Measurement-computing USB-SSR08 Manuel d'utilisateur télécharger pdf (Page 12)

USB-SSR08 User's Guide Installing the USB-SSR08

Remove from the enclosure to access the on-board switches

To change the configuration of a switch, you must first remove the USB-SSR08 from the enclosure. Turn

external power off before changing the switch settings

I/O module type

Configure switch

S1 to set the type of each module group for input or output. By default switch S1 is shipped

with all modules configured for output, as shown in . Figure 2-2

Figure 2-2. I/O module type switch (S1)

OUTIN

You cannot mix input and output modules within a group.

Control logic polarity

Configure switch

S2 to set the control logic polarity for each module group for inverted (active high) or non-

inverted (active low, default) logic. By default, this switch is shipped with all banks configured for non-inverted

logic, as shown in Fi . gure 2-3

Figure 2-3. Relay logic switch (S2)

INVERT

NON

INVERT

 For input modules, invert mode returns a "1" when the modules are active. Non-invert mode returns a "0"

when the modules are active.

 For output modules,

invert mode allows you to write a "1" to activate the module. Non-invert mode allows

you to write a "0" to activate the module.

Relay power-up state

Configure switch

S3 to set the state of the output relays at power-up. By default, this product is shipped with the

switch for all banks configured for pull-up (modules inactive on power-up), as shown in . When

switched to

P/DN (pull-down), modules are active on power-up. Switch settings can be read back via software.

Figure 2-4

Figure 2-4. Relay power-up state switch (S3)

P/DNP/UP

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Measurement-computing USB-SSR08 Manuel d'utilisateur Page 12