Watlow RMA PLUS RMAP-2A Series, User Manual

Page: 37 / 75

Version 1.0 PN: 2042-8198
Page 37 of 75 DN: 10-32813
USB Host (USBH)
NOTE: This is a future option.
It has the following features:
•
Connector: Standard Type-A receptacle
•
Configuration: Standard Downstream Port (SDP)
•
Full-Speed USB Host (USBH)
o
Mass Storage Class (MSC) via (msc:) volume
o
Android ™ Open Accessory (AOA)
Bluetooth® Low Energy (BLE)
NOTE: This is a future option.
Wi-Fi
NOTE: This is a future option.
Ethernet
The RMA PLUS embeds a 3-Port 10/100 Managed Ethernet switch. Therefore, you do not need a switch
or router to create a simple network of devices. You may connect your PC directly to the RMA PLUS on
either port. The other port can connect to another device (HMI, PC, RMA PLUS, etc.).
3-Port 10/100 Managed Ethernet Switch
Setup keys: SnifferPort
The RMA PLUS embeds a 3-Port 10/100 Managed Ethernet switch. It maintains a 100 Mbps, full duplex
connection to port 3 of the switch (internal connection). Ports 1 and 2 are for user connections.
IMPORTANT: The embedded switch will reset along with the RMA PLUS breaking connection to
downstream device(s). Therefore, carefully consider whether to daisy-chain the Ethernet connection in
your system or make the RMA PLUS a drop, leaving one port open for diagnostics.
Notable Features:
•
MDI/MDI-X Auto Crossover
•
Auto-Negotiation (Speed and Duplex) (ports 1 and 2)
•
Broadcast Storm Protection (all ports)
•
Multicast Storm Protection (all ports)
•
Port Mirroring (see SnifferPort )
Broadcast Storm Protection
The embedded switch in the RMA PLUS has an intelligent option to protect the switch from receiving too
many broadcast packets. As broadcast packets are forwarded to all ports except the source port, an
excessive number of switch resources (bandwidth and available space in transmit queues) may be
utilized. Broadcast packets in excess of the preset storm rate will be dropped protecting both the switch
and attached devices, namely the RMA PLUS.
Without storm protection, all broadcast packets would be received by the other switch ports (and RMA
PLUS) consuming valuable resources.