3-2 L/S Precision Variable-Speed Drives Operating Manual Masterflex
Section 3
Operation
External Operation
Bench top models are equipped with inputs that can be controlled by
external signals connected at the rear panel 18-pin round connector. The
external inputs permit control of the pump by remote equipment or
accessories. Figure 3-1 indicates the signal locations in the connector.
Figure 3-1. 18-Pin Connector Configuration with Wiring Scheme
Description Pin No.
Speed Control Voltage Input (0–10V) (+) input 1 (black)
Speed Control Current Input (4–20 mA) (+) input 3 (white)
Speed Control Input Reference Common 5 (orange)
Local/Remote Speed Control 14 (red/yellow)
Local/Remote Speed Control Reference 10 (grey)
Start/Stop and CW/CCW Reference 8 (yellow)
Start/Stop (+) Control 4 (green)
CW/CCW 6 (blue)
Chassis (Earth) Ground 9 (violet)
NOTE: Colors are those of the Remote Cable, Cat. number MN-77300-32.
Keypad Lockout
Enable/Disable
Press and hold the INT/EXT key. After five (5) seconds, display will
change to all dashes. Release INT/EXT key and press UP ARROW key (▲)
five (5) times. Repeat this process to unlock the keypad. When the keypad
is locked out, display will change to display all dashes (- - - - -) when a key
is depressed.
Note: Jumpers “A” and “B” are optional. See page 3-3 External Inputs for
correct usage.
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