ABB Endura APA592 Operating Instruction page 93

Endura APA592
pH / Redox (ORP) transmitter
Output
Signal
Configurable
Dynamic range
Minimum Span
1 pH / 100mV
Maximum Span
14 pH / 3000 mV
Damping
Adjustable 0.0 to 99 seconds
Power Supply (Polarity Safe)
Supply Voltage
U = 12 to 42 V DC (Non-intrinsically safe installations)
s
U = 12 to 30 V DC (Intrinsically safe and Ex ia installations)
s
Maximum Permissible Ripple
Maximum ripple for supply voltage during communication in accordance with HART FSK physical layer specification,
version 8.1 (08/1999) section 8.1
Under-voltage Protection
U < 12 V results in I
Terminal-Mu
Maximum Load
Rload = (supply voltage – 12 V) / 22 mA
Max. load  depending on supply voltage (V DC)
1360
1000
795
B

B
500
225
C
C
12 17
A
APA592 transmitter
B
APA592 in Ex ia Design
C
HART communication – resistor
Fig. 10.1 Maximum Load
OI/APA592–EN Rev. E
4 to 20 mA (standard with HART)
User-programmable linear and non-linear across the entire range
3.9 to 20.75 mA
(3.8 mA = low alarm level, 21.5 mA = high alarm level)
= 3.8 mA
a
A
A
V DC
42
20 30 40
10 Specification
91