Brooks Instrument SLA5800 Series - Manual (Page 12)

1-6
Brooks ® Digital MFC's & MFM's
Section 1 Introduction Installation and Operation Manual
X-TMF-SLA5800-MFC-eng
Part Number: 541B027AAG
April, 2013
Alarm Output (Analog I/O versions only)
The Alarm Output is an open collector or "contact" type that is CLOSED
(on) whenever an alarm is active. The Alarm Output may be set to indicate
any one of various alarm conditions. Reference Section 3-6-2 for more
information on alarms.
Type: Open Collector
Max Closed (ON) Current: 25 mA
Max Open (OFF) Leakage: 1
μA
Max Open (OFF) Voltage: 30 Vdc
0.3 Vdc > VOR > 4.8 Vdc: Undefined
Valve Override Signal Specifications (Analog I/O Versions only)
Input Impedence: 800 k
Ω
Absolute Max. Input: -25 Vdc > VOR > 25 Vdc
(without damage)
5 Volt Reference Signal (Analog I/O versions only)
A 5 Vdc reference output is provided to the customer for use in generating
a setpoint and/or Valve Override signal. The current drive of this output is
very limited and must be used with care.
Min. Load Resistance:2 k
Ω (2.5 mA maximum)
Accuracy: +1.0%
Figure 1-2 General Wiring
Figure 1-1 Open Collector Alarm Output