Racal Instruments 1260-38T, User Manual

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1260-38T User Manual
Installation Instructions 2-2 Racal Instruments © 1998
Module
Installation Installation of the 1260-38T Switching Module into a VXI
mainframe, including the setting of switches SW1-1 through SW1-
4, SW2 and SW3, is described in the Installation section of the
1260 Series VXI Switching Cards Manual. Configuration of
switches SW 1-5 and SW 1-6 is described below.
1260-38 ID Byte
Refer to Section 2 of the Series 1260 VXI Switching Card Manual
for an explanation of Module ID Byte.
The 1260-38T may be configured for two-wire or four wire
switching. The two-wire configuration closes one relay for the
selected channel. Four-wire configuration closes two relays for the
selected channel. Each configuration responds to different sets of
values for <channel number>. The set of values the 1260-38T
responds to is controlled by switch SW1- 5. The switch settings
that correspond to the two configurations are as follows:
Configuration* S1 Switch 5 S1 Switch 6
Two-wire Off Off
Four-wire On Off
The 1260-38T is set at the factory for two-wire configuration.
NOTE
*The software will report the Model Number as “1260-
38A” for the two-wire configuration, or “1260-38B” for
the four-wire configuration.