Tyco MX4428 technical manual 814RB Relay Base

MX4428 MXP Engineering / Technical Manual		Document: LT0273
Device Information and Programming
3.13	814RB RELAY BASE

3.13.1GENERAL

The 814RB detector base is designed as a low cost output device. The relay is controlled by the detector which is plugged into the base, but the operation of the relay can be quite separate from the operation of the detector. (Refer to section 3.3.)

The 814RB Relay Base provides two sets of volt-free, change-over contacts capable of switching ancillary equipment rated at up to 1A resistive @ 30Vdc. One set is labelled NO, C, NC (for normally open, common, and normally closed.) The other set is labelled 1 for NC, 2 for C, and 3 for NO. The terminals accept a single cable of up to 2.5 sqmm. Relay operation is controlled by the MX4428 via an output from the detector. Hence, a detector must be fitted to the base in order for the relay to operate as the relay base does not have its own address.

The 814RB may be plugged into a MUB standard base, 5B standard base, or 5BI isolator base, or mounted directly on the ceiling or wall.

3.13.2SPECIFICATIONS

Line Connections	L(–), L1(+)
Remote LED Connection	R(–), L1(+)
Supply Voltage	20Vdc - 40Vdc
Supply Current	50uA (typical quiescent)
	100uA (output active)
Relays	Two changeover volt-free contacts
	Switching current: 1A @ 30V dc
	Resistance: On: 50mΩ Off: > 1 x 109Ω .
	Switching time: <10ms
	Life expectancy: 100,000 operations
Dimensions	110mm (diameter) x 37mm (excluding detector)
Weight	153g

3.13.3WIRING

Refer to Figure 3.3 for details of the relay terminals. Loop wiring and remote LED wiring is the same as the MUB, refer to Figure 3.1. Contact wiring connects to the following terminals

First Pole	NC	Normally Closed
	C	Common
	NO	Normally Open
Second Pole	1	Normally Closed
	2	Common
	3	Normally Open

Page 3-28 24 March 2006 Issue 1.5