If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. Emerson KJ3221X1-BK1 12P4704X042 8-Channel 4-20 mA HART Card Reliable Multi-Channel Analog Output for Industrial Control The Emerson KJ3221X1-BK1 12P4704X042 is an 8-channel analog output module designed to deliver precise 4–20 mA HART signals within DeltaV™ distributed control systems. Engineere *Your Name: *Your Email: *Your Name: *Vdcode: Submit