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MUX8
8/1 RS-485 Multiplexer
Installation and Specifications:
1. General:
The Multiplexer allows a controller to expand a single communication port to 8 2-wire RS-485 channels,
thus making it convenient to implement star wiring topology. All nine 2-wire channels on the multiplexer
are universal with regard to master/slave devices.
The electrical interface for port 1 is jumper selectable as RS-232 or RS-485.
Ports 2, 4, 6 and 8 may be individually configured as receive-only channel. By pairing a receive-only
channel with another channel, a 4-wire RS-485 channel may be formed.
Baud rate dependent turn around delay is set by DIP switches. The typical turnaround time is set to
approximately 10 bit time (see DIP switch table 2-1). To avoid collision, a device must wait for this time
before it can begin a new transmission.
0.25 [6.35]
2.00 [50.80]
5.00 [127.00]
2.00 [50.80]
0.50 [12.70]
Mercury Security © 2013
2355 MIRA MAR AVE. LONG BEACH, CA 90815-1755, (562)986-9105 FAX (562) 986-9205
JP2
TR+
TXD
TR-
RXD
GND
TB2
+DC
NC
GND
J1
TB1
A
MUX8
This device complies with part 15 of the FCC Rules. Operation
is subject to the following two conditions: (1) This device may
not cause harmful interference, and (2) this device must
accept any interference received, including interference that
may cause undesired operation.
6.00 [152.40]
5.50 [139.70]
JP7
JP5
JP12
JP11
JP14
JP4
JP3
JP8
JP10
JP9
S1
U2
JP13
JP16
JP15
JP17
1
2
3
4
5
6
7
8
9
DOC 10107-0016
REV 2.01
www.mercury-security.com
TR+
TR-
GND
TR+
CHASSIS
TR-
GROUND
GND
TR+
TR-
GND
TR+
Ø0.15 [Ø3.81]
TR-
6 PLACES
GND
TR+
TR-
GND
TR+
TR-
GND
TR+
TR-
CHASSIS
GROUND
GND
TR+
TR-
GND
Page 1
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Table of Contents
Summary of Contents for Mercury Security MUX8
- Page 1 6.00 [152.40] 5.50 [139.70] 0.25 [6.35] JP12 JP11 CHASSIS GROUND JP14 2.00 [50.80] Ø0.15 [Ø3.81] 6 PLACES 5.00 [127.00] JP10 2.00 [50.80] JP13 JP16 CHASSIS JP15 GROUND JP17 0.50 [12.70] Mercury Security © 2013 MUX8 DOC 10107-0016 REV 2.01 Page 1...
- Page 2 4800 BPS (2.50 ms) 9600 BPS (1.25 ms) 19200 BPS / 38400 BPS NORMAL (625 us) 38400 BPS FAST TURN (365 us) 38400 BPS FAST TURN (365 us) Table 2-1 Mercury Security © 2013 MUX8 DOC 10107-0016 REV 2.01 Page 2...
- Page 3 0 to 95 % RHNC Mechanical: Dimension: 5 in. (127 mm) L x 6 in. (15 2mm) W x 1 in. (25 mm) H Weight: 4 oz (180 g) nominal Mercury Security © 2013 MUX8 DOC 10107-0016 REV 2.01 Page 3...
- Page 4 This product is not intended for, nor is rated for operation in life-critical control applications. Mercury Security is not liable under any circumstances for loss or damage caused by or partially caused by the misapplication or malfunction of the product. Mercury Security’s liability does not extend beyond the purchase price of the product.
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