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Modbus Organization

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Acromag

904MB Discrete Input Module

Type:  I/O Module
Description:  12 discrete input channels - active high
Connectivity:  Modbus
Features:  Standard RS-485 Modbus-RTU communication; Easy PC configuration; 115Kbps max baud rate; Compact 1"-wide DIN-rail mounting; Pluggable terminals; Low power; Self-diagnostics w/LED indication; -25 to 70C wide operating range; Approvals for CE, UL, cUL, CL1 Div 2 Groups ABCD.
Specifications:  12 active-high, buffered inputs with a common connection; 0 - 35V DC input range (TTL-compatible); 100K ohm input impedance; Built-in 5.6K ohm socketed pull-down resistors at each 4-channel port; 10 - 36V DC or 24V AC power requirement; 1500V AC 3-way isolation (inputs, network, and power); 904MB Spec. Sheet