K-Patents PR-23 User Manual

9 Sensor specicaons
145
Notes:
In the United States, installation must be in accordance with the applicable require-
ments of ANSI/ISA RP12.6 and the national electrical code (ANSI/NFPA 70). In
Canada installation must be in accordance with the applicable requirements of Cana-
dian electrical code part I C22.2.1 section 18 and appendix F. Associated Apparatus
manufacturer’s installation drawing shall be followed when installing this equipment.
Ex ia is deined as Intrinsically Safe. The intrinsic safety concept allows the intercon-
nection of two intrinsically safe devices. FM approved and CSA certiied entity para-
meters are not speciically examined in combination as a system when:
Uo or Voc or Vt <= Vmax,
Io or Isc or It <= Imax
Ca or Co >= Ci + Ccable or
La or Lo >= Li + Lcable, Po < Pi.
Control equipment connected to the Associated Apparatus shall not use or generate
more than 250 Vrms or Vdc. Important: Use supply wires suitable for 5 K above
surrounding environment.
For Division 1 installations, the coniguration of Associated Apparatus shall be FM
Approved/CSA Certiied under Entity Concept.
Cables for intrinsically safe installation:
− 10 m (33 ft) cable, part number PR-8230-010, connecting the Indicating transmit-
ter STR/Multichannel user interface MI and the Isolator unit.
The maximum cable length is 100 m (330 ft).
− 10 m (33 ft) power cable, part number PR-8250-010, connecting the Indicating
transmitter STR/Multichannel user interface MI and the Isolator unit, part number
PR-8250-010. The maximum length is 100 m (330 ft).
− The intrinsically safe cable between Isolator unit and sensor, part RP-8260-xxx,
where xxx is the cable length in meters. The maximum length is 200 m (660 ft).
For cable connections see Figures 9.38 and 9.41.
Note: Isolator/Barrier Unit can also use an optional external +24V DC power supply
instead of the +24V DC power supply from the transmitter/MI. +24V DC is connected
to terminals 13 and 14. (If +24V DC is used, the PR-8250 power cable is not used at
all.)
9.11.3 Isolator/barriers
Isolator unit wiring is explained below in Figure 9.41.
Note: If the power to Isolator unit terminals is not correctly connected, +24V DC
to terminal 14 (+vs) and zero to terminal 13 (-vs), the transmitter STR/Multichannel
user interface MI will give the message No signal. Also if terminals 11 and 12 are not
correctly connected, sensor cable connecting terminal 2 of the Indicating transmitter
STR/Multichannel user interface MI to the Isolator unit terminal 11 (-ve) and terminal
1 of the STR/MI to Isolator unit terminal 12 (+ve) , the message No signal will appear.

K-Patents PR-23 Specifications

General

Brand	K-Patents
Model	PR-23
Category	Measuring Instruments
Language	English