Figure 24. Csm Field Wiring Schematic - McQuay MicroTech II Installation Manual

Figure 24. CSM Field Wiring Schematic

Chilled Water Reset Override
External Start/Stop
Relative Humidity
External Demand Limit
External Chilled Water Reset
Spare
Loop Differential Press
Flow Meter
Decoupler Line Temperature
Outside Air Temperature
Entering Condensor Water Temperature
Leaving Condensor Water Temperature
Chilled Water Return Temperature
Chilled Water Supply Temperature
Ethernet network to PC with Internet Explorer
to run CSM User Interface and/or BAS
P8
B A G
LonCard
MicroTech II MicroTech II
Chiller #1 Chiller #2
CD 112024501
Page 30
Chiller System Manager
CSM Onboard I/O
Inputs
UI16
G
UI15
UI14
G
UI13
- UI12
RH
4-20 mA
+
499 Ω R
G
5
0-10Vdc or 4-20mA
UI11
UI10
5
0-10Vdc or 4-20mA
G
UI9
UI8
DPT 5
2-10Vdc or 4-20mA
G
FM 5
2-10Vdc or 4-20mA
UI7
UI6
G
UI5
UI4
G
UI3
UI2
G
UI1
6
CSM Main Board
Cat 5 Ethernet Cable
P8 P8
B A G B A G
Lon Card Lon Card
MicroTech II
Chiller #3
Onboard
Power
Source
20 Vdc @ 80 mA
DI 4
GND
-----
DI 3
-----
-----
DI 2
-----
AV+
DI 1 GND
-----
-----
AI 12
------
------
AV+
AI 11
Outputs
AI 10
NO8
AI 9
DO 8
C8
NC8
NO7
AI 8
C7
DO 7
NC7
NO6
AI 7
C6
DO 6
NC6
AI 6
NO5
DO 5
C5
NC5
AI 5
NO4
2A @ 24V
DO 4
C4
AI 4
NC4
NO3
2A @ 24V
C3
AI 3
DO 3
NC3
NO2
2A @ 24V
AI 2
DO 2
C2
NC2
NO1
AI 1
2A @ 24V
DO 1
C1
NC1
Transformer
Six
Position
Power
Ethernet Port
Connector
(RJ45)
GRN
X1
Y/G GROUND
CT
GRN
X2
GRN
Battery
EGD
RED
Lon Port
B+ Red
BLK
(Orange) Black
B-
To Additional chillers and/or
remote I/O modules
Notes:
1. Except for the chilled water supply temperature sensor, all
inputs and outputs are optional.
2. Using the LonWorks free topology network means
that "nodes" (chillers and remote I/O modules) can
be configured in bus, ring, star, or a combination of
these three network configurations.
3. LonWorks cable lengths are dependent on singly
or doubly terminated networks. Refer to Echelon's
LonWorks FTT-10A Transceiver User's Guide.
4. Lon network cables to be run in shielding conduit
and must not be run near power wiring.
If a 4-20 mA signal is sent from the sensor, a 499
5.
ohm resister is required across the Analog Input.
6. BACnet IP or BACnet Ethernet BAS interface
standard. Interface to Modbus RTU BAS requires
optional driver.
CSM On/Off
Alarm Output
Alarm Horn
Alarm LED
120 Vac (Model MTII-UC-1-CSM)
or
240 Vac (Model MTII-UC-2-CSM)
50/60 Hz
power source
IM 781-2