Measurement-computing 6K-SSR-RACK08 Manual do Utilizador descarregar pdf (Página 24)

6K-SSR-RACK08 User's Guide Functional Details

Figure 3-4. SIP resistor location

To pull up the digital line for a particular port, install the resistor with the common line at the HI end. To pull

down a digital line, install the resistor with the common line at the LO end. The SIP establishes a high or low

logic level at each digital I/O line when disconnected from the 6000 Series control board or when the digital

lines on the 6000 Series control board are in high impedance (or input) mode.

When the 6K-SSR-RACK08 is disconnected from the 6000 Series control board or when the digital lines on the

6000 Series control board are in high impedance (or input) mode, the solid state relays are undriven. The state

of the solid state relays when not driven is dependent on the invert/non-invert logic jumper setting and the pull-

up/pull-down resistor configuration. summarizes the undriven state of the SSR output modules for

each configuration.

Table 3-1

Table 3-1. SSR output module power up and reset conditions

I/O type Logic jumper setting Pull-up / down

installed

Power up / reset

state

none high state = on

pull-up high state = on

output invert (logic high)

pull-down high state = off

none low state = on

pull-up low state = off

output non-invert (logic low)

pull-down low state = on

LED states

The LEDs indicate the on/off status of the SSR modules. The LED illuminates when an output module is active

(turned on) or when an input module detects an input voltage (logic high).

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