Installation Instructions for
ISS-100 I ntrinsi cally Safe Switch
2880 North Plaza Drive, Rapi d City, Sout h Dakota 57702
(800) 843-8848 · (605) 348-5580 · fa x (605) 348-5685
www.symcom.com
WA RNING: TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTABLE ATMOSPHERES, DISCONNECT
POW ER FRO M THE SYSTEM PRIOR TO INST ALLATION OR SERVICE.
CAUTI ON: Installation must comply with all national, state, and local codes. Installation of this equipment should only
be perf ormed by personnel trained in i ntr insically saf e systems. Im proper install ation m ay result i n serious
inj ury or damage. Bef ore proceedi ng with i nstallati on, read and under stand these i nstructi ons com pletely .
The ISS-100 Isolat ed Swi tch i s UL913 listed as an associ ated apparatus f or i nterf acing between hazardous a nd non-
hazardous areas. The IS S-100 m ust be i nstalled i n a non-hazardou s area. Follow SymCom’s Control Drawi ng ISS-100 on
the back of thi s sheet f or proper installation.
All wi ring connect ed to a hazardous l ocati on m ust be separated fr om all non-i ntrinsicall y saf e wiri ng. Descri ption of special
wi ri ng m ethods can be f ound i n the National Electrical Code ANSI /NFPA 70, Articl e 504 Intrinsicall y Saf e Systems. Check
your state and l ocal codes f or additional requi rements.
WAR NING : REMOVE POWER FROM THE SYSTEM PRIOR TO INSTALLING OR SERVICING THE ISS-100.
Installation:
1. Mount the ISS-100 in a non-hazardous location on 35mm DIN rail , or by installing two #6-#8 screws into the
s urface mounting holes provided.
2. Connect wiring per SymCom’s Control Drawing ISS-100. Follow all hazardous code requirements while installing
wiri ng to swi tch i nput termi nals.
Operation:
The ISS-100 rel ay i s powered wi th 115VAC and i s designed as an isolated swi tch sui tabl e f or appl ications with switc h
inputs in a hazardous l ocati on. In a powered stat e, the ISS-100 wi ll close i ts output relay when the input swi tch i s cl osed.
The green LED on the cover wi ll illumi nate when the relay i s energi zed and exti ngui sh when the relay i s de-energi zed.
MADE IN THE USA
Intri nsically Safe Switch
OUTPUT ENERGIZED
CONTROL DRAWING ISS-100
ASSOCIATED APPARATUS / APPAREILLAGE CONNEXE
2880 North Plaza Drive, Rapi d City, Sout h Dakota 57702
(800) 843-8848 · (605) 348-5580 · fa x (605) 348-5685
www.symcom.com
115 VAC
INPUT
ISS-100
OUTPUT ENERGIZED
LOAD
See Notes 1 & 2
See Note 3
Capacita nce and i nductance of the f ield wiring from the intri nsically saf e equi pm ent t o the associated apparatus shall be calcul at ed
and must be i ncluded i n th e system cal culations as shown in the ta ble above. Cabl e capacitance, Ccable, pl us i ntrinsically safe
equipment capacitance, Ci, must be l ess th an th e marked capacit ance, Ca (or Co), shown on any associated apparatus used. The
sam e applies for i nductance (Lcable, Li and La or Lo, respectively) . W here th e cable capacitance and inductance per foot are not
known, the foll owing values shall be used: Ccable = 60pF/ft., Lcable = 0.2µH/ft.
Non-Hazardous Location
Supply Voltage
90 - 120VAC
Relay Output Rating
8 Amps @ 120VAC General Purpose
Pilot Duty 180VA @ 120VAC, C300
Maximum Ambient T emperatu re Rating
55°C
Hazardous Location
Class I, Divi sions I & II, Groups A, B, C & D;
Class II, Divisions I & II, Groups E, F & G; and
Class III l ocations
NOTES:
1. Maximum distance between uni t and switch contact is 10,000 feet .
2. All non-i ntrinsically safe wiring shall be separated from intrinsicall y safe wi ring.
Descri ption of speci al wi ring m ethods can be found i n the Nati onal El ectri cal Code
ANSI/ NFPA 70, Arti cle 504 Intri nsically Safe Systems. Check your state and l ocal
codes for additional requirem ents.
3.Al l switch contac ts shall be non-energy storing, cont aining no i nductance or
capacit ance.
4. Ent ity Parameters:
Voc = 16.8V Ca = 0.39µF
Isc = 1.2mA Po = Voc * Isc
La = 100mH 4
5. Entity Parameter Relationships:
IS Equipment Associated Apparatus
Vmax (or Ui) ≥ Voc or Vt (or Uo)
Imax (or Ii) ≥ Isc or It (or Io)
Pmax, Pi ≥ Po
Ci + Ccable ≤ Ca (or Co)
L
i
+ L
cable
≤
L
a
(or L
o
)
DEVICE MUST BE INSTALLED IN A SUIT ABLE ENCLO SURE
WARNING!
TO PREVE NT IG NITIO N OF FL AMMABLE OR COMBUSTABLE
AT MOSPHERES, DISCONNECT POWER BEFORE SERVICING.
DEVICE MAY ONLY BE REPAIRED BY THE MANUFACT URER
WARNING!
SUBSTITUTI ON OF COMPONENTS MAY IMPAIR INT RINSIC SAFET Y.
AVERTISSEMENT!
LA SUBST ITUTI ON DE COMPOSANT S PEUT COMPROMETTRE LA
SÉCURITÉ INTRINSÈQUE.