
Mounting and Installation
Page 45 of 102
Figure 59 Dual mA Output Connections
6.3.16 Dual 4-20mA Output Driver
Two outputs fully isolated from each other and from the mother board.
Output open loop alarm; Maximum load of 450ohm @ 21.5mA, 480 ohm @20.5mA. Drive voltage maximum; 18VDC open
circuit. We recommend a maximum length of 1,000 feet using 22 AWG wire or larger. Twisted, shielded, stranded cable is
best for long distances.
Does not have a passive output. The loop is powered by the driver card.
Scale to any engineering units, forward or backward.
Examples:
4mA = 200 GPM and 20mA = 0 GPM
4mA = 32⁰F and 20mA = 212⁰F
4mA = -500mV and 20mA = 500mV
Can be used for proportional control of a pump or analog valve.
Can be used as a process variable to a DCS or chart recorder.
The dual 4-20mA output driver is equipped with onboard power which is used to
power or excite, the output loops. Therefore, the input device must not power the
loop. mA loops cannot be powered from two sources!
Table 11 Dual mA Output Connections
Figure 60 Dual mA Output with
Prominent Universal Control
Cable on output 1.
Figure 58 Dual 4-20mA
Output driver
Содержание Aegis-II
Страница 26: ...Mounting and Installation Page 26 of 102 Figure 14 Aegis II overall location of major components ...
Страница 27: ...Mounting and Installation Page 27 of 102 Figure 15 Aegis II motherboard general arrangement ...
Страница 28: ...Mounting and Installation Page 28 of 102 Figure 16 Main PC board Input Wiring diagram ...