Precision Digital PD6400 - Manual (Page 26)

Model PD6400 High Voltage & Current Meter Instruction Manual
26
External Relay, Analog Output, & Digital I/O Connections
The relay, analog out, and digital I/O expansion modules PDA1004,
PDA1011, and PDA1044 are connected to the meter using a CAT5
cable provided with each module. The two RJ45 connectors on the
expansion modules are identical and interchangeable; they are used to
connect additional modules to the system.
Note: The jumper located between the RJ45 connectors of the
PDA1044 must be removed on the second digital I/O module in
order for the system to recognize it as module #2.
Warning!
Do not connect or disconnect the expansion modules
with the power on!
More detailed instructions are provided with each
optional expansion module.
Interlock Relay Feature
As the name implies, the interlock relay feature reassigns one, or more,
alarm/control relays for use as interlock relay(s). Interlock contact(s) are
wired to digital input(s) and trigger the interlock relay. This feature is
enabled by configuring the relay, and relative digital input(s) (see page
60). In one example, dry interlock contacts are connected in series to
one digital input which will be used to force on (energize) the assigned
interlock power relay when all interlock contacts are closed (safe). The
interlock relay front panel LED flashes when locked out. The interlock
relay would be wired in-series with the load (N/O contact). See below.
Figure 21. Interlock Connections