1100-2294 Rev 1
22
Each gateway can support a maximum of 15 MVR-300 detectors connected in a daisy
chain fashion using the Modbus network cable. These use a 3-wire cable. Leave no more
than 12 in (30.5 cm) for the single wire tie-off to each MVR-300.
The shield cable may be left floating or tied to electrical GND at the controller only.
3.7 Connecting MVR-300s
Connect the first MVR-
300 detector’s Modbus port (3-wire) to the gateway. The address to
each MVR-300 detector will therefore be a combination of its Modbus ID (number 2 through
16), and the unique IP address of the Gateway to which they are connected.
Additional resources for the MVR-300 VRF Refrigerant Leak Detector are available online. To
download these resources, visit
Special Notes:
The gateway provides the link between the MVR-SC and up to 15 MVR-300
devices.
Cable recommended Belden 3106, 1.5 twisted pair, shielded, or similar.
Daisy-chain only, minimizing the total Modbus run length for best performance.
The best practice is to leave no more than 12-inches (30.5 cm) for the wire tie-off
to each device.
Figure 20 - Wiring the MVR-300
Tip:
An EZ-wire connection is available, perfectly matched to
the Modbus wiring terminal on the MVR-300, which can
ensure faster, more consistent wiring.
Summary of Contents for MVR-SC
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