Sierra Instruments Instruction Manual
Smart-Trak
®
2 Series 100
19
Instrument Power:
The Smart-Trak 2 requires a 15-24 VDC power supply. If you are using the power
supply supplied by Sierra, connect it to the 15-pin HD DB-15 connector on the side of
the instrument. If you are supplying your own power source, it must be a regulated
15-24 VDC with ripple not to exceed 100 mV peak-to-peak. It must be capable of
producing the current specified for the appropriate voltage shown in Figure 2-5: Power
Supply Requirements. Apply power as follows: positive (+) to the green (pin 6) and
negative (-) to the yellow (pin 5) wires. The instrument is polarity sensitive. If you
reverse this wiring, the instrument will not be damaged, but it will not function.
Instrument Grounding:
The Smart-Trak 2 has very high levels of RFI and EMI shielding built into the metal
electronics cover (meets or exceeds the CE Standard EN 61326-1; 2006). To maintain
the integrity of this CE rating, it is critical that a path be provided for any residual
internal noise to exit the instrument or it may register on the outputs. Grounding
provides this path.
To properly ground your instrument, secure the chassis to solid earth ground using the
mounting holes on the bottom of the flow body. If the instrument will be used without
permanent mounting (on a laboratory bench, for instance) then, using the provided
cable, connect the shield wire (no insulation) to earth ground in your facility. If you
purchased a Sierra power supply, a ground wire is provided for your convenience.
Figure 2-5: Power Supply Requirements
Instrument Type
Recommended Input
Voltage
Minimum Current
Required (mA)
M100L Meter
15-24 VDC (+ 10%)
230
M100M Meter
15-24 VDC (
+
10%)
230
M100H Meter
15-24 VDC (
+
10%)
230
C100L Controller
24 + 10% VDC
500
C100M Controller
24 + 10% VDC
800
C100H Controller
24 + 10% VDC
1260
NOTE:
The Compod™ adds an additional 100mA to the ST2 current ratings
.
CAUTION: This instrument is not a loop-powered device! Do NOT apply power
to the 4-20 mA output or input connections.