How To Power Up A NEMA Monitor Without A Cabinet

General Overview

The following is the instructions on how to make a Signal Monitor Bench Test Power Cable

Parts needed: Amphenol A71-627118-55P-ND

DB-15 male connector

Power cord

Wire and wire nuts

1.Take the Amphenol A71-627118-55P-ND and solder the power cord to the pins shown in Table 1

If you want a Type 2 cabinet (16-phase) tie pin HH to Logic Ground, if not tied to LG the monitor will be a Type 1 (12 Channel)

2. Solder a wire to each pin shown in Table 2 and wire nut them together. This applies a logic TRUE (low) state to this input of the +24V Monitor Inhibit, Controller Voltage Monitor, and Type Select. If you do not apply a logic TRUE (low) state to these inputs the monitor will go to a failed state.

Once you complete Step 1 and 2 you will be able to power up the monitor.

The monitor will show a PORT 1 FAIL and no field status will be shown on the 2 lower liquid crystal displays (R Y G), however, you will be able to go thru the Status and Menu Screens. To override the PORT 1 FAIL, see next step

3. Take the DB-15 male connector and solder a jumper wire to pins 2 and 10.

Once you complete Step 3, put this DB15 into the PORT 1 SDLC of the monitor and reset the monitor. The Port 1 Fail and Fault Led will clear.