Installation manual

InRow RC Installation Manual34
Description of user interface connectors
Rack temperature sensors
The rack temperature sensors control the unit airflow and ensure adequate supply
of cooling air to the server racks in the data center.
The unit is supplied with three external rack temperature sensors. These sensors,
along with wire clamps and wire clips, are included in the installation kit supplied
with the unit in a separate box.
Item Description

Rack temperature sensors 1, 2, 3 Three temperature sensors which must be installed on
the cold aisle side of the server racks. See “Rack
temperature sensors” on page 34.

A-Link IN In and out connections for A-Link. The terminators
supplied with the equipment must be plugged into the
first A-link port and the final A-Link port for the group.

A-Link OUT

Network port 10/100 Base-T Network port. Connects the equipment
to the network; Status and Link LEDs indicate network
traffic.
• Status LED—blinks orange and green at start-up;
indicates the status of the network connection (solid
green—IP address established; blinking green—
attempting to obtain an IP address).
• Link LED—blinks to indicate network traffic (green—
operating at 10 mbps; orange—operating at 100 mbps).

Console port RS-232 communication port used for local service
access to the equipment. Use configuration cable
(Schneider Electric part number 940-0103) to connect
to this port.

Customer output, Normally Closed (NC) Customer-configurable output relay which can be
activated for all types of alarms or critical alarms. The
relay can be connected to external equipment using 30
VAC/DC, 2 A.

Customer output, Common (COM)

Customer output, Normally Open (NO)

Supply GND Can be used for customer input and output interface.

Supply 12 Vdc Can be used for customer input and output interface.
Current limit is 20 mA.

Supply 24 Vdc Can be used for customer input and output interface.
Current limit is 20 mA.

Customer input + Used for remote shutdown of the InRow RC. Voltage is
applied from the internal power supply or by using an
external power supply.

Supply COM- Ground connection point for remote shutdown supply
source.

Modbus D1 (RXTX+) Connections for Building Management System. Wire a
150-Ohm terminator resistor (supplied) into the final
InRow RC, between Modbus D0 and Modbus D1.

Modbus D0 (RXTS–)

Modbus GND

Supply air temperature sensor (front) Temperature sensor installed on the front of the
equipment.

Supply air humidity sensor (front) Humidity sensor installed on the front of the equipment.

Display interface Connection for the display interface installed on the
front door of the equipment.