User Manual – Rev BE    AMETEK Programmable Power 
MX Series  74 
  The Clock and Lock BNC connectors located on the rear panel are used to 
synchronize and control the phase shift between the three outputs when 3 units 
are operating as a three-phase clock and lock system. This mode of operation 
requires the -LKM (on Master unit) and -LKS (on Auxiliary units) options. See 
paragraph 3.10 for more information on this mode of operation. 
A set of two identical System Interface connectors, P8 and P9 is located on the 
rear panel of each MX chassis. The system interface is used to connect the 
multiple MX30 or MX45 power sources in a Master/Auxiliary configuration to 
create MX60, MX90 or MX135 models.  In these configurations, only the Master 
MX30 or MX45 power source has a built-in controller and front panel. 
The same connector is also used to control the optional OMNI-3-75 Reference 
Impedance. 
1 
OUTP:   Output ON. Controls state of output relay 
2 
N/ C 
3 
N/ C 
4 
N/ C 
5 
COM:   Common. Signal return. 
6 
OT:   Over temperature. Indicates over temperature condition. 
7 
N/ C 
8 
CLB:   Current Limit B. Programmed current limit reference for phase B 
9 
CS A:   Current Sum Phase A 
10 
CSC:   Current Sum Phase C 
11 
FLT A:   Amplifier Fault Phase A 
12 
FLT C:   Amplifier Fault Phase C 
13 
XFMR:   Optional voltage range select. (-HV o r  -XV option) 
14 
P ARALLEL:   Parallel operation control. 
15 
I NPUT ON:   Input power status 
16 
A ERR LO:   Error Signal Phase A, low 
17 
B ERR HI :   Error Signal Phase B, high 
18 
N/ C 
19 
C ERR LO:  Error Signal Phase C, Low 
20 
300 VRNG: 300 V AC Range Select 
21 
COM:  Common. Signal return. 
22 
/ REM OFF: Remote Off Control not 
23 
COM:  Common. Signal return 
24 
F LK/ B YP :  Flicker /  Bypass OMNI control 
25 
/ OVL:  Overload not 
26 
CLA:  Current Limit A. Programmed current limit reference for phase A 
27 
CLC:  Current Limit C. Programmed current limit reference for phase C 
28 
CSB:  Current Sum Phase B. 
29 
N/ C 
30 
FLT B:  Amplifier Fault Phase B 
31 
N/ C