Brooks Instrument 5851EM - Manual (Page 23)

2-9
Brooks ® Models 5965, 5851EM
Section 2 Installation Installation and Operation Manual
X-TMF-5965-5851EM-MFC-eng
Part Number: 541B122AAG
September, 2009
Grounding the valve test point pin willcause the valve to open fully
regardless of command input voltage. Note: For normally open valves
grounding this pin will cause the valve to fully close.
Valve Off
Refer to Figures 2-1, 2-2 and 2-3.The control valve can be forced closed
regardless of command input signal by applying a TTL level low (<0.4 Vdc)
to Terminal L of the Card Edge version or Pin 4 of the D-Connector
version. A TTL level high or floating at this pin has no effect.
Figure 2-5 Common Electrical Hookups Current I/O Version