Specifications

990-4618C-001 InRow Chilled Water Air Conditioners Technical Specifications 27
User interface connection
NOTE: For a top installation, control wiring is routed through the wire channel located at the top-left corner
just above the user interface connectors.
NOTE: For a bottom installation, the control wiring is routed to the access hole in the bottom of the equipment
through wire clamps from the interface connectors. Then, the wiring is routed down along the electrical panel
and secured with wire clamps.
Item Description Item Description

Rack inlet temperature sensors 1, 2, 3

Supply 24 V DC (current limit: 20 mA)

A-Link IN

Customer input + (12–30 V AC/V DC, 24 V DC @ 11
mA)

A-Link OUT

Customer input - (12–30 V AC/V DC, 24 V DC @ 11 mA)

Network port

Modbus D1

Console port

Modbus D0

Customer output, NC (Normally
Closed)

Modbus GND

Customer output, COM (Common)

Supply air temperature sensor (front)

Customer output, NO (Normally
Open)

Supply air humidity sensor (front) (ACRP500 series only)

Supply GND (Ground)

Display interface

Supply 12 V DC (current limit: 20
mA)