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Inputs & Outputs
Output Signals
Thermo Fisher Scientific
The characteristics of the input and output options for the gauge are
summarized in the following table.
Table 1–1.
Type
Characteristics
Transmitter
DC power:
input power
Standard: 12 Vdc (9–15 V), 15 W
Optional: 24 Vdc (20–28 V), 12 W
AC power:
Optional: 115/230 Vac (100–240 V),
50/60 Hz, 25 VA
Current output
3.8–20.5 mA DC (adjustable operating
range)
Standard configuration:
- Isolated, self-powered, 700 ohm
max. load
Alternate optional configuration:
- Isolated, loop-powered (user-
supplied 24 Vdc loop power input),
700 ohm max. load
Serial
RS232: 1 terminal block
communications
Current input
4–20 mA DC current input
Relays
Two relays optionally available on each
I/O board
Form C SPDT, isolated, 8 A, 220 Vac
Display
4-line, backlit LCD
You can assign measurements to the 4–20 mA current output or have the
measurement values sent to a remote terminal or host computer as serial
data. One current output is provided on the standard I/O board, and two
additional current outputs are available (one per I/O board).
Two optional relay outputs can be provided on each I/O board.
Note If the detector will be connected directly to customer equipment (i.e. the
SGD-O transmitter will not be used), the detector output is 0 to 10 Vdc.
Product Overview
Inputs & Outputs
Comments
Default range is 4–20 mA dc.
One current output standard.
Maximum of two additional
current outputs.
Configure as loop-powered by
removing a jumper.
Full duplex communication
with remote terminal or PC.
Maximum of 6 relays. Process
alarms can be assigned to
control relays.
English language setup menus.
SGD-O User Guide
1-5
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