Installation Manual

IDEC CORPORATION
2-6-64, Nishimiyahara, Yodogawa-ku, Osaka
532-0004, Japanwww.idec.com

Draw. No. B-2270-2 (0)Rev.E
JULY. 22, 2022
Certificate No. IECEx DEK 21.0070
When installing an IDEC Type EB3C-N Relay Barrier (thereafter, called Barrier), make sure it conforms to the following drawings anddescriptions as well as all applicable requirements.
IEC Standard IEC 60079-0:2017(Ed.7), IEC 60079-11:2011(Ed.6), IEC 60079-25:2010(Ed.2), IEC 60079-14:2013(Ed.5)

Type EB3C-N Relay Barrier
For Intrinsically Safe System [Ex ia Ga]IIC, [Ex ia Da]IIIC

All intrinsically safe systems must have “EB3C-N” in the part number. 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 theSwitch specified by standard, may be located in the hazardous area.

･Servicing – Replacement and Repairs: Inspection and replacement of Barrier shall not be made until power is disconnected andshall not be connected again until all replacement Barrier are properly re-assembled. All electrical components, including theinterconnecting wiring, shall be kept in safe condition. Defective Barrier 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 (Pn-Nn) 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 Barrier on a 35mm track or directly mount on a panel surface using screws.

･Certified Barrier: Type EB3C-abcdeN “EB3C-…N”= Series typea = Output

R: Relay, T: Transistorc = Signal type K: Sink, S: Source (for 08C, 16C)

b = channels

01, 02, 03, 05, 06, 08, 08C, 10, 16C(C: common wiring only)

d = Power supply A: 100~240Vac, D: 24Vdc

e = connection Blank: Terminal, -C: Connector･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)
Po(mW)

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
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 Lo(mH) apparatus and wirings
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
shall be accordance tofollowing formulas; for0.79 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
0.5Co(μF)
examples,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
Ui
> Uo
Ii
> Io
Note 1 Added to above table, the next values combined Lo and Co are allowable;
Pi> PoIo(mA)
14.2
28.4
227.2
Ci+Cc < CoLo(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
Li+Lc < Lo
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.

･Typical Installation: Install Barrier must be according to the above Ratings and Parameters of I.S. and descriptions.
To avoid electrical shock, install 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 aminimum space of 50mm or using a full height metal separator. If color-coding is required use for the intrinsic safe components andterminals, use only cables and terminals with light blue markings. Interconnection between the Barriers to setting Common Wiring:connect two independent wires in parallel at each two “ N “ terminals between adjacent the Barrier inside the panel. Maintain at least 3mm 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: Themarks indicate the samples of single intrinsic safe circuits, andmarks indicate IS apparatus.
Common Wiring (e.g. Io=227.2mA with 16 channels)

・Operating rating
Power input

EB3C-...A. Terminal L - N

100 ~ 240V AC

EB3C-...D. Terminal + - -24V DC

input EB3C-...
output EB3C-R...

Terminal Pn - Nn 12V DC, 10mA (source)

250V, 3A (but Connector 30V, 1A)
Terminal /Connector
EB3C-T…
24V DC, 100mA
An,- Cn
Note common terminal / connector pin: 8A / 1A

Signal

Separate Wiring (e.g. Io=14.2mA with 1 channel)