring and the
connected equipment maintain 500 V isolation to the hazardous area
earthing/bonding connections.
Mounting : All bolts, nuts, screws, and other means of fastening,
including the unused wiring screws, shall be fastened in place, properly
tightened and secured. Mount the Safety Relay Barrier on a 35mm track or
directly mount on a panel surface using screws.
Certified Safety Relay Barrier: Type EB3N-abc “EB3N”= Series type
a = Safety circuit A2 : for auto start, 2 I/O M2 : f or manual
start, 2 I/O
b = Auxiliary circuit N : without auxiliary circuit, R5 : relay
output, 5 I/O
c = Power supply D : 24V DC
Operations
| Terminals|
Ratings
---|---|---
Power Supply| Input: +,-| 24V DC (-15%,+10%)
Safety Circuit| Input: 11-12, 21-22| 12V DC, 10 mA (source)
Output: 13-14, 23-24| 2NO: DC-13 24V, 1A(Ind.) 30V DC, 1A(Res.)
Auxiliary Circuit| Input: P-N| 12V DC, 10mA (source)
Output: A-C| 5NO/common: 24V DC, 3A(Res.)
Reset Circuit| Input: Y1-Y2| 24V DC, 5 mA
Rating and Parameters of I.S.
Ta= 60°C, Um= 250V, Uo=13.2V, Io= 14.2mA, Po= 46.9mW at each terminals (channels) 11-12, 21-22, Pn-Nn
Io(mA)| 14.2| 28.4| 42.6| 56.8| 71.0| 85.2| 99.4| 113.6| 127.8| 142.0| 156.2|
170.4| 184.6| 198.8| 213.0| 227.2| Combined Lo(mH)
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
Po(mW)| 46.9| 93.8| 140.6| 187.5| 234.3| 281.2| 328.1| 374.9| 421.8| 468.6|
515.5| 562.4| 609.2| 656.1| 702.9| 750
Co(μF)
| 0.67| 0.65| 0.63| 0.61| 0.59| 0.57| 0.55| 0.53| 0.51| 0.49| 0.47| 0.44|
0.42| 0.39| –| –| 1.0
0.79| 0.77| 0.76| 0.75| 0.73| 0.72| 0.70| 0.69| 0.67| 0.66| 0.64| 0.62| 0.61|
0.59| 0.57| 0.55| 0.5
0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.93| 0.92| 0.91| 0.90| 0.88| 0.87|
0.86| 0.85| 0.84| 0.2
0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94| 0.94|
0.94| 0.94| 0.94| 0.1
Note 1 Added to above table, the next values combined Lo and Co are allowable;
Io(mA)| 14.2| 28.4| 227.2
Lo(mH)| 176| 88.0| 2.50| 1.60| 0.84| 0.48| 0.25| 44.0| 22.0| 3.50| 1.40|
0.76| 0.45| 0.25| 0.68| 0.68| 0.60| 0.42| 0.30| 0.22| 0.15
Co(μF)| 0.94| 0.47| 0.55| 0.60| 0.70| 0.80| 0.94| 0.94| 0.47| 0.48| 0.60|
0.70| 0.80| 0.93| 0.94| 0.45| 0.49| 0.60| 0.70| 0.80| 0.94
*: Therefore, the values are allowable only at Li<1%Lo or Ci<1%Co of the intrinsic safe apparatus.
Note 2 The intrinsic safe apparatus and wirings shall be accordance to
following formulas; for examples,
Ui > Uo
Ii > Io
Pi > Po
Ci+Cc < Co
Li+Lc < Lo
Typical Installation:
Install the Safety Relay Barrier must be according to the following Ratings
and Parameters of I.S.
and descriptions. To avoid electrical shock, install the Safety Relay Barrier
in a tool-accessible enclosure.
Layout and wiring must be done to prevent the inductive or capacitive
induction to the intrinsically safe circuit.
For example, separate intrinsically safe circuits from non-intrinsically safe
circuits, by a minimum space of 50mm or using a full height metal separator.
If color-coding is required use for the intrinsic safe components and
terminals, use only cables and terminals with light blue markings. Common
wiring (max 16 channels): To set up common wiring, connect two “ N “ terminals
between adjacent the Safety Relay Barrier in parallel. Maintain at least 3 mm
clearance between the external connection terminals and the grounded metal
part.
Dielectric Strength:
Between intrinsically safe circuit and non-intrinsically safe circuit 1526.4V AC.
Example of connections:
The marks indicate the samples of single intrinsic safe circuits 
References
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