Aerco Modulex E8 Controller (and BCM) For Modulex EXT Bo Manual de usuario descargar pdf (Pagina 86)

E8 Controller and BCM for Modulex EXT

Installation, Operation & Maintenance Manual

CHAPTER 8: BOILER COMMUNICATION MODULE (BCM)

Page 86 of 108 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0093_0A

PRI: 06/24/2013 Phone: 800-526-0288 GF-136-C

8.7 Modbus Network Wiring Diagram

A “Sample” Modbus Network wiring diagram for an AERCO BMS II/ACS Master controlling BCM

Slaves is shown in Figure 8-10. Activate the terminating resistor in the last BCM on the daisy-

chain loop. DO NOT install the 1K bias resistor. Instead, activate the two bias DIP switches in

the BMS II/ACS. Refer to GF-124 for the location of these switches.

CAUTION!

It is imperative that polarity be maintained between all Modbus

Network connections. The Network will not operate if the proper

polarity is not maintained. Also, twisted-pair wiring shields should

only be terminated at the controlling Master for the Modbus

Network.

TO OTHER NETWORK

BOILER SLAVES (3 - 9)

AERCO BMS II

MASTER

485 B +

485 A -

RS485 PORT

SHLD

(TERM 3)

Y2-2 – MODBUS “A” (-)

(PART OF BCM CONN. Y2)

MODULEX BOILER SLAVE #1

NOTES:

THE LAST BCM SLAVE ON THE RS485 LOOP

MUST HAVE ITS TERMINATION RESISTOR

ENABLED.

ALSO, THE 2 BIAS DIP SWITCHES IN THE BMS II

SHOULD BE TURNED ON,

Y2-1 – MODBUS “B” (+)

BCM

Y2-2 – MODBUS “A” (-)

(PART OF BCM CONN. Y2)

MODULEX BOILER SLAVE #2

Y2-1 – MODBUS “B” (+)

BCM

RS232 PORT

BIAS DIP

SWITCHES (2)

SET BOTH

SWITCHES TO “ON”

Figure 7-10. AERCO BMS II Master Controlling Modulex Boiler Slaves

Figure 8-10: AERCO BMS II Master Controlling Modulex Boiler Slaves

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 107 108

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Aerco Modulex E8 Controller (and BCM) For Modulex EXT Bo Manual de usuario Pagina 86

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