IDEC EB3N Safety Relay Barrier Installation Guide
- June 5, 2024
- IDEC
Table of Contents
IDEC EB3N Safety Relay Barrier
Type EB3N Relay Barrier
Associated Apparatus providing Intrinsically safe outputs for use in the
following hazardous(classified) locations.
ClassⅠ, Zone 0, [AExia]IIC
ClassⅠ,Ⅱ,Ⅲ, Div. 1.GrpsA,B,C,D,E,F and G
Installation
- 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 6H/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 ･Control equipment must not use or generate more than 120 V rms or dc with respect to earth.
- For installations in which both the Ci and Li of the intrinsically safe apparatus exceeds 1% of the Co and Lo parameters of the associated apparatus (excluding the cable), then 50% of Co and Lo parameters are applicable and shall not be exceeded.
- 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.
WARNING : Substitution of components or unauthorized repair may impair
intrinsic safety of apparatus.
AVERTISSEMENT : La substitution de composants peut compromettre la
sécurité intrinsèque de l’appareil.
- 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 “EB3N”= 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| Note 2 The intrinsic safe apparatus and wirings shall be accordance to
following formulas; for examples, Ui > Uo
Ii > Io
Pi > Po
|
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
Lo(mH)|
Po(mW)| 46.9| 93.8| 140.6| 187.5| 234.3| 281.2| 328.1| 375.9| 421.8| 468.7|
515.5| 562.4| 609.2| 656.1| 702.9| 750|
| 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|
Co(uF)| 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;
Ci+Cc < Co Li+Lc < Lo
*:Therefore, only in combination with a cable this values are allowable at Li < 1%Lo and Ci < 1%Co of the intrinsic safe apparatus apparatus.
|
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| 46.9mA
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
Connection Number| Type No.| Unit Number| Available Maximum Safe Circuit
Channel| Available AUX Circuit Channel| Total Io [mA]
---|---|---|---|---|---
1|
EB3N-□2□D
| 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
| 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| 1| 4| 5| 184.6
EB3N-□2□5□D| 1
8| EB3N-□2□D| 2| 6| 4| 227.2
EB3N-□2□5□D| 1
＊| EB3N-□2□D| 3| 8| 0| 227.2
EB3N-□2□5□D| 1
＊
| EB3N-□2□D| 1|
6
|
4
|
227.2
EB3N-□2□5□D| 2
＊| EB3N-□2□D| 1| 8| 0| 227.2
EB3N-□2□5□D| 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.
IDEC CORPORATION
6-64, Nishi-Miyahara, 2-Chome, Yodogawa-Ku,
Osaka 532-0004, Japan www.idec.com
Draw. No. B-1156-4
Rev. B, Oct. 15, 2014