Liebert EM manual Connectors on Back of Unit, Rear view, Description of indicators and connectors

Introduction

1.1.3Connectors on Back of Unit

The back of the OpenComms EM, shown in Figure 2, has an input power source, sensor ports, a modem port and an Ethernet port. The EM PDU and vEM-14 controllers have serial ports, and vEM-14 controllers also have 10 dry contact inputs.

Figure 2 Rear view

		Sensor	Sensor	Modem Ethernet DCN
EM	2		1
CONTROLLER

F - Power

EM PDU CONTROLLER

					D - Serial
B - Sensors		C - Modem						E - Ethernet
					devices
DCN	Sensor	Sensor	Modem	Serial		Serial	Ethernet
	2	1		2	1

F - Power

vEM-14

CONTROLLER

B - Sensors C - Modem D - Serial E - Ethernet devices

G - Dry contact inputs

F - Power

Table 1	Description of indicators and connectors
Item		Description		For more information, see:
A - Power and		Indicators on the front of the unit show the status of input power	1.2:	Indicators
port indicators		and other connections (see Figure 1).
		Sensor ports to connect compatible sensors:
		• Temperature sensor
B - Sensors		(provided with TMNET & TMPDUNET kits)	2.3.4: Connect Sensors
		• Temperature & humidity combination sensor
			5.3:	Sensors Window
		(provided with THCMNET & THCMPDUNET kits)
		• Humidity, water detection or dry-contact sensor
		(available separately)
C - Modem		Port for connection to a modem.	2.3.3: Connect to a Modem
		• Requires RJ45 cable (customer-supplied)
			2.3.5: Connect Serial Devices
D - Serial		Serial 1 and Serial 2 ports to connect serial devices		(EM PDU/vEM-14 Controllers)
		(EM PDU and vEM-14 controllers).	5.4:	Power Window (EM PDU &
devices
		• Requires serial cable (one provided)		vEM-14 Controllers)
			5.7.4: Serial Ports
E - Ethernet		Port for connection to an Ethernet network.	2.3.2: Connect to an Ethernet Network
		• Requires RJ45 cable (customer-supplied)	5.7.1: Network Connectivity
F - Power		Power connection for the OpenComms EM.	2.3.1: Connect Power to the Unit
		• Requires 9VDC
G - Dry		10 dry contact inputs for auxiliary devices (vEM-14 controller).		—
contact inputs		• Requires Form C dry contacts

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