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The default digital input (DX) connections are as follows:
• D1—pump 1 (M150 runtime accumulator, M850 status and runtime accumulator)
• D2—pump 2 (M150 runtime accumulator, M850 status and runtime accumulator)
• D3—pump 3 runtime or simultaneous pump (1 and 2) runtime accumulator
*(M150)
• D4—high level float
• D5—pump 1 fail
• D6—pump 2 fail
• D7—phase fail
• D8—unassigned or multiple pump runtime accumulator
*(M850)
MyDro Digital Inputs feature software selectable input characteristics including:
• Dry contacts with wire fault supervision (requires 1000 ohm EOL resistors)
• Dry contacts no wire fault supervision (NF)
• Strap on current sensing switches (Mission PN OP400) with wire fault supervision
• Strap on current sensing switches (Mission PN OP400) without wire fault supervision
Note:
The MyDro does not directly support the Wet Well Module. See the technical
document, Wet Well Module with MyDro, if replacing M110 or M800 with Wet Well
Module to MyDro.
Warning:
Digital inputs require dry contacts. This means that wires running to
these inputs must not supply any voltage. Use an interposing relay if there are no
dry contacts available.
The digital inputs are set as normally open (N/O) by default. You must use N/O contacts
on pump runtime inputs. You may use either N/O or normally closed N/C contacts on
digital inputs 4 through 8. Notify Mission Technical Support (or indicate on RTU setup
form) to change the default settings (refer to Figure 2).Connect the shields of digital input
wires to the grounding lug located inside the RTU.
Pump Runtime Inputs: On M150 RTUs, only inputs D1–D3 can be configured for pump
runtimes. However, they can also be set as alarm inputs. D4–D8 on an M150 can only
be configured as alarm inputs.
D3*
can be used for simultaneous runtimes by configuring
digital input on touch screen.
On M850 RTUs, D1–D8 (on the main board) can be configured as pump runtime, pump
runtime with alarm, or alarm inputs. As an option, the system can report multiple pump
runtimes on M850 RTUs on
D8.*
