Allen-Bradley 1794-IRT8 - Page 23

Publication 1794-6.5.12 - November 1997
2-10 How to Install Your Thermocouple/RTD/mV Input Module
4. If daisy chaining the +24V dc power to the next base unit, connect a
jumper from terminal 50 (+24V) on this base unit to terminal 34 and
from terminal 51 (24V dc common) to terminal 35 on the next base
unit.
!
ATTENTION: To reduce susceptibility to noise, power
TC/RTD/mV modules and digital modules from separate
power supplies. Do not exceed a length of 33 ft (10m) for dc
power cabling.
!
ATTENTION: Do not daisy chain power or ground from
the TC/RTD/mV terminal base unit to any ac or dc digital
module terminal base unit.
!
ATTENTION: The TC/RTD/mV modules do not receive
power from the backplane. +24V dc power must be applied
to your module before operation. If power is not applied, the
module position will appear to the adapter as an empty slot
in your chassis. If the adapter does not recognize your
module after installation is completed, cycle power to the
adapter.
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
34
Channel 0 Channel 1
24V dc
Supply In
Gnd Gnd
24V dc
Supply Out
+V COM +V COM6 Chassis Ground
for Shields
Connections for Terminal Base 1794-TB3G shown
Chassis GndChassis Gnd
+-HL + -HL + -HL + -HL
Channel 2 Channel 3
Channel 4 Channel 5
+-HL + -HL + -HL + -HL
Channel 6 Channel 7
CJC
CJC
Allen-Bradley PLCs