Johnson Controls EMCOMMS Series Installation Instructions page 3

NETWORK CONNECTIVITY
The EMCOMMS meter is compatible with both BACnet and Modbus networks. The meter is designed to automatically identify
the network baud rate, protocol type, serial formats and self-address for quick startup. Follow the BACnet Network Connectivity or
Modbus Network Connectivity section for the steps required to connect the meter to an existing network.
To manually setup network parameters of the EMCOMMS meter, remove meter from the active network and utilize the EMCOMMS
Series Configuration Tool.
BACNET NETWORK CONNECTIVITY
Once the EMCOMMS meter has been connected to the RS-485
network, it will automatically detect BACnet traffic and and
begin auto-configuration. The meter will detect and match
baud rate and identify an unused MAC address to occupy.
Connect the meter to a BACnet network through the following
steps:
1. Wire the EMCOMMS meter to an existing BACnet network
utilizing the wiring diagrams in Figure 4. EMCOMMS Meter Wiring.
2. Apply power to the meter.
3. Meter will analyze the network traffic for the following
parameters: baud rate, serial format, protocol and available
MAC address. During this configuration, the RS485 LED y
should display approximately 15-30 seconds of blinking activity 4
in yellow while the meter configures itself to the network.

Figure 8: RS485 LED Activity
4. The RS485 LED y will appear green
successfully connected to the network. If the RS485 LED does
not appear green, see Diagnostic Mode (Page 4).
To customize the BACnet address and device ID (along with
other network parameters) reference the EMCOMMS Series
BACnet Protocol Guide document or utilize the EMCOMMS Series
Configuration Tool.
Tip: Customizing the MAC address? Mark the new address
on the EMCOMMS meter label with a permanent marker for a
quick reference point:
WER
Line Device
PRINT
Status Status
D
technology
Figure 9: EMCOMMS Meter Address Label
EMCOMMS
Read instructions
Setup
before installing
C
ORACAL 651 SILVER GREY
Line Status Device
LED Status LED

EMCOMMS
RS485
Status LED
Setup Bu�on
after the meter has

5
address
RS485
Status
Termination
on
o
MODBUS NETWORK CONNECTIVITY
Once the EMCOMMS meter has been connected to the RS-485
network, it will automatically detect Modbus traffic and begin
auto-configuration. The meter will detect and match baud rate,
parity and stop bits. Connect the meter to a Modbus network
through the following steps:
1. Wire the EMCOMMS meter to an existing Modbus network
utilizing the wiring diagrams in Figure 4. EMCOMMS Meter
Wiring.
2. Apply power to the meter.
3. Meter will analyze the network traffic for the following
parameters: baud rate, serial format and protocol. During this
configuration, the RS485 LED y should display approximately
3 15-30 seconds of blinking activity in yellow
configures itself to the network.
Figure 10: RS485 LED Activity
4. The RS485 LED y will appear green
sucessfully connected to the network. If the RS485 LED does
not appear green, see Diagnostic Mode (Page 4).
5. The EMCOMMS meter ships with a default Modubs slave
address. To identify this address, add "100" to the last two digits
of the unique serial number printed on the label:
4
3456
Roland Versaworks Variable Data Printing:
SN 123456
Serial
Figure 11: EMCOMMMS Meter Serial Number
BarCode
The example meter in Figure 11: EMCOMMS Meter Serial Number
would have a default Modbus slave address of 156.
Serial2
To customize the Modbus slave address (along with other
network parameters) reference the EMCOMMS Series Modbus
BarCode2
Protocol Guide document or utilize the EMCOMMS Series
Configuration Tool.
Date
Tip: Customizing the Modbus slave address? Mark the new
address on the EMCOMMS meter label with a permanent
marker for a quick reference point:
P
with
WER
Line
PRINT
Status
technology
Figure 12: EMCOMMS Meter Address Label
EMCOMMS
EMCOMMS Series Meter - Installation Instructions
Read instructions
Setup
before installing
2

REV DATE
0A TBD
Line Status Device
LED Status LED

EMCOMMS
RS485
Status LED
Setup Bu�on
after the meter has

56
+100
156
Courier New, 6 pt, Left align
Code 128, 22 pt, Left aligne
Courier New, 6 pt Bold, Cen
Code 128, 22 pt, Center alig
Myriad Pro Light, 6 pt, Left a
Device
Status
address
RS485
Status
Termination
on
o
while the meter
BY DESCRIPT
DLE Initial Rel
3
Ro
Se
Ba
Se
3
Ba