SNAP Analog Output Modules
Description
SNAP I/O analog output modules are part of Opto 22’s SNAP PAC
System. They mount on SNAP PAC racks along with other I/O
modules and a SNAP PAC brain or R-series controller.
These software-configurable output modules handle a wide variety
of signal levels. Most provide dual-channel packaging. All SNAP
analog modules are factory calibrated. Part numbers ending in -FM
are Factory Mutual approved.
SNAP analog output modules have an on-board microprocessor to
provide module-level intelligence, which makes them an ideal
choice for Original Equipment Manufacturers (OEMs). For additional
information about the stand-alone operation of SNAP analog
modules, please refer to the SNAP I/O Module Integration Guide
(Opto 22 form #876).
For specifications and wiring diagrams, see the module descriptions
starting on
Notes for legacy hardware: SNAP analog output modules can
also be used with legacy SNAP Simple, SNAP Ethernet, and SNAP
Ultimate brains and with serial SNAP brains such as the B3000.
These modules can be mounted on SNAP B-series or M-series racks.
Isolation
All SNAP analog output modules are transformer isolated as well as
optically isolated from all other modules and from the I/O processor
(SNAP PAC brain or on-the-rack controller). On most dual-channel
modules, the two channels are not isolated from each other. The
exceptions are the SNAP-AOA-23-iSRC and the SNAP-AOD-29,
which have two isolated channels.
Transformer isolation prevents ground loop currents from flowing
between field devices and causing noise that produces erroneous
readings. Ground loop currents are caused when two grounded
Features
Resolution = 0.004% of nominal range
Rugged packaging
Convenient pluggable wiring
Powered by a single 5-volt supply
Factory calibrated; no user adjustment necessary
Out-of-range indication
Operating temperature 0 °C to 70 °C
Accepts up to 14 AWG wire
page
2. Dimensional drawings begin on
page
10.
Part Numbers
field devices share a connection, and the ground potential at each
device is different.
Optical isolation provides 4,000 volts of transient (4,000 V for 1 ms)
protection for sensitive control electronics from industrial field
signals.
IMPORTANT: Since most SNAP dual-channel analog output
modules provide two single-ended output channels with a
common reference, these dual channels are transformer and
optically isolated from other modules, but not from each other. The
exceptions are the SNAP-AOA-23-iSRC and the SNAP-AOD-29,
which have channel-to-channel isolation.
SNAP-AOA-3
SNAP-AOV-5
SNAP-AOA-23
SNAP-AOA-23-iSRC
SNAP-AOA-23-iSRC-FM*
SNAP-AOV-25
SNAP-AOV-27
SNAP-AOA-28
SNAP-AOD-29
* Factory Mutual approved
Part
SNAP Analog Output Modules
Single-channel current
output, 4–20mA
Single-channel analog volt-
age output, 0 to 10 VDC
Dual-channel analog output,
current loop, 4–20mA
Isolated dual-channel ana-
log output, current loop, 4–
20 mA, with loop sourcing
Dual-channel analog volt-
age output, 0 to 10 VDC
Dual-channel analog volt-
age output, -10 to +10 VDC
Dual-channel analog output,
current loop, 0–20 mA
Dual-channel analog time-
proportional digital output,
5 to 60 VDC
Description
See
pg 2
pg 3
pg 4
pg 5
pg 6
pg 7
pg 8
pg 9
PAGE
1