Self-Proving Vehicle Grounding Verication System
Diagram Appendix
Page 17.
6.1 DWG 61655 – Installation Drawing with Entity Parameters
61655 RevA
composants peuvent nuira a la securite intrinseque et creer des conditions dangereuses.
Couper l'alimentation avant d'ouvrir la protection. Garder la courvercle clos tant que les
Disconnect power before opening enclosure. Keep cover tight while circuits are
Improper connections, component substitution or tampering may impair intrinsic
.
.
.
alive.
WARNING
WARNING
.
safety and create hazardous conditions.
S/N
.
.
'
Model: ST-47-
circuits sont en etat de marche.
Power Supply VAC, 20VA max.
AVERTISSEMENT
Um
'
YR
OPTIONAL INDICATORS & CONTROL
When system is in bypass both lamps will be out. Use care when bypassed.
SELF-PROVING VEHICLE GROUNDING SYSTEM
Scully Groundhog
AUTO
OFF
R
NONPERMISSIVE
CLASS I ZONE 1 GROUP IIB,T6, Ta=60°C, AEx[ia] IIB ENTITY 61655 (US)
EXPLOSIONPROOF CLASS I DIVISION 1 GROUPS C & D, T6, Ta=60°C, AIS/I/1/CD/ENTITY-61655
G
BYPASS
PERMISSIVE
TM
CLASS I ZONE 1 PER CEC 18.100 (CAN)
USC
Approved
FM
(TB1)
3
2
1
3
2
1
(TB1)
(TB2)
5
6
4
7
8 9
ST-47-115
ST-47-240
OR
1
2
3
4
5
3
2
1
GND FUSE
CONDUIT
SEE NOTE 2
SEE NOTE 2
CONDUIT
ST-47-115-ELK
ST-47-115-EL
EX-PROOF
5" X 10" X 5"
ST-47 MODEL: HOUSING: LIGHTS: BYPASS: POWER:
FEATURES:
YES
YES YES
120 VAC
OR
240 VAC
NOTE: ALL MODELS ARE ALSO AVAILABLE WITH AN ST-47-240H MODULE,
IN THAT CASE, THE MODEL NUMBER WILL HAVE 240 SUBSTITUTED FOR 115.
1. NO REVISION TO DRAWING WITHOUT PRIOR FM APPROVAL.
4. CONTROL EQUIPMENT CONNECTED TO ASSOCIATED APPARATUS MUST NOT USE OR
NOTES:
TERMINAL Voc
PINS 3 TO 2
Isc
MAXIMUM
PINS 2 TO 1
SCULLY GROUND BOLT
Voc = 29.6V
Voc = 28.4V
POWER CAPACITANCE
ALLOWED
INDUCTANCE
ALLOWED
Isc = 0.4mA
Isc = 14.2mA Po = 105mW
Po = 2.8mW
Ca = 0.070uF
Ca = 0.079uF
La = 200mH
La = 200mH
WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
WARNING: TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES,
WARNING: TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES,
READ, UNDERSTAND AND ADHERE TO THE MANUFACTURE'S LIVE MAINTENANCE PROCEDURES.
ASSOCIATED APPARATUS WHEN THE FOLLOWING IS TRUE.
5. THE ENTITY CONCEPT ALLOWS INTERCONNECTION OF INTRINSICALLY SAFE APPARATUS WITH
GENERATE MORE THAN 250 VRMS OR VDC.
6. RESISTANCE BETWEEN INTRINSICALLY SAFE GROUND AND EARTH GROUND MUST BE LESS THAN 1.0 OHM.
DISCONNECT POWER BEFORE SERVICING.
7. INSTALLATION SHOULD BE IN ACCORDANCE WITH ANSI/ISA RP12.06.01 "INSTALLATION OF INTRINSICALLY
SAFE SYSTEMS FOR HAZARDOUS (CLASSIFIED) LOCATIONS" AND THE NATIONAL ELECTRICAL CODE. (ANSI/NFPA 70), OR FOR
8. THE OUTPUT ON THE ASSOCIATED APPARATUS IS NON-LINEAR.
Vmax or Ui > Voc, Vt or Uo
Imax or Ii > Isc, It or Io.
Pmax or Pi > Po
Ca > Ci + Ccable
La > Li + Lcable
2. SEAL FITTINGS MUST BE INSTALLED WITHIN 18 INCHES OF AN EXPLOSION PROOF ENCLOSURE IN A HAZARDOUS LOCATION.
3. THE IMPORTANCE OF MAINTAINING ABSOLUTE SEPARATION BETWEEN INTRINSICALLY SAFE AND
NON-INTRINSICALLY SAFE WIRING CANNOT BE OVER EMPHASIZED!
OR
SCULLY GROUND BALL
(SIMPLE APPARATUS)
JUNCTION BOX
OPTIONAL OPTIONAL
PLUG & SOCKET
CLASS T, DIVISION 1, GROUPS C & D
CLASS T, ZONE 0 AEx ia IIB
HAZARDOUS LOCATION
JUNCTION BOX
OPTIONAL
PLUG & SOCKET
OPTIONAL
OR
GROUND CLAMP
RESISTOR
(SIMPLE APPARATUS)
OR
NOTE: I.S. OUTPUT PIN 2 IS TIED TO GND INTERNAL
TO THE MODULE.
DETAIL A
SCALE: 2X
JUNCTION BOX
OPTIONAL
3
2
2
3
1
2
1
2
1
CLASS T, ZONE 0 Ex ia IIB
HAZARDOUS LOCATION
CLASS T ZONE 1 PER CEC 18.100 (CAN)
CLASS T ZONE 1 GROUP IIB,T6, Ta=60°C, AEx[ia] IIB ENTITY 61655 (US)
EXPLOSIONPROOF CLASS T DIVISION 1 GROUPS C & D, T6, Ta=60°C, AIS/I/1/CD/ENTITY-61655
"INSTALLATIONS IN CANADA PER THE CANADIAN ELECTRIC CODE (C22.1)".
GND
NEUT
HOT
CONTROL
CONTACTS
PWR
Scully Signal Company
Wilmington, MA USA
MaxSafety
®
SYSTEMS
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