Curtis 1226 User Manual

2 — INSTALLATION AND WIRING
pg. 7
Return to TOC Curtis Model 1226 – September 2019
Communication Port (J2)
e 4-pin communication connector handles serial communications and the external +14V power
supply. Use a Molex #39-28-8040, mating connector: Molex #39-01-2045 with appropriate 45750
series crimp terminals.
Figure 4
Communication Connector Pins (J2)
Table 4 describes the connector’s pins.
Table 4 J2 Connector
Pin Number Function
J2-1 Serial RX
J2-2 I/O ground
J2-3 Serial TX
J2-4 External +14V power supply
Logic Connector (J3)
e 18-pin logic connector is used for inputs, outputs, and low power drivers. Use a Molex #39-28-
8180, mating connector: Molex #39-01-2185 with appropriate 45750 series crimp terminals.
Figure 5
Logic Connector Pins (J3)
Table 5 describes the logic connector’s pins and their typically used functions. e table also shows
the switch number or analog input number, if any, that is associated with each pin.
Note: Pins J3-4, J3-8, and J3-18 each integrate an LED driver that shows the function’s status when
the input is set as a momentary switch. ese pins can also be used for an external LED driver that
shows the controller’s status and fault codes.

Curtis 1226 Specifications

General

Brand	Curtis
Model	1226
Category	Controller
Language	English