ADLINK ND-6067 - Manual (Page 86)

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5.3 Overview of ND-6053
ND-6053 provides 16 digital input channels for dry contact or wet contact
signals. The effective distance from DI to contact point is up to 500 meter for
dry contact input.
5.3.1 Features of ND-6053
z 16 bits digital input
z Programmable host watchdog timer for host failure protection
z Internal watchdog timer for device failure protection
z Easy programming by software
z Easy installation and wiring
5.3.2 Specifications of ND-6053
‹ Interface
♦
Interface : RS-485, 2 wires
♦
Speed (bps) : 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K,
115.2K
‹ Input
♦
Channel numbers : 16
♦
Dry Contact:
♦
Logical level 0 : close to GND
♦
Logical level 1 : open
♦
Wet Contact :
♦
Switching Level :TTL
♦
Maximum current sink : 50mA
‹ Watchdog Function
♦
Module internal watchdog timer : 150ms
♦
Power failure threshold : 4.65 V
♦
Host programmable watchdog : 100 ms ~ 25.5 sec
‹ Power
♦
Power supply : +10V to +30V
♦
Current consumption : 0.408 W