Connecting The Ms/Tp Bus - Johnson Controls TEC2604-4 Installation Instructions Manual

4. Reattach the thermostat controller cover to the
mounting base (top side first).
Terminal
Y1 Energizes on a Call for First-Stage Cooling
Y2
Energizes on a Call for Second-Stage Cooling
G Energizes Fan in Accordance with the Selected Fan Mode
RC 24 VAC from Equipment Transformer
C
24 VAC (Common) from Equipment Transformer
RH 24 VAC for Heating Stages
W1
Energizes on a Call for First-Stage Heating
W2 Energizes on a Call for Second-Stage Heating
Aux Auxiliary Output
DI1
Configurable Digital Input 1
DI2 Configurable Digital Input 2
RS
Remote Room Sensor
Scom Sensor Common
OS
Auxiliary/Outdoor Air Sensor
MS
Remote Monitoring Supply Temperature Sensor
EC
0 to 10 VDC Economizer Actuator Output
+, -, REF
MS/TP Bus
G
Y2 Y1
RC
Cool 1
Cool 2 Fan
24 VAC
Thermostat Power
Figure 5: Wiring the TEC2604-4 or TEC2604-4+PIR Thermostat Controller

Connecting the MS/TP Bus

To connect the MS/TP Bus:
1. Set the MS/TP address of the TEC BACnet MS/TP
Network Series Thermostat Controller per the
engineering drawings and test for bus voltage,
polarity, and isolation prior to wiring the MS/TP
Bus. Use the Com addr parameter to set the MS/
TP address for the thermostat controller.
Note: The wiring rules for the MS/TP Bus differ
from the wiring rules for the N2 Bus. For more
details on wiring the MS/TP Communications Bus,
refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034).
2. Observe the polarity when connecting the bus
wires to the thermostat controller.
4 TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat
Controllers Installation Instructions
Function
RH W1 W2
EC
C
Heat 1 Heat 2
If using the same power source
for the thermostat and heating loads,
install a jumper across RC and RH.
5. Use a Phillips-head screwdriver to reinstall the
security screw on the bottom of the thermostat
controller cover.
Five-Pole
Left Top Connector
Y1
Y2
+
-
Eight-Pole Bottom Connector
REF
EC Aux
Aux Contact (High Side Common)
• Lighting
• On/Off Actuation
• Exhaust Fan
RS Scom
Aux DI1 DI2
Aux
Remote
Room
Air Sensor
Sensor
3. After the bus wires are connected to the first
thermostat controller, continue in a daisy-chained
fashion to the next thermostat controller.
Note: The bus wiring must be twisted-pair lines.
Do not run the bus wiring in the same conduit as
line voltage wiring (30 VAC or above) or other
wiring that switches power to highly inductive loads
(such as contactors, coils, motors, or generators).
Three-Pole
Right Top
Connector
G RC
C
RH W1 W2
DI1 DI2 RS
OS MS
Scom
-
OS +
Supervisory
Controller
Remote
Auxiliary/
Monitoring
Outdoor
Supply
Temperature
Sensor
REF