Chromalox 1604-7 user manual Serial Interface, Power Line Wiring

SERIAL INTERFACE

RS-485 interface allows to connect up to 30 devices with one remote master unit.

I		A/A'	A'/A
N
	11			M
S
				A
T
		B/B'	B'/B	S
R
	12
U				T
				E
M		COMMON
				R
E
	13
N
T

Fig. 11 - RS-485 WIRING

The cable length must not exceed 1.5 km at 9600 BAUD.

NOTE: The following report describes the signal sense of the voltage appearing across the interconnection cable as defined by EIA for RS-485.

a)The ” A ” terminal of the generator shall be negative with respect to the ” B ” terminal for a binary 1 (MARK or OFF) state.

b)The ” A ” terminal of the generator shall be positive with respect to the ” B ” terminal for a binary 0 (SPACE or ON) state.

D) POWER LINE WIRING

		N
4
		POWER LINE 100 V to 240 V A.C
		(50/60Hz)
		or 24 V AC/DC
5		R (S,T)			(S,T)	N
Fig. 12 POWER LINE WIRING					R
NOTES:
1)	Before connecting the instrument to the power
	line, make sure that line voltage corresponds to
	the description on the identification label.
2)	To avoid electrical shock, connect power line at
	the end of the wiring procedure.
3)	For supply connections use No 16 AWG or larger
	wires rated for at last 75 °C.
4)	Use copper conductors only.
5)	Don’t run input wires together with power cables.
6)	For 24 V DC the polarity is a do not care condition.
7)	The power supply input is NOT fuse protected.
	Please, provide it externally.
		Power supply	Type	Current	Voltage
		24 V AC/DC	T	500 mA	250 V
		100/240 V AC	T	125 mA	250 V
	When fuse is damaged, it is advisable to verify
	the power supply circuit, so that it is necessary to
	send back the instrument to your supplier.
8)	The safety requirements for Permanently Con-
	nected Equipment say:
	- a switch or circuit-breaker shall be included in

the building installation;

- It shall be in close proximity to the equipment and within easy reach of the operator;

- it shall be marked as the disconnecting device for the equipment.

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1604-7-1-AB.p65 7 5/16/00, 10:50 AM