ONICON System-10 MODBUS - Manual (Page 6)

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System-10-MOD Network Interface Installation Guide 05/14 - 0653-10 / 18321
Page 6
CAUTION
Only qualified service personnel should make connections between the System-10 BTU Meter
and the user’s external equipment. ONICON assumes no responsibility for damage caused to
the external equipment as a result of an improper installation.
!
Terminal
T1
Do not connect
shields to this
terminal.
CAUTION
Incoming and outgoing RS485 cable shield wires should be connected together, but must not be
connected to the Btu meter.
!
1.4 NETWORK SIGNAL CONNECTIONS
1.4.1 RS485
MODBUS RS485, 2-wire (half-duplex) serial output connections are connected to terminal
T1 as shown. Do not exceed 4.4 in-lb (0.5 Nm) of torque when tightening.