Flex 12EX2 Standard, AB and Tandem Instruction Manual
November 2017
Page 44 of 56
5 Receiver Installation
5.1 Output Relay Contact Diagrams
5.1.1
Flex 12EX2 (dual speed model)
For 9 - 36VDC power supply, wire #1 corresponds to the negative charge (-), wire #3 corresponds to the
positive charge (+), and wire #2 is for GROUND.
If PB11 (or PB12) is set to A/B pushbutton select or A/B rotary switch select function (AB models), connect
output A to K21 relay (or K22) and output B to K23 relay (or K24).
See Section 4.1.9.2 on page 23
to set to this function.
Due to the possibility of voltage spikes on the contactors, suppressors are required on contactors being
driven by Flex relays.
5.2 Pre-installation Precautions
1. Make sure the transmitter and receiver have the same serial numbers and are set to the
same channel.
2. Make sure the receiver is not set to the same channel as any other systems in use in the
surrounding area.
3. Make sure the crane or equipment is working properly prior to installation.
4. Make sure the power source to the receiver is set correctly.
5. Switch off the main power source to the crane or equipment prior to installation.