The RS485HUB, 4-Port RS485 REPEATER/HUB with RS232 PORT:

General Description:

The RS485HUB is a 4-port automatic RS485 hub repeater (non-isolated) with an RS232 port. The unit can be used to expand RS485 serial communications networks by increasing the maximum distance and/or number of nodes on a network. Larger networks can be implemented by cascading units. This repeater is a true port-to-port repeater (any data received at one port is transmitted to the remaining ports). Each port has its own LED indicators, termination jumper and an RXEN (receive enable) jumper. Bias is fixed with 620 Ohms of pull-up and pull-down resistance to hold the data lines in a known state when the data lines are inactive. The built in RS232 port allows easy connection to a PC. Each RS485 port on the RS485HUB hub will support up to 32 full-load RS485 devices. Additional units/nodes can be added, using 1/2(64 units) and 1/4(128 units) load devices. The SN65LBC184 transceiver IC, employed in the RS485HUB, is a 1/4 load device, has built-in transient protection and is slew rate limited to 250 Kbps. The operating temperature range is -40C to +85C.

Download:
	MHUBX8manual.pdf	Multi-repeater manual
	RS485HUB.pdf	Multi-repeater schematic
	RS485HCD.pdf	Multi-repeater physical drawing

	"Let me spin a very large RS485 network for you!"