User Manual 1260-38
Module Operation 3-3
connected to the two-wire high path. When the one-wire channel is
closed, the one-wire common is connected to the two-wire low
path. The same applies to the one-wire common with 1000 series
resistor.
100
Ω
Ω
Ω
Ω
Resistor
Channels
Even-numbered multiplexers have two-wire commons that include
100
Ω
series resistors in both the high and low paths. This may be
useful for applications where transient suppression is of concern.
The resistors are rated at 1/8W. The one-wire relay is also
connected to the two-wire resistor common to provide a one-wire
resistor path.
Front Panel
Connectors
The 1260-38 front panel connectors are labeled J200 and J201.
The connector type is 5 x 32 (160-pin) DIN 41 612 male. The pin
numbering is shown in Figure 3-3.
The mapping of channel numbers to connector pins and the
available mating connector cable is given in Table 3-1.
Mating
Connectors
There are no mating connectors shipped with the 1260-38 module.
Racal Instruments offers the following accessories for mating
connectors (see ordering information for part numbers):
-
160-Pin Connector Kit with
backshell and pins
-
160-Pin Cable Assy,
6ft, 240A
-
160-Pin Cable Assy,
l2ft, 24GA
The 160-Pin Connector kit consists of a connector housing,
customized backshell and 170 crimp pins. The backshell design
has been optimized for system integration. The connector kit has
been designed for 22 to 26 gauge cable. The crimp pin will lock or
'click' into the connector housing only when installed correctly. The
assembler should ensure that the crimp pin is locked by tugging
on the cable after insertion.
The hand crimp tool for loose crimp contacts is Erni Part Number
014 374. The disassembly tool is Erni Part Number 471 555.
The cable assemblies (optional lengths of 6ft. or 12ft.) use the
160-Pin Connector kit along with two 80-wire multi-colored 24
gauge cables. One end is un-terminated. Refer to Table 3.1 for the
mapping of channels to connector and cable.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
