Advant Controller 31 Series 40 and 50

2 central extensible remote units with analog extensions or - a mixed digital/analog

 configuration within the permissible limits

1.3 Power cuts or drops, battery

The 40 and 50 series basic units provide an incorporated battery buffer in order

 to save the necessary information for the next startup should there be a power

 drop or cut. The buffer battery is an usual in the trade Vanadium Lithium accum

ulator. It is soldered on a printed-circuit board inside the unit and qualified perso

nnel can exchange it by themselves. The accumulator is 100 % charged after 1

2 operating hours without interruption. Its lifetime is between 6 and 15 years; it 

depends on how often and how long the power supply of the unit is switched off.

 The battery buffer time is 20 days at 25 °C. During that time data (e.g. flags) can

 be stored with power supply of the unit switched off. The status word %IW 1062

.15 (EW 62,15), Bit 3 gives information on the status of the battery (0 correspond

s to error, 1 corresponds to OK). Caution: The following operating instructions are t

o be observed: • Never short-circuit or operate battery with the polarities reversed!

 They are likely to overheat and explode. Avoid chance short circuiting and therefor

e do not store batteries in metal containers and do not place them on metallic surfa

ces. Escaping lithium is health hazard. • Replace battery only with power supply on.

 Otherwise data may be lost. • Dispose of battery environmentally consciously! To sa

ve all or part of the data prior configuration of the basic unit is required (refer to volu

me 2 - System Technology). If the configuration of the basic unit is absent then all f

unctions and internal data will be reset to 0 after power cut.

3.1.3 Earthing 3.1.3.1 Basic earthing principles Use rigid wires or multi-con

ductor wires AWG 14 (1.95 mm2 ) or bigger diameter. The earth and mains

 wires should be connected in star. All AC31 components of a cabinet shou

ld be connected to the same earth. When the remote units are situated ou

tside the cabinet they should be connected to the nearest earth. The 40 an

d 50 series basic units are fitted with an earth plate with the DIN rail mount

ing system. Also, if the basic unit is screwed directly to a metal plate, the sc

rew located at the top left of the basic unit (as seen from the front) ensures

 an electrical connection to the earth via the earth plate. This earthing ensur

es protection against electromagnetic disturbances. The safety earthing cabl

e (on terminal block) should be connected to the cabinet chassis. 3.1.3.2 Ea

rthing principles for several cabinets When the cabinets are close to each oth

er the different earths should be connected together using a cable with a cro

ss section of at least 16 mm² (see Figure 3- on page 4-3). The noise genera

ting devices (actuators, motors, etc.) should not be earthed in-between two 

. The earthing should be done near to the element causing the most disturb

ance (see Figure 3-2).