HA249928
Issue 15 Jly 06
Page 22
100 MM RECORDER USER GUIDE
NC C NO NC C NO NC C NO
Ch4
relay 1
Ch4
relay 2
Ch5
relay 1
NC C NO NC C NO NC C NO
Ch5
relay 2
Ch6
relay 1
Ch6
relay 2
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
Input board
NC C NO NC C NO NC C NO
Chan. 1
relay 1
Chan. 1
relay 2
Chan. 2
relay 1
NC C NO NC C NO NC C NO
Chan. 2
relay 2
Chan. 3
relay 1
Chan. 3
relay 2
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
Option board No 1
Option board No 3
Option board No 4
Option board No 2
10
20
30
40
50
100
200
300
0.1 0.2
0.5
5
20
Max. DC load breaking capacity
1
2
inductive load
(L/R = 20msec)
resistive load
DC Voltage (Volts)
DC current (Amps)
Figure 4.1a
Figure 4.1b
F1
F2
1
0.8
0.6
0.4
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
F
Reduction Factor F
Power factor (cos
φ
)
4 OPTIONS
Up to four 1/2-width option boards can be fitted, as specified at time of order (i.e. options are not retro-fittable).
4.1 RELAY OUTPUTS
The relay output option comes in three versions, each of which uses a 1/2 - width circuit board. The relay specifica-
tion for resistive loads is as given below. For inductive ac loads, contact life = resistive life x reduction factor in figure
4.1a, in which F1 = measured on representative samples; F2 = typical values (according to experience)
Maximum ac switching power
500 VA
Maximum ac contact voltage
250V within the VA rating above
Maximum ac breaking current
2 A, within the VA rating above.
Maximum dc power/voltage/current
See figure 4.1b.
Isolation (dc to 65Hz; BS EN61010)
Installation category II; Pollution
degree 2 (See specification section
for definitions)
Contact to contact
300V RMS or dc (double insulation)
Contact to ground
300V RMS or dc (basic insulation)
Estimated life
30,000,000 operations
Each recorder channel has two alarm thresholds (alarm 1 and alarm 2),which can both be either absolute high or abso-
lute low as defined at time of order. If the channel's value lies above a high threshold, the relevant relay for that
channel alarm is active. If the channel's value lies below a low threshold, the relevant relay for that channel alarm is
activated.
Notes:
1.
The default hysteresis value of 1% can be edited as a part of the instrument configuration (HySt). This value is a
percentage of channel scale, and applies to all thresholds.
2.
The relays are de-energised in alarm and power off conditions, to provide fail-safe operation.
4.1.1 Three change-over relays board
This 1/2 board provides three change-over relays (i.e. with common, normally open and normally closed contacts).
In alarm, the common and normally closed contacts are closed. Wiring details for up to 12 relays is shown in figure
4.1.1.
Figure 4.1.1 Changeover relay wiring (alarm / power off state)
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