ULDIFI - Digital Input Field Interface Module with LED Indication & fuse Protection (Non Redundant)
ULDIFR - Digital Input Field Interface Module with Relay (Non-redundant)
ULDIFO - Digital Input Field Interface Module with OptoIsolation (Non Redundant)
ULDIFAR - Digital Input Field Interface Module with Autotest & Redundancy
ULDIFIRED - Digital Input Field Interface Module with LED Indication & Fuse Protection (Redundant)
ULDIFRRED - Digital Input Field Interface Module with Relay (Redundant)
ULDIFORED - Digital Input Field Interface Module with OptoIsolation (Redundant)