Unit installation

MAC 10
®
LEDC
4x4 Fan Filter Unit
9Innovators in Clean Air Technology | www.envirco.com | Operation & Maintenance
Installation & Service Manual
Manual Control Mode:
In Manual control mode, the motor speed is set using the onboard potentiometer. Onboard potentiometer rotation is CW to increase
the motor output.
Analog Control Mode:
In ANALOG control mode, the motor output is set using an external 0-10 VDC demand signal.
Network Control Mode:
In NETWORK control mode, the motor output is set using MODBUS Register 2. Motor output is specied as a value from 0 to 100
representing a percentage of motor torque output. Each ENV1028 in a MODBUS network must be set to a unique address. The
address value is set in binary format using the eight DIP switches of switch bank (S2). A maximum of 200 ENV1028 devices is
recommended per local area network(LAN). If an Envirco ACC Control Console is the MODBUS master, then addresses should be
assigned within the address range supported by the Control Console. Address zero should not be used as it is reserved for global
commands. Address switch settings are only checked by the ENV1028 at power-up. Power must be cycled (OFF/ON) before any
changes take effect.
1
2
ON ADE02
1 3 4 5 6 7 8
O
N
2
Control Mode
DIP Switches
S1
Addess DIP Switches
S2
Note: Network mode can be congured using either DIP switch setting shown above. DIP switch pictorials are for
reference and may be labeled differently by the manufacturer.
Registers relevant to this mode:
• Register 1 “Start/Stop” (R/W)
– To enable motor, write a value of 1; To disable motor, write a value of 0
• Register 2 “Motor Set Speed” (R/W)
– Motor Target speed value. Values may be written from 0 to 100
• Register 6 “RPM” (R)
– Motor RPM. Read from the motor
• Register 12 “Actual Motor Speed Instruction” (R)
– Speed control signal applied to the motor by the ENV1028.
(R/W) = Read/Write, (R) = Read Only
Example of binary S2 switch settings
12345678
ON DIP
1

12345678
ON
DIP
11

12345678
ON
DIP
21
12345678
ON DIP
2
12345678
ON
DIP
12
12345678
ON
DIP
22
12345678
ON DIP
3
12345678
ON
DIP
13
12345678
ON
DIP
23
12345678
ON DIP
4
12345678
ON
DIP
14
12345678
ON
DIP
24
12345678
ON DIP
5
12345678
ON
DIP
15
12345678
ON
DIP
25
12345678
ON DIP
6
12345678
ON
DIP
16
12345678
ON
DIP
26
12345678
ON DIP
7
12345678
ON
DIP
17
12345678
ON
DIP
27
12345678
ON DIP
8
12345678
ON
DIP
18
12345678
ON
DIP
28
12345678
ON DIP
9
12345678
ON
DIP
19
12345678
ON
DIP
29
12345678
ON
DIP
10
12345678
ON
DIP
20
12345678
ON
DIP
30
