IDEC EB3N-2 Intrinsic Safety Barrier Instruction Manual
- June 15, 2024
- IDEC
Table of Contents
EB3N-2 Intrinsic Safety Barrier
IDEC CORPORATION
7-31, Nishi-Miyahara 1-Chome, Yodogawa-ku,
Osaka 532-8550, Japanwww.idec.com
Tel: +81-6-6398-2571, Fax: +81-6-6392-9731
Type EB3N-2 Relay Barrier
Associated Apparatus providing Intrinsically safe outputs for use in the
following hazardous(classified) locations.
ClassⅠ, Zone 0, [AEx ia Ga]IIC
ClassⅠ,Ⅱ,Ⅲ, Div. 1.GrpsA,B,C,D,E,F and G
When installing an IDEC Type EB3N-2 Relay Barrier, make sure it conforms to
the following drawings and descriptions as well as all applicable
requirements. ANSI/NFPA70.
- This associated apparatus may also be connected to simple apparatus as defined in Article 504.2 and installed and temperature classified in accordance with Article 504.10(B) of the National Electrical Code (ANSI/NFPA 70), or other local codes, as applicable.
- Capacitance and inductance of the field wiring from the intrinsically safe equipment to the associated apparatus shall be calculated and must be included in the system calculations as shown in Note 2 of Table 2 below. Cable capacitance, Ccable, plus intrinsically safe equipment capacitance, Ci must be less than the marked capacitance, Ca (or Co), shown on any associated apparatus used. The same applies for inductance (Lcable, Li and La or Lo, respectively). Where the cable capacitance and inductance per foot are not known, the following values shall be used: Ccable = 60 pF/ft., Lcable = 0.2 µH/ft.
- Associated apparatus must be installed in an enclosure suitable for the application in accordance with the National Electrical Code (ANSI/NFPA 70) for installation in the United States, the Canadian Electrical Code for installations in Canada, or other local codes, as applicable.
- Where multiple circuits extend from the same piece of associated apparatus, they must be installed in separate cables or in one cable having suitable insulation. Refer to Article 504.30(B) of the National Electrical Code (ANSI/NFPA 70) and Instrument Society of America Recommended Practice ISA RP12.6 for installing intrinsically safe equipment.
- Intrinsically safe circuits must be wired and separated in accordance with Article 504.20 of the National Electrical Code (ANSI/NFPA 70) or other local codes, as applicable.
- This associated apparatus has not been evaluated for use in combination with another associated apparatus.
- Control equipment must not use or generate more than 120 V rms or dc with respect to earth.
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.
Servicing – Replacement and Repairs: Inspection and replacement of the
Relay Barriers shall not be made until power is disconnected and shall not be
connected again until all replacement Relay Barriers are properly re-
assembled.
All electrical components, including the interconnecting wiring, shall be kept
in safe condition. Defective Relay Barriers should be returned to the factory
for repair.
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 Relay Barrier on a 35mm track or directly
mount on a panel surface using screws.
Certified Relay Barrier: Type EB3N-abc-2 “EB3N-2” = Series type
a = Safety circuit A2 : for auto start, 2 I/O M2 : for manual
start, 2 I/O
b = Auxiliary circuit N : without auxiliary circuit, R5 :, relay
output, 5 I/O
c = Power supply D : 24V DC
Table 1:Operations
| Terminals|
Ratings
---|---|---
Power Supply| Input: + , –| 24V DC (-15%,+10%) Class 2
**** Safe 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
･Table2:Rating and Parameters of I.S.
Ta= 40°C, Um= 125V Uo=13.2V
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
I.S rating of each terminal as follows.
| I.S. Terminal No.
---|---
11-12 and 21-22| 11-12 21-22 (P1～P5)-N
Uo(Vt)| 13.2V| 13.2V
Io(It)| 28.4mA| 14.2mA
Po| 93.8mW| 46.9mW
Typical Installation:
Install the Relay Barrier must be according to the following Ratings and
Parameters of I.S. and descriptions.
To avoid electrical shock, install the 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 : To set up common wiring, connect two “ N “ terminals
between adjacent the Relay Barrier in parallel.
Connections:
Connect
the wires to the Relay Barriers according to the following formula:
Also, refer to Table.3
Table 3
Connection Number| Type No.| Unit Number| Available Maximum
Safe Circuit Channel| Available AUX
Circuit Channel| Total Io [mA]
---|---|---|---|---|---
1| EB3N-□2□D-2| 1| 2| 0| 56.8
2| 2| 4| 0| 113.6
3| 3| 6| 0| 170.4
4| 4| 8| 0| 227.2
5| EB3N-□2□5□D-2| 1| 2| 5| 127.8
6| 2| 4| 8| 227.2
＊| 3| 6| 4| 227.2
＊| 4| 8| 0| 227.2
7| EB3N-□2□D-2| 1| 4| 5| 184.6
EB3N-□2□5□D-2| 1
8| EB3N-□2□D-2| 2| 6| 4| 227.2
EB3N-□2□5□D-2| 1
＊| EB3N-□2□D-2| 3| 8| 0| 227.2
EB3N-□2□5□D-2| 1
＊| EB3N-□2□D-2| 1| 6| 4| 227.2
EB3N-□2□5□D-2| 2
＊| EB3N-□2□D-2| 1| 8| 0| 227.2
EB3N-□2□5□D-2| 3
＊: since these are included in the other connection number circuit, actual
wiring does not need.
Note. The current for intrinsically safe circuit per channel is 28.4mA.
The Lo and Co values given are the sums of the values that may be connected to
each individual channel.
[No.1 Type EB3N-□2□D-2 ]
Uo =13.2V
Io =56.8mA
Po=187.5mW
Lo,Co:Refer to Table2
N1 and N2 terminals are no-connection.
[No.2 Type EB3N-□2□D-2 ]
Uo =13.2V
Io =113.6mA
Po=375.9mW
Lo,Co:Refer to Table2
[No.3 Type EB3N-□2□D-2 ]
Uo
=13.2V
Io =170.4mA
Po=562.4mW
Lo,Co:Refer to Table2
[No.4 Type EB3N-□2□D-2]
Uo
=13.2V
Io =227.2mA
Po=750mW
Lo,Co:Refer to Table2
[No.5 Type EB3N-□2□5□D-2]
Uo =13.2V
Io =127.8mA
Po=421.8mW
Lo,Co:Refer to Table2
N1 and N2 terminals are no-connection.
[No.6 Type EB3N-□2□5□D-2 ]
Uo =13.2V
Io =227.2mA
Po=750mW
Lo,Co:Refer to Table2
[No.7 Type EB3N-□2□D-2 + EB3N-□2□5□D-2 ]
Uo =13.2V
Io =184.6mA
Po=609.2mW
Lo,Co:Refer to Table2
[No.8 Type EB3N-□2D-2□ + EB3N-□2□5□D-2 ]
Uo =13.2V
Io =227.2mA
Po=750mW
Lo,Co:Refer to Table2