Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: 248-295-0880
- 7 -
http://www.acromag.com
- 7 -
https://www.acromag.com
ELECTRICAL CONNECTIONS
WARNING
–
EXPLOSION HAZARD
–
Do not disconnect equipment unless power has
been removed or the area is known to be non-hazardous.
WARNING
–
EXPLOSION HAZARD
–
Substitution of any components may impair
suitability for Class I, Division 2.
WARNING
–
EXPLOSION HAZARD
–
The area must be known to be non-hazardous
before servicing/replacing the unit and before installing.
Wire terminals can accommodate 14
–
28 AWG (2.08
–
0.081mm
2
) solid or stranded
wire with a minimum temperature rating of 90
o
C. Input wiring may be shielded or
unshielded type. Ideally, output wires should be twisted pair, or shielded twisted
pair. Terminals are pluggable and can be removed from their sockets by prying
outward from the top with a flat-head screwdriver blade. This model supports two
separate isolated input signals at TB1 and TB3. Strip back wire insulation 0.25-inch
on each lead and insert the wire ends into the cage clamp connector of the terminal
block. Use a screwdriver to tighten the screw by turning it in a clockwise direction
to secure the wire (0.5-0.6Nm torque). Since common mode voltages can exist on
signal wiring, adequate wire insulation should be utilized and proper wiring
practices followed. As a rule, output wires are normally separated from input wiring
for safety, as well as for low noise pickup.
Important
–
End Stops:
For hazardous location installations (Class I, Division 2 or
ATEX/IECEx Zone 2), it should utilize two end stops (like Acromag 1027-222) to help
secure modules to the DIN rail (not shown).
Input Connections
Sensor input wires are wired directly to transmitter input terminals at the bottom of
the module (the spring-loaded DIN clip side), as shown in the connection drawing
below. Observe proper polarity when making input connections.
•
Separate transmitter inputs at TB1 and TB3 are isolated from each other and
from their outputs at TB4 and TB6
. As a single transmitter, input 1 is to
TB1/channel 1 and output/power are wired to TB4/output 1. As a signal
splitter, input 1 is to TB1/channel 1 and this signal is transmitted to isolated
outputs at both TB4 and TB6.
•
Inputs are polarized ±, observe proper polarity.
The left-most terminal is the
positive sensor
input and labeled “+”.
The center terminal is signal return. The
rightmost terminal is not used in this model. See the connection figure below.
TIP (Mounting):
For best performance, it is recommended that the unit be
mounted upright on a DIN rail such that the thermocouple input connections face
downward. This allows cool air intake to the unit at the bottom vents to pass
through the circuit and exit as warm air at the top, for cooler operation and a more
even heat distribution, which improves the accuracy of its thermocouple cold
junction compensation, overall performance, and helps to extend its operating life.
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