iWorx® PSU1
12 505-012, Effective: August 10, 2012
© 2012 Taco Electronic Solutions, Inc.
Dip switch pairs must be set properly for each input to operate correctly as shown below:
Figure 6: DIP Switch Settings
NOTE: The dip switches are black boxes with white switches; this drawing is a negative image; the switch
position is shown as black.
Connecting Output Devices
Pump Enable Output (PMP1, PMP2)
The outputs for the Pump Enable must be connected to 24 VAC pilot relays.
• Connect PMP1 (T31) to load. Use TC12 (T30) as common.
• Connect PMP2 (T29) to load. Use TC12 (T30) as common.
Pump Modulated Outputs (MOD1, MOD2)
The modulated outputs can be set to 0-10 V through the control logic. The control signal input of the pump connects to
the 0-10V outputs of the PSU1.
• Connect MOD1 (T37) to load. Use COM (T36) as common.
• Connect MOD2 (T35) to load. Use COM (T36) as common.
Other Connections
Network (LON)
Network wiring must be twisted pair. One network wire must be connected to terminal NETA (T1) and the other network
wire must be connected to terminal NETB (T2). Polarity is not an issue since an FTT-10A network is used for commu-
nications.
Power (PWR)
Connect one output wire from a 24 VAC power supply to PWR (T39) and the other output wire from the power supply to
the adjacent common terminal (T38).
Ground (GND)
Terminal GND (T40) must be connected to earth ground. Failure to properly ground this equipment will
result in improper operation. Improper grounding may also increase the risk of electrical shock, and may
increase the possibility of interference with radio and TV reception.
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