Emerson E2 operation manual 6 4AO Analog Output Board, 15- 4AO Analog Output Board P/N

2.2.64AO Analog Output Board

The 4AO Analog Output Board (P/N 815-3030) (Fig- ure 2-15) is configured with four analog output connec- tions that provide a variable voltage signal to any of four analog devices that may be controlled by a single E2. Two 4-20mA outputs are provided for channels 1 and 2. The

4-20mA outputs provide a variable current for applications that are either externally powered or that require power from the 4AO board.

		9
4
5
7	8
Transmitting (TX ) and Receiving (RX) LEDs		Alarm and Status Indicator LEDs
	8	Analog Outputs (4)
	9	4-20mA Channels (2)
Hand-held Terminal (HHT) Jack
Figure 2-15- 4AO Analog Output Board (P/N 815-3030)

2.2.78DO Digital Output Board and PMAC II Anti-Sweat Controller

For control of anti-sweat heaters, Emerson Retail Solu- tions supplies the 8DO Digital Output board (P/N 810- 3050). The 8DO has eight outputs which may pulse up to 150mA at 12VDC.

Since the 8DO is primarily designed to control anti- sweat heaters, the 8DO is the heart of Emerson Retail Solutions’ Pulse Modulated Anti-Sweat Control (PMAC

II)panel. The PMAC II (P/N 851-1000) provides 16 chan- nels of anti-sweat control circuitry. The PMAC II panel combines the 8DO with high-capacity relays in a single enclosure, providing 256 total amps of anti-sweat heater operation.

The 8DO is shown in Figure 2-16. The PMAC II is shown in Figure 2-17.

Figure 2-16- 8 DO Digital Output Board

Figure 2-17- PMAC II Anti-Sweat Control Panel

I/O Network Boards and Peripherals Hardware Overview • 2-9