User manual

InRow RC Installation32
Description of user interface connectors
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 33.

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 (APC 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.