The manual explicitly warns against this due to slight timing differences that cause one relay to bear full current. Use an external interposing relay instead.
Reversing trigger and reset pins. The manual explicitly states that trigger overrides reset only when the device is in "Continuous Cycle" mode. mt3021 manual
Let me know which or model number you're currently working with! 3021 Data Sheet - EM Microelectronic The manual explicitly warns against this due to
: Rated for continuous operation between -40°C to +70°C, with hardware LCD display constraints bounding readouts to -20°C to +60°C. mt3021 manual
: Select the target expansion controller instance and manually adjust the valve step position parameter from 0 steps (fully sealed) to 480/500 steps (wide open) depending on the valve's physical specifications.