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Introduction
3.5 Interface connectors
Interface connectors are located on the left side of the controller housing.
The sampler comes standard with four interface receptacles:
• 12 VDC (Power Input)
• Auxiliary (Multi-purpose input/output port)
• RS232 (Serial communications port)
• Thermal (Control port for heating and cooling system)
In addition, the sampler can be used with a wide variety of optional devices including
level and flow sensors, rain gauge, pH/ORP, D.O., temperature, conductivity, Modem,
4–20 mA current loop, and three additional analog inputs of 4–20 mA or -4.0 VDC to
+4.0 VDC.
Note: All mains powered equipment that connects to the controller terminals must be NRTL listed.
Figure 3 Door latch
1 Lock nut 2 Door tension adjustment screw
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
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