RTCU MX2 turbo Technical Manual V2.04
Logic IO ApS.
Ph: (+45) 7625 0210
Holmboes Allé 14
Fax: (+45) 7625 0211
8700 Horsens
Page 17 of 36
Email: [email protected]
Denmark
www.logicio.com
1-Wire bus
The 1-Wire bus is available on the X2 connector. All 1-Wire communication goes through a single
connection, and all 1-Wire devices connected to this connection retrieves its power directly from
the bus (called parasitic power). For this only two wires are needed
–
the 1-wire signal and the
ground reference
–
allowing minimal cable installations.
For 1-Wire ID-Button readers, which include a built-in LED, a dedicated output is available for this
purpose. Please consult the RTCU IDE documentation for further information.
For further information regarding modular 1-wire concept,
please refer to the document “Modular
1-W
ire Concept Technical Manual” on the Logic IO webpage.
X2: 12 pin COM connector overview
Pin
Name
Description
1
1Wire
1-Wire bus
7
1W-LED
1-Wire ID-Button LED
2
SGND
Signal Ground
Specification of the 1-Wire bus:
Max.
Unit
Total weight1
65
m
DC-Out
A 3.3V DC output is available on the X2 connector. It is possible to control the output in order to
save power. The output is short circuit- (to ground), ESD- and transient protected. Make sure not
to exceed the current specification of the output and be aware that inrush currents of the external
equipment may exceed the specifications. It is recommended to install a fuse to protect the output.
This output must be enabled from the application. Please consult the RTCU IDE on-line manual for
more information.
X2: 12 pin COM connector overview
Pin
Name
Description
12
DC-Out
+3.3V/150mA DC-Out for external equipment. (Shared with 6 pin
connector)
11
SGND
Signal Ground
1
The term of weight has been described in “Modular 1
-wire concept
–
Technical Manual” document.
