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SV2 Series Safety Shut-off Valves
210
32-00029—02
Category
Item
Picture
Maximum Tightening
Torque
Nm
In-lbf
Valve body
Pressure access location
cover
M37175
1.36-1.81
12-16
Pressure access port plug,
1/8 in (3mm) NPT or BSP
-001
M37176
6-8
53-71
NOVV plug ¾ in NPT
1 in (DN25) valves
M37177
72-88
637-779
(53-65 ft-
lbf)
Chassis ground wire
(underneath solenoid cover)
MCR37178
4-5
35-44
MODBUS COMMUNICATION ADDRESSING
Honeywell SV2 Series valves include a Honeywell specific secure Modbus protocol. Standard Modbus RTU protocol is used,
however, safety-related and writable parameters are covered by a secure layer. As a result, they are only writable when accessed
using a valid user access level and appropriate user interfaces, which are designed to work with the secure layer. The Modbus
addresses shown in this section are readable only.
Table 28.
Supported Function Description
Function Code
Read input register
4
Read holding register
3
Write single register
6
Write multiple registers
16
Read SV2 Series valve status (refer to
Tables 29
,
30
and
31
)
17