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8
By using the RM3545-02 in combination with the Z3003 Multiplexer Unit, it is possible to
conduct measurements by switching among up to 20 locations (4-wire) or up to 42 locations
(2-wire).
When installing the multiplexer unit, be sure to read "2.4 Installing the Multiplexer
Unit"(p.42).
• The Z3003 Multiplexer Unit’s contacts use mechanical relays. Since mechanical relays
have a finite service life, programs should be created so as to minimize the switching of
contacts.
Contact service life reference value
4-wire: 50 million cycles, 2-wire: 5 million cycles
• The self-test function performs short and open tests. Short test measures each pin’s
round-trip wiring resistance in the 2-terminal resistance measurement state and gener-
ates a PASS result if the value is 1 or less. When using a measurement current of 1 A,
it may not be possible to conduct measurement due to an inability to achieve the 1 A
measurement current, even if the self-test yields a PASS result. If you encounter a cur-
rent fault (
------- or OvrRng display), reduce the wiring resistance and the contact resis-
tance between the measurement target and measurement leads. (p.57)
Multiplexer Chapter 8
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