Installation Manual
Installations of IDEC Intrinsically Safe System

6-64, Nishi-Miyahara 2-Chome, Yodogawa-ku,
Osaka 532-0004, Japanwww.idec.com

Draw.No.B-1340-4Rev.B
Apr.26, 2013

Type EB3C-N Relay Barrier

AIS / I,II,III, / 1 / A,B,C,D,E,F,G / Ta = 60oC
[I /0] / AEx [ia] / IIC / Ta = 60oC
When installing an IDEC Relay Barrier, make sure it conforms to the following drawings and descriptions as well as all applicable requirements.
The Relay Barrier must have “EB3C-N” in the part number.
The Relay Barrier must be located in a safe area (unclassified location).
Intrinsically safe apparatuses such as switches approved or considered to be “simple apparatuses” may be located in a hazardous (classified) area.

Warning !

Substitution of components may impair intrinsic safety･Certified Barrier: Type EB3C-abcdeN “EB3C-…N”= Series type01, 02, 03, 05, 06, 08, 08C, 10, 16C(C: common wiring only)a = Output
R: Relay, T: Transistor,b = channels
c = Signal type K: Sink, S: Source(for 08C & 16C)
e = connection Blank: Terminal, -C: Connectord = Power supply A: 100~240Vac, D: 24Vdc･Rating and Parameters of I.S.
Ta= 60°C, Um= 250V, Uo=13.2V, Io= 14.2mA, Po= 46.9mW at each channel Pn-Nn
Io=227.2mA, Po= 750mW at max 16 channels 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 Note 2 ThePo(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 Lo(mH) intrinsic safeapparatus and0.67 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
wirings shall be
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
0.5accordance toCo(µF)
following formulas;
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
for examples,
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
Ui> UoIi> Io
Note 1 Added to above table, the next values combined Lo and Co are allowable;
Pi> PoIo(mA)
14.2
28.4(for examples at 2channels)
227.2
Ci+Cc<Co
Lo(mH) 175* 87.5 30.0 2.5 0.55 0.25 43.5* 21.5 20.0 3.5 0.43 0.25 0.68* 0.34 0.68 0.6 0.22 0.13
Li+Lc < Lo
Co(µF) 0.94* 0.47 0.33 0.54 0.77 0.90 0.94* 0.47 0.30 0.48 0.80 0.90 0.94* 0.47 0.45 0.49 0.80 0.90*: Therefore, the values are allowable only at Li<1%Lo and Ci<1%Co of the intrinsic safe apparatus.
Wiring Example(IS terminals: Pn = +, Nn = - )Channel s eparat e wi ring (an y one channel)
HAZAR DOUS (C LAS S IF IE D) LOC AT ION
Class I, II and III, Di vision 1, Groups A, B, C, D, E, F a nd GClass I, Zon es 0 and 1, Groups IIC, IIB and IIA

Channel com mon wi ring (Common ma x. 16 bet ween an y Pn(+) t erminals and an y Nn(-) terminal )Not e:To s et up comm on wiri ng, connect t wo "N" terminals bet ween adjoining Rela y B arri ers in parallel.
H AZARD OUS (C LASS IF IE D) LOC AT IO N Class I, II and III, Division 1, Groups A, B, C, D, E, F and G
Class I, Zones 0 and 1, Groups IIC, IIB and IIA
Common 12

Notes
1. Use intrinsically safe equipment that is FM Approved or simple apparatus (a device which will neither generate nor store more than 1.5V, 0.1A,25mW such as switches, thermocouples, LED’s and RTD’s).
2. Install the EB3C-N relay barrier in compliance with the enclosure, mounting, spacing, and segregation requirements of the ultimate application.
3. Make sure that the control equipment connected to the EB3C-N relay barrier does not use or generate more than 250 Vrms or Vdc(Um = 250V).
4. Install the EB3C-N relay barrier in accordance with ANSI/ISA RP12.06.01 “Installation of Intrinsically Safe Systems for Hazardous (Classified)
Locations” and National Electrical Code (ANSI/NFPA 70).
5. Make sure that all bolts, nuts, screws, and other means of fastening, including the unused wiring screws, are fastened in place, properly tightenedand secured. Mount the EB3C-N on a 35mm track or directly on a panel surface using screws.
6. Make the layout and wiring so as to prevent the electromagnetic or electrostatic inductions to the intrinsically safe circuit. For example, separate
the intrinsically safe circuit from the non-intrinsically safe circuit by a minimum space of 50 mm or using a full height metal separator.
If color-coding is required for the intrinsic safe components and terminals, use only cables and terminals with light blue markings.
* No revision to this drawing without prior FM approval.