AMETEK ReFlex - Manual (Page 296)

ReFlex Power™ Active Loads
M380056-01 Rev J 7-21
DC I NPUT P INOUT
Figure 7-7. DC Input Connector and Wiring Diagram
Table 7-3. DC Input Pinout and Wire Information
Pin Name Function Signal Level
Max Wire
Gauge
D DCIN INPUT:INPUT SOURCE
+500V; 500V, MAX TO
CHASSIS
8
B DCIN_RTN
INPUT: RETURN FOR INPUT SOURCE
DCIN
0V; 500V, MAX TO CHASSIS 8
C SNS INPUT; REMOTE SENSE FOR DCIN
+500V; 500V, MAX TO
CHASSIS
16
A SNS_RTN
INPUT REMOTE SENSE FOR
DCIN_RTN
0V; 500V, MAX TO CHASSIS 16
DC I NPUT C ONNECTOR A CCESSORIES
AMETEK P/N 5380452-01, Load Module, 9ft. Unterminated DC Input Cable
Assembly
R EMOTE S ENSE
Remote sensing is used to compensate for the voltage drop that
occurs across the wires connecting the source to the input of the
Active Load modules. A separate pair of wires is routed to measure
the voltage at the source terminals where precise measurement of the
output voltage is desired.
The remote sense leads are connected at the DC INPUT connector
on the front panel of the modules. Refer to the section, DC Inputs, for
information on connector pinout. Connect the SNS terminal to the load
terminal connected to the module DCIN terminal, and the SNS-RTN
terminal to the load terminal connected to DCIN-RTN terminal.
Special care is required in routing the sensing leads to prevent noise
pickup or coupling to the power leads; refer to the section, Noise and
Impedance Effects. The sense leads should be a twisted-pair of AWG
#16-20 wire, and may require shielding in high noise environments.
Connect the shield to the shield ground terminal, CHAS-GND, of the
DC INPUT connector, as required to maximize its effectiveness.