Measurement Computing 6K-SSR-RACK08 - Manual (Page 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).
3-4