1 Technical Specifications
Page 4 Mk8 MM Expansion Features Installation and Set-Up Guide 04.09.2016
1.4 Expansion Board Terminals Description
S All terminals marked S are internally connected. They are provided for connections
to the various screened cables.
P- 0V supply to top blowdown and feed water servomotors
FW Signal from feed water servomotor, indicating position
P+ +12V supply to top blowdown and feed water servomotors
- Common for terminals T1, T2 and T3
T1 Signal input from T1 temperature sensor
T2 Signal input from T2 temperature sensor
- Common for terminal T1, T2 and T3
T3 Signal input from T3 temperature sensor
TW Signal from top blowdown servomotor, indicating position
F- Common for terminals MF and CF
MF Current input, 4-20mA for cold water make up flow meter
CF Current input, 4-20mA for condensate return flow meter
I+ Current output, 4-20mA to feed water VSD
V+ Voltage output, 0-10V to feed water VSD
IV- Common for terminals I+ and V+
EX- Common for terminal EX+
EX+ Current input, 4-20mA for external water level probe or fuel flow feedback
DT+, DT- Digital communications from draught control pressure sensor
DP- 0V supply to draught control pressure sensor and draught control servomotor
DP+ +12V supply to draught control pressure sensor and draught control servomotor
DPW Signal from draught control servomotor, indicating position
5T+, 5T- Digital communications from bottom blowdown module and 2
nd
low probe
4P- 0V supply to 2
nd
low resistance probe
4P+ +12V supply to 2
nd
low resistance probe
6T+, 6T- Communications port connections I/O module RS485
3P+ +9V supply to TDS probe
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