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Led states, Led states -4, 4 for – Measurement Computing 6K-SSR-RACK08 User Manual

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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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