Emerson MultiFlex RTU, Инструкция по установке и эксплуатации

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The Inputs RTU Input and Output Setup • 11
4.1.3. Wiring Sensors to the
MultiFlex RTU
Wiring an input to the input points on a
MultiFlex board requires three steps:
1. Connect the sensor’s signal wires to the two
terminals of an input point.
2. Set the input type dip switch that
corresponds to the point being connected.
3. If necessary, connect the sensor to one of the
5V or 12V power terminals.
4.1.3.1. Wiring
An input point on a MultiFlex board consists of
two terminals, as shown in Figure 4-2 . One of
these terminals, labeled “SIG,” reads the signal
from the sensor, while the other, labeled “0v” is
where the sensor’s ground and/or cable shield
wire is connected.
4.1.3.2. Sensor Wiring Types
Specific wiring types are required for each type
of sensor used with Einstein or RMCC.
Code
#
Auxiliary Input
Type
Description
1 MIXED AIR Temperature sensor
measuring the temperature
of air from the economizer
mixed with the return air.
2 OUTSIDE AIR Outdoor air temperature
sensor.
3 SPACE 2 A second space temperature
sensor. This sensor’s value
will be combined in some
way with the value of the
SPACE TEMP input to
determine the control
temperature.
4 COMP #3 PROOF If an auxiliary output is
configured to be COOL
STAGE #3, COMP #3
PROOF is the proof
checking device for the
compressor on stage #3.
5 COMP #4 PROOF If an auxiliary output is
configured to be COOL
STAGE #4, COMP #4
PROOF is the proof
checking device for the
compressor on stage #4.
6 OUTSIDE
HUMIDITY (4-20
mA)
An analog outdoor relative
humidity sensor with a 4-20
mA output.
7 INDOOR
HUMIDITY (4-20
mA)
An analog indoor relative
humidity sensor with a 4-20
mA output.
8 OUTSIDE
HUMIDITY (0-5V)
An analog outdoor relative
humidity sensor with a
0-5V output.
9 INDOOR
HUMIDITY (0-5 V)
An analog indoor relative
humidity sensor with a
0-5V output.
10 HUMIDISTAT A digital humidity switch.
11 ENTHALPY
SWITCH
A digital enthalpy switch
used for economization
checking.
12 LIGHT SENSOR A light level sensor.
13 LIGHT SWITCH A digital light level switch.
14 FREEZE STAT A digital temperature
sensor mounted near the
cool stage evaporator, used
to detect coil freezes.
Table 4-2 - Auxiliary Input Types
15 SMOKE STAT A smoke alarm.
16 DIRTY FILTER A digital device that detects
blocked filter conditions.
17 TEMP General temperature sensor.
18 OVERRIDE
SWITCH
An override switch.
19 CO2 SENSOR Carbon dioxide sensor.
Figure 4-2
- Input Board Points
Code
#
Auxiliary Input
Type
Description
Table 4-2 - Auxiliary Input Types