Metex 3200U Ultrasonic Flow & Level Monitor - Manual (Page 31)

SENSOR INTRINSIC SAFETY - OPTION ISB
Ultrason Sensors (with built-in temperature compensation)
When connected through an Intrinsic Safety Barrier, the AquaMetrix Ultrason sensors are CSA certified
for installation in a hazardous location rated:
Class I, Groups C,D
Class II, Groups E, F and G
Class III
Intrinsic Safety Barriers may be ordered with the AquaMetrix instrument and are supplied mounted in
the AquaMetrix instrument enclosure. Replacement barrier fuses (Part No. ISB-011239) may be
purchased separately. Barriers must be installed in the sensor cable between the safe and hazardous
locations, and must be mounted in either the safe or Div. 2 area. Barriers may be plate, busbar or rail
mounted.
Intrinsic Safety Barrier Specifications: Certified, rated 17.5V max, 95 ohms min. (Recommended: Stahl
Model 9001/02-175-200-10).
AquaMetrix
Ultrason
Page 31
T.DUCER
N.O C N.C N.O C N.C N.O C N.C
RELAY 1 RELAY 2 RELAY 3
L N G AC
RX PU GND TX
RS 232
N.O C N.C N.O C N.C
RELAY 4 RELAY 5
N.O C N.C
RELAY 6 4 - 20
OPTIONAL
3
4
1
2
NOTE:
MUST BE
BARRIER-EQUIPPED UNITS
ARE FACTORY-WIRED WITH
GROUND THROUGH THE
INSTRUMENT CHASSIS.
POWER INPUT GROUND
CONNECTED TO A
GOOD GROUND (<1 Ohm) WITH
A 12 AWG CONDUCTOR
REPLACEMENT FUSE ASSEMBLY
ORDER PART NO. ISB-011239 (160mA)
NON-HAZARDOUS LOCATION
HAZARDOUS LOCATION
CLASS I, GROUPS C,D
CLASS II, GROUPS E,F,G
CLASS III
INTRINSIC SAFETY BARRIER
SENSOR
A M qua etrix