FEMA / Honeywell negative pressure switches VCM and VNM detect the pressure difference relative to atmospheric pressure. They are created to monitor vacuum of non-aggressive liquids and gaseous media....
FEMA / Honeywell negative pressure switches VCM and VNM detect the pressure difference relative to atmospheric pressure. They are created to monitor vacuum of non-aggressive liquids and gaseous media.
Product comparison
| Type | Setting range | Switching differential | Max. pressure |
| VCM095 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM095-206 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM095-213 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM095-301 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM095-303 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM095-513 | -0.9 …+0.5 bar | 50 mbar | 3 bar |
| VCM101 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-205 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-206 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-211 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-213 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-301 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-303 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-351 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-363 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM101-513 | -1 … +0.1 bar | 45 bar | 3 bar |
| VCM301 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-206 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-213 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-305 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-306 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-313 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-351 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM301-513 | -250 … +100 mbar | 45 bar | 3 bar |
| VCM4156 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-205 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-206 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-213 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-301 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-351 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-363 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-513 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCM4156-576 | -15 … +6 mbar | 2 mbar | 1 bar |
| VCMV095 | -0.9 …+0.5 bar | 90-400 mbar | 3 bar |
| VCMV101 | -1 … +0.1 bar | 80-350 mbar | 3 bar |
| VCMV301 | -250 … +100 mbar | 30-200 mbar | 1.5 bar |
| VNM111 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNM111-213 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNM111-313 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNM111-351 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNM111-513 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNM301 | -250 … +100 mbar | 45 bar | 3 bar |
| VNM301-206 | -250 … +100 mbar | 45 bar | 3 bar |
| VNM301-211 | -250 … +100 mbar | 45 bar | 3 bar |
| VNM301-213 | -250 … +100 mbar | 45 bar | 3 bar |
| VNM301-303 | -250 … +100 mbar | 45 bar | 3 bar |
| VNM301-513 | -250 … +100 mbar | 45 bar | 3 bar |
| VNMV111 | -1 … +0.1 bar | 50 bar | 6 bar |
| VNMV301 | -250 … +100 mbar | 45 bar | 3 bar |
Add the type numbers below to the listed type numbers for extra functionality as described
-301: terminal connection housing, IP65
-307: two microswitches, switching in parallel or in succession, fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
-217: two microswitches, 1 plug, switching in succession, adjustable switching interval (with the exception of VCM4156)
-213: gold-plated contacts, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA. And others not available with adjustable switching difference.
-351: protection class IP65 and switching housing with surface protection (chemical version)
-513: gold-plated contacts, switching differential permanent, IP65, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA; suitable isolating switching amplifier necessary, degree of protection Ex-i.
-301: terminal connection housing, IP65
-307: two microswitches, switching in parallel or in succession, fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
-217: two microswitches, 1 plug, switching in succession, adjustable switching interval (with the exception of VCM4156)
-213: gold-plated contacts, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA. And others not available with adjustable switching difference.
-351: protection class IP65 and switching housing with surface protection (chemical version)
-513: gold-plated contacts, switching differential permanent, IP65, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA; suitable isolating switching amplifier necessary, degree of protection Ex-i.
All data relating to the switching pressure ranges and thus also the scale divisions on the switching devices are to be understood as the difference in pressure between the relevant atmospheric pressure and the set switching pressure. The “zero” reference point on the scale of the unit corresponds to the relevant atmospheric pressure.
Parameter
Value
Kind of pressure
vacuum, relative
Pressure connection
internal thread G¼, external thread G½
Electrical connection
Plug DIN EN 175301
Plug DIN EN 175301
IP54
Housing material
rugged housing of seawater resistant aluminium die casting GD Al Si 12.
Media temp.
-25 ... 70°C
Media temp. limit
temperatures up to 85°C are allowable for short periods. Higher temperatures are possible, provided that the limit is safeguarded by suitable measures (e.g. water tube trap, see Accessories for Pressure Switches / Transmitters)
Ambient temperature
-25 ... 70°C
Ambient temp. limit
at temperatures below 0°C, ensure that no water condensation can arise in the sensor and in the switching device
Switch function/capacity
SPDT Microswitch 250 VAC; capacity 5 A inductive, 8 A resistive
Optional functions
add the type numbers below to the listed type numbers for extra functionality as described
• 301: terminal connection housing, IP65
• 307: two microswitches, switching in parallel or in fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
• 217: two microswitches, 1 plug, switching in succession,
adjustable switching interval (with the exception of VCM4156)
• -213: gold-plated contacts, switching capacity: max. 24 VDC,
100 mA, min. 5 VDC, 2 mA. And others not available with
adjustable switching difference.
• -351: protection class IP65 and switching housing with surface
protection (chemical version)
• -513: gold-plated contacts, switching differential permanent,
IP65, switching capacity: max. 24 VDC, 100 mA, min. 5 VDC,
2 mA; suitable isolating switching amplifier necessary, degree of
protection Ex-i
• 301: terminal connection housing, IP65
• 307: two microswitches, switching in parallel or in fixed switching interval, terminal connection case (with the exception of VCM4156), IP65
• 217: two microswitches, 1 plug, switching in succession,
adjustable switching interval (with the exception of VCM4156)
• -213: gold-plated contacts, switching capacity: max. 24 VDC,
100 mA, min. 5 VDC, 2 mA. And others not available with
adjustable switching difference.
• -351: protection class IP65 and switching housing with surface
protection (chemical version)
• -513: gold-plated contacts, switching differential permanent,
IP65, switching capacity: max. 24 VDC, 100 mA, min. 5 VDC,
2 mA; suitable isolating switching amplifier necessary, degree of
protection Ex-i
Certificates
SIL2 according IEC 61508-2
