ST-72 User's Manual
Document: UM-1007
Revision Level A
63
standard relays that are provided on the Main I/O Board, but do not need a separate
relay contact for each channel. The Programmable Relay Board is a viable cost effective
option. It gives the flexibility of an additional 16 fully programmable relays.
Each 10-0350 is powered with 24 VDC at TB3 and TB4. Each relay has a LED associated
with it indicating whether the relay is energized. An illuminated LED indicates energized
relays.
TB5 provides an open collector failure detection output. If communication is lost with
the CPU board or if the relay board’s processor fails, the positive terminal of TB5 is
pulled low.
All relays are rated at 5 Amp for 28 VDC and 250 ~VAC
RESISTIVE
loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads) snubber devices must
be installed with inductive loads to prevent RFI noise spikes. Relay wiring should be
kept separate from low level signal wiring.
J3 & J4 are interchangeable I2C connectors
used to add other option PCB assemblies to
the controller.
LEDs indicate relay state.
"ON" = Energized
TB3 & TB4 24VDC
inputs are tied together
making daisy chaining
the options easier.
Figure 3-6
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Содержание ST-72
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Страница 128: ...ST 72 User s Manual Document UM 1007 Revision Level A 122 8 5 3 COPY CHANNELS Figure 8 7...
Страница 129: ...ST 72 User s Manual Document UM 1007 Revision Level A 123 8 5 4 PROGRAMMABLE RELAYS Figure 8 8...
Страница 130: ...ST 72 User s Manual Document UM 1007 Revision Level A 124 8 5 5 SYSTEM CONFIGURATION Figure 8 9...