WebCatalog Numbers 1756-IA16, 1756-IA16I, 1756-IA32, 1756-IB16, 1756-IB16D, 1756-IB16I, 1756-IC16, 1756-IG16, 1756-IH16I, 1756-IM16I, 1756-IN16, 1756-IV16 About This Publication Use this publication when you are upgrading the firmware on your ControlLogix digital input module. IMPORTANT Before you upgrade your module’s firmware, remember: