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132 L4400 User’s Guide
6 L4437A General Purpose Switch
Example: Clearing the cycle count for a relay (all switch modules) The following
command resets the relay cycle count on channels 7 and 16.
DIAGnostic:RELay:CYCLes:CLEar (@1007,1016)
Example: Resetting the Instrument to its power-on state The following
command resets the instrument to its power- on state.
SYSTem:CPON 1
L4437A 32-Channel General Purpose Switch Hardware Description
The L4437A general-purpose switch provides independent control of:
• Twenty-eight Form C (DPST) latching relays rated at 1 A
• Four Form A (SPST) latching relays rated at 5 A. You can set the
power-failure state for these 5 A relays. See page 128 and page 129.
L4437A Simplified Schematic
NOTE
A temperature sensor on these modules triggers system interrupts
when high-carry current-induced heat on the modules reaches a
threshold of 70
o
C.
Channel 001
(1A Form C)
COM
NO
NC
Channel 028
(1A Form C)
COM
NO
NC
COM
Channel 032
(5A Form A)
NO
COM
Channel 029
(5A Form A)
NO