SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 2
– INSTALLATION
OMM-0069_0H
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ELECTRICAL WIRING CONNECTIONS Instructions
8. To permit Modbus control of the ECS/SP, refer to Table 2-2, below, and connect the
appropriate wire leads to the Temperature Controller terminals listed. Refer to the
Temperature Controller (Eurotherm 2408) pinouts shown in Figure 2-8 to locate the
required terminals. Also, refer to Appendix A for instructions on how to change the
Temperature Controller Modbus address and for a listing of active Modbus data addresses
for the 2408 Controller. In addition, the Eurotherm documents referenced in this Appendix
provide additional communication information related to Modbus.
NOTE:
The complete wiring diagram for the SmartPlate Electronic Control System is provided in
Appendix B of this Instruction Manual. In addition, the wiring connections for Control Box
Terminal Blocks TB-1 and TB-2 are also provided for reference purposes.
NOTE:
AERCO recommends that shielded, twisted-pair cable be used for communication wiring.
Examples of suitable wiring are: Belden 9841, 8761, 3105A, or equivalent.
TABLE 2-2. Modbus Communication Signal Connections
2408 TEMP. CONTROLLER
COMPUTER CONTROL CABLE
RS232/9-PIN
RS232/25-PIN
RS485
SIGNAL NAME
PIN NO.
SIGNAL NAME
PIN NO.
PIN NO.
PIN NO.
GROUND
HD
GROUND
5
7
GROUND
RECEIVE
HE
TRANSMIT
3
2
A(-)
TRANSMIT
HF
RECEIVE
2
3
B(+)
1A
HA
1B
HB
1C
HC
2A
2B
1D
HE
HF
HD
3B
3D
3C
2D
3A
2C
JD
JF
JE
JB
JC
JA
LA
LB
LC
AA
AB
AC
VI
V+
V-
In1
In2
C
2408 CONTROLLER
L
N
SEE TABLE 2-2 FOR COMM CONNECTIONS
Figure 2-8. Temperature Controller (Eurotherm 2408) Terminal Connection Diagram
