User Manual Owner's manual

Publication 1797-6.5.2 - February 2001
A-4 Specifications
 The entity concept allows interconnection of intrinsically safe
apparatus with associated apparatus not specifically examined in
combination as a system when the approved values of V
t
and I
t
of the
associated apparatus are less than or equal to V
oc
and I
sc
or V
max
and I
max
of the intrinsically safe apparatus and the approved values of C
a
and L
a
of the associated apparatus are greater than C
i
+ C
cable
and L
i
+ L
cable
respectively for the intrinsically safe apparatus.
ó Simple apparatus is defined as a device which neither generates
nor stores more than 1.2V, 0.1A, 20
µ
J, or 25mW.
ì Wiring methods must be in accordance with the National Electric
Code, ANSI/NFPA 70, Article 504 and 505 or the Canadian Electric
Code CSA C22.1, Part 1, Appendix F. For additional information refer
to ANSI/ISA RP12.6.
ö This module, 1797-IRT8, must be used with terminal base
1797-TB3 or 1797-TB3S.
ú Terminals 36 and 49 shall not be connected.
÷ WARNING: Substitution of components may impair intrinsic
safety.
AVERTISSEMENT: La substitution de composant peut compromettre
la securite intrinseque.
1797- IRT8
Allen-Bradley
B
-
A
7 PWR6543210
2
8 Point RTD/Thermocouple mV Input Module
FLEX Ex Temperature
Input I/O Module
LEDs
Female Bus
Connection
Field Wiring
Terminals
Terminal Base
Terminal Base
Key
Male Bus
Connection
Key Position for
Terminal Base
Insertion
Note: A terminal base may not have an I/O module installed.