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7.14 HMX440 RELAY OUTPUT MODULE
The HMX440 relay-contact output module is a general-purpose eight (8) output circuit
card, developed for use in the MAXPRO-Net I/O subrack equipment. Each output circuit
provides one normally open relay contact closure. All output circuits are isolated from
each other.
An output circuit on the HMX440 module is a normally open RELAY CONTACT. The
relay contact is completely floating with respect to earth.
An output circuit will tolerate an applied open-circuit voltage of 50 volts and a closed-
circuit loop current not exceeding 0.6 amps. As it is a true switch contact the HMX440 is
suitable for switching AC supplies. As all eight output circuits are isolated from each
other, different polarity and/or reference supply rails can be used for each output circuit
on the one MX- 440 module.
Eight LED indicators are located on the front edge of the HMX440 module. Each LED
shows the current status of its respective output circuit. The top LED corresponds to the
first output circuit.
LK1
LK1 is used to determine whether the relay outputs are energized "constantly" ("C"
position), or "pulsed" ("P" position). Although programmed to activate, if LK1 is in the
"P" position the output will energize momentarily. When in the "C" position, the output
will energize until programmed to by the MAXPRO-Net to de-energize.
RV1
RV1 is used to determine the energized period of the outputs when using the "pulse"
mode via LK1. The time variable is approximately 0.2second minimum, to approximately
1 second maximum.
Rev. C
7.14-1
HMXMU001018
10/06
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