The mating connector for J4 is a 4-pin Molex Mini-fit Jr. or equivalent. Either
an external Status LED or a Curtis programmer can be connected to J4. The
pinout is as follows.
2 — INSTALLATION & WIRING: Connections
Table 3 J4 Connector Pinout
PIN PROGRAMMER STATUS LED
J4-1 Data input from programmer (Rx). Status LED enable.
J4-2 Ground. Ground.
J4-3 Data output to programmer (Tx). Status LED output.
J4-4 +15 V. +15 V.
31
4
2
J4
Note: When J4 is used for a Status LED, a jumper must be added between
pins J4-1 and J4-4 as shown in the basic wiring diagram (Figure 3).
6
Curtis 1204M/1205M/1209M/1221M Manual
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