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5.4.2.
W
IRING AND CONNECTIONS
All wiring and connections must be done in accordance with EN/IEC 60079-14, EN/IEC 61241-14 and/or local and national codes
for hazardous area installations.
5.4.3.
A
LLOWABLE SUPPLY VOLTAGES
Electrical connections on terminal board must respect po and –, as well as maximum allowable supply voltages given
below. Connect the instrument to the ground using the ground terminals internally and externally to the case.
Supply Voltage
U (VDC)
AO_1
AO_2
DO_1/DO_2
MIN
MAX
MIN
MAX
MIN
MAX
Explosion proof
10 V
40 V
10 V
30 V
0.5 V
30 V
Intrinsic Safety
10 V
30 V
10 V
30 V
0.5 V
30 V
5.4.4.
M
AXIMUM POWER
3 W into 12400 case
5.4.5.
O
UTPUT SIGNAL AND LOAD RESISTANCE
♦
AO_1 and AO_2
Response (scan) time: <60ms
Power interruption without causing reset: <100ms
Power-Up time: < 1s
Compliance with NAMUR NE-43 specification
standard level measurement: 3.8mA to 20.5mA
Low or high failsafe signals (severe fault): < 3.6mA or > 21mA
♦
Maximum load resistance
For AO_1 and AO_2: R max (
Ω
) = U (V) – 10 (V)
Imax (A)
♦
DO_1 and DO_2
There are two independent isolated output switches with open collectors. 1A maximum output signal. A load resistance must
be used in series to limit maximum current. 30 VDC across switch terminals and 1 A cannot exist simultaneously; doing so will
result in failure of the digital output circuit.
Figure 8 – Terminal board
Standard version with clamp (Ref. #90)
Figure 9 - Terminal board
Japanese version with screws (Ref. #90A)
R
load
U
Figure 10