The 9470/25 series digital input module for Zone 2 has 16 channels for operating zero-potential contacts or NAMUR proximity sensors. Two channels can also be configured for frequency measurements or as a pulse counter for frequencies of up to 20 kHz. All inputs are short-circuit proof, galvanically separated from the system and individually monitored to check for wire breakage/short-circuiting.
- Sixteen channels for contacts and NAMUR proximity sensors – can also be used for frequencies
- Ex nA inputs with line fault monitoring
- module in Zone 2 can be hot swapped