User Manual
9
95-8493
APPENDIX B
INTRINSICALLY SAFE
CLASS B, STYLE B WIRING
Hazardous (Classified) Locations:
Class I, Division 1, Group C, D
Class I, Division 2, Group A, B, C, D
Class II, Division 1, Group E, F, G
Class II, Division 2, Group F, G
Class III, Division 2
PM-5MP
OR
PM-5MP+
V+
V+
POWER RETURN
POWER RETURN
TROUBLE +
TROUBLE –
ALARM +
ALARM –
ALARM –
ALARM +
END OF LINE DEVICE
HAZARDOUS LOCATIONS:
CLASS I, DIV. 1, GP. C, D
CLASS II, DIV. 1, GP. E, F, G
CLASS III, DIV. 2
NON-HAZARDOUS LOCATION
SAFETY BARRIER
SAFETY BARRIER
CONTROL ROOM
INSTRUMENTATION
OPERATING AT OR
LESS THAN 250
VOLTS RMS.
+24 VDC
DC RETURN
ALARM +
ALARM –
NOTES: 1. SUITABLE FOR INTRINSICALLY SAFE
INSTALLATION IN CLASS I, DIV. 1, GP. C,
D; CLASS I, DIV. 2, GP. A, B, C, D; CLASS
II, DIV. 1, GP. E, F & G; CLASS II, DIV. 2,
GP. F & G. CLASS III, DIV. 2 HAZ-
ARDOUS LOCATIONS. WIRING METH-
ODS SHALL BE INSTALLED IN ACCOR
DANCE WITH ANSI/NFPA 70 (NEC),
ANSI/NFPA 72 AND ISA RP 12.6.
2. I. S. BARRIERS MUST BE INSTALLED IN
ACCORDANCE WITH THE
MANUFACTURER’S GUIDELINES.
3. THIS DRAWING SHOWS ONE SENSOR
CONNECTED IN A CLASS B, STYLE B
CONFIGURATION PER NFPA 72.
MULTIPLE SENSORS MAY NOT BE
CONNECTED TO THE SAME BARRIER.
AN END OF LINE DEVICE (EOL) IS
REQUIRED TO MONITOR LINE
CONTINUITY.
4. END OF LINE DEVICE VALUE PLUS
BARRIER RESISTANCE MUST PROVIDE
ADEQUATE SUPERVISION CURRENT
FOR FIRE ALARM CONTROL PANEL.
5. RESISTANCE BETWEEN BARRIER
GROUND AND EARTH GROUND MUST
NOT EXCEED ONE OHM.
6. PM-5MP AND PM-5MP+ INTERCON-
NECT VIA FLYING LEAD. EXTENSION
CABLE SHALL COMPLY WITH
ANSI/NFPA 70 (NEC) ARTICLE
504-30(b)(2).
7. CABLE SHIELD MUST BE TIED TO
INTRINSIC SAFETY GROUND AT THE
BARRIER.
8. THE PM-5MP AND PM-5MP+ SENSORS
HAVE BEEN SYSTEM APPROVED WITH
THE FM APPROVED BARRIERS LISTED
IN THE BARRIER TABLE.
9. MAXIMUM CABLE LENGTH: 1000 FEET.
FIRE SENSOR
ELECTRICAL INTERFACE
Wire Color Signal
Red V+, Input Power
Orange V+, Input Power
Black Power Return
Brown Power Return
Yellow Alarm +
Green Alarm +
Blue Alarm –
Violet Alarm –
Gray Trouble +
White Trouble –
BARRIER PARAMETERS
MODEL MANUFACTURER Vt (V) It (MA)
9002/77-280-094-00 STAHL 28.1 87.0
Z978 PEPPERL + FUCHS 30.0 93.0
7278ac MTL 28.0 94.0
BARRIER TABLE
Figure B1—Intrinsically Safe Class B, Style B Wiring (Drawing No. 420032)