ADS Environmental Services IETG FlowHawk QR 775012 A4 - Manual (Page 167)

Communication 4-49
Connecting the RTU to the EMUX
Connect the RTU to the MODBUS port (male pins) on the EMUX
using a customer-supplied serial cable with a female DB-9
connector configured to an RS-232 connection specification. It also
must support 8 data bits, 1 stop bit, no parity. Refer to the
following figure to ensure proper wiring to the port:
Wiring diagram for MODBUS port on the EMUX
Providing External Power to the EMUX
After mounting the EMUX and hooking up the wireless antenna,
connect the cable coming from the external DC power source to the
EMUX in the following way:
1. Remove the orange 4-plug connector seated in the 4-pin port on
the top of the EMUX.
2. Wire the customer-supplied power cable running from the
external power supply to the orange 4-plug connector.
Terminate the 2 wires from cable and the wire from earth
ground into the appropriate terminals on the orange connector
using a 1/8-inch (3-mm) flat screwdriver. Make sure the
screws are tight.