Emerson Battery Testing and Replacement, 5 E2 RS485 Port Card P/N 537-4890, LEDs

E2 Power Interface Board (PIB)	Input and Output Wiring
				NORMALLY
				OPEN
				NORMALLY
				CLOSED
E2 Plug-In
Digital I/O	COM 1 COM 2
Network Card	#1	#2	INPUT #1	INPUT #2
	OUTPUT	OUTPUT

Figure 4-7- E2 Digital I/O Network Card Install and Wiring

4.3.4.1LEDs

The plug-in Digital I/O Network card LEDs can be used to determine the status of normal operating parame- ters for the card.

Plug-In Digital I/O	Status
Card LEDs
Red D1 (Out 1)	ON: Relay Output 1 is On
Red D4 (Out 2)	ON: Relay Output 2 is On

Table 4-2- LED Status for Plug-In Digital I/O Card

4.3.5E2 RS485 Port Card (P/N

537-4890)

The E2 main board has two RS485 Network channels, allowing you to connect input and/or output boards via the RS485 Network. This optional card adds a second RS485 port (COM4) to the E2, allowing a connection to the ISD compressors, Control Link devices, and other supported MODBUS devices.

The plug-in RS485 Network card connects to the power interface board between the two fixed RS485 I/O Network connectors and the battery.

4.3.5.1LEDs

The plug-in RS485 Network card LEDs can be used to determine the status of normal operating parameters for the card.

RS485 Plug-In	Status
Card LEDs
Yellow D5 (RX1)	ON: Communication is being
	received on RS485 Port 2A
Yellow D2 (RX2)	ON: Communication is being
	received on RS485 Port 2B
Red D1 (TX)	ON: Communication is being
	sent on RS485 Port 2A and
	2B

Table 4-3- LED Status for RS485 Plug-In Card

4.3.6Plug-In Four-Channel Inter- nal Repeater

The four-channel repeater (P/N 832-4830)boosts sig- nal strength on Echelon Networks. However, the four- channel repeater is also useful as a means of connecting the E2 to its associated devices using more than one daisy chain.

With a four-channel repeater mounted in the E2, you can run as many as three daisy chain segments out into the field, each of which can be as long as the prescribed Eche- lon maximum wire length. The fourth channel of the repeater can be used to connect other E2s in a separate daisy-chain, eliminating the need to run cable from the field back to the next E2.

The plug-in Four Channel Internal Repeater card con- nects above the power interface board on the case mounts using standoffs and screws.

See Section 3.4.2.3, Mounting the Four-Channel Repeater for more information.

4.4Battery Testing and Replacement

WARNING: Fire, explosion, and severe burn hazard. Do not recharge, disassemble, heat above 212°F (100°C) incinerate, or expose contents to water.

Battery replacement should only be performed by a qualified, trained technician.

The 3.6V battery located on the E2 processor board protects log and alarm data during power loss. It is very important that each active E2 unit have a battery, and therefore the E2 has several features that warn you of low

Battery Testing and Replacement E2 Hardware Setup • 4-5