The MOSCAD-L Mixed Input/Output (I/O) modules provide a combination of features that satisfy the needs of many smaller sites. The modules provides eight wet digital inputs that may be used as low-speed counters under application control. An isolated 24 Vdc wetting voltage is provided so the open/closed state of dry-contact sensors may be determined. Each of the inputs are opto-isolated from the remaining circuitry on the modules to provide the highest possible input surge immunity. There are two 4-20 mA analog inputs. Each of the inputs, plus ground, are opto-switched into a precision A-to-D converter; ground is measured so short-term drift may be canceled. Simply put, there are 4000 steps over the total ±20 mA range with 40% (1600 steps) of the total range in active use. The 24 Vdc wetting voltage may be used to power the analog loops provided that isolation between the DI, AI, and AO circuits is not required. Two relay outputs, each with Form A contacts, are also provided. The FRN5820 option provides a module with two magnetically-latched relays whereas the FRN5819 option provides a module with two electrically-energized relays. Internal feedback from each relay is available so the application may determine the state of the relays. Both modules utilize plug-in screw terminals for connection of the associated wires. |
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| Mixed I/O Module: 4-20 mA 2EE FRN5819 | | | Mixed I/O Module: 4-20 mA 2ML FRN5820 | ||
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