Max Machinery 121 INDICATOR - Manual (Page 32)

Pg 32 121-000-350 © 2001 Max Machinery, Inc.
RELAY NOTES & CONSIDERATIONS
1. Relay activation is based on the computed readings not the displayed value. Therefore the display
damping factor will not affect the relay response time. The RELAY DELAY feature allows the
user to enter a time delay for relay activation. This feature is very useful in applications where
short over/under range conditions are not considered alarm conditions.
2. When INSTRUMENT TYPE is set to batcher, Relay 1 is reserved for PRESET and Relay 2 is
reserved for PREWARN. (the Prewarn value is relative to the Preset value. Input the
number of units that Relay 2 should “drop out” in advance of Relay 1.)
3. Setting the relays to NA (Not Assigned), will allow the relay activation to be controlled via the
RS-232 Serial ports.