2 — INSTALLATION SPECIFICATIONS AND WIRING
pg. 15
Return to TOC Curtis Model 1351 – December 2018
Note: e drivers’ measure current just before the PWM is shut o; therefore, there is a lower limit
where the current cannot be read. For the low side drivers, this is 8%. For HB drivers (see below) in low-
side mode, this is 12%. e system designer should make sure that the load resistance, voltage supply
and minimum current settings will keep the PWM above these values for good regulation.
e drivers have the pull-in and hold control feature and command ramping in all three active modes.
*The sum of all loads shall not exceed combined Coil Return (pins 11 & 12) current rating of 23 amps.
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