Honeywell W7750A specifications Jack

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

2-1/8

(54)

31		30	29	28	27	26	25	24	23	22	21	20	19	18		17		16
							VAC	VAC	1	2	3	4	5		A0		A0	A0	5-5/8
		DI			DI			24											(143)
	DI-4 GND DI-3 DI-2 GND					DI-1 24		COM OUT OUT OUT OUT OUT						1		2		3

E	LED	BYPASS SNSR		AI	SET PT	AI-1	AI	AI-2	AI-3 AI AI-4			20VDC	LONWORKS		LON
GND				GND		OHM GND OHM V/mA GND V/mA						OUT		BUS	JACK	3-1/16
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	J3	(77)
					5-3/16 (132)
									6 (152)

M17490

Fig. 7. W7750B,C construction in in. (mm). W7750C (shown) has three 4 to 20 mA analog outputs.)

Communications:

The W7750A,B,C Controller uses a Free Topology Transceiver (FTT) transformer-coupled communications port running at 78 kilobits per second (kbps). Using the transformer-coupled communications interface offers a much higher degree of common-mode noise rejection while ensuring dc isolation.

Approved cable types for LONWORKS Bus communications wiring is Level IV 22 AWG (0.34 mm2) plenum or nonplenum rated unshielded, twisted pair, solid conductor wire. For nonplenum areas, use Level IV 22 AWG (0.34 mm2) such as U.S. part AK3781 (one pair) or U.S. part AK3782 (two pair). In plenum areas, use plenum-rated Level IV, 22 AWG (0.34 mm2) such as U.S. part AK3791 (one pair) or U.S. part AK3792 (two pair). (See Tables 9 and 11 for part numbers.) Contact Echelon Corp. Technical Support for the recommended vendors of Echelon approved cables.

74-2958— 1 16