Mounting and Wiring VMA1400 Series Controllers Technical Bulletin
7
Table 1: Actuator VA Power Rating
Actuator Type Power Rating
VA-8020
Incremental 4 VA
VA-8050
Incremental 6 VA
VA-7150
Incremental 2.7 VA
VA-7153
Incremental w/feedback 2.7 VA
J Series Electric Zone Valve
On/Off 7 VA
VA-8022
Voltage (0 to 10 VDC) 4 VA
VA-8052
Voltage (0 to 10 VDC) 6 VA
VA-7152
Voltage (0 to 10 VDC) 4.7 VA
VA-7200
Incremental 6.7 VA
VA-7203
Incremental w/feedback 6.7 VA
VA-7202
Voltage (0 to 10 VDC) 8.7 VA
GE RR-7 or Touchplate
Lighting relay 42 VA for 50 ms *
VA-7450
Incremental 2.5 VA
VA-7452
Voltage (0 to 10 VDC) 2.5 VA
VA-7040
Thermal (DAO) 3 VA
VA-7310
Incremental 2 VA
VA-7312
Voltage (0 to 10 VDC) 2 VA
VA-7010
On/Off 7 VA
M9104-AGA-2N
Incremental 3.4 VA
M9104-AGA-2
Incremental w/conduit 3.4 VA
M9104-AGS-2N
Incremental w/DPT-2015 3.4 VA
M9104-GGA-2
Proportional 0-10V 5 VA
M9104-GGC-2
Proportional 0-10V
w/conduit
5 VA
* Do not schedule all lights on one transformer to turn on at the same time. The
current surge on the transformer could open the circuit breaker.
When using a single transformer to power multiple VMAs, use a wire
gauge large enough to handle the current and minimize the voltage
drop. The voltage drop depends on the current draw, wire gauge, and
wire length. On a fully loaded 100 VA transformer, a 120 VAC
primary draws only 0.8 amperes, while the 24 VAC secondary draws
4 amperes.
The standard 2.5 mm
2
(14 AWG) cable (Example 1 in Figure 1) is
limited to 27m (88 ft) with ten cooling-only VMAs, all at one end of
the cable. If the transformer is centered (Example 2 in Figure 1) with
five VMAs on the left and five VMAs on the right, the distance in
each direction can be increased. This is because both the current
and voltage drop are halved. In this example, both the left and the right
legs could be increased to 54m (176 ft) from the transformer
(50 VA from each leg), creating a 108m (352 ft) total length.
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