Q1 Expansion Module

The Q1 expansion module is one of the expansion modules available for the RMC75. It has one quadrature input for 5 V differential A and B signals. The Q1 also has a high-speed Reg input that can be used for homing or registration of the quadrature input. Each RMC75 can support up to 2 Q1 modules.

The Q1 is typically used for a reference input from a quadrature encoder. Example applications include providing position a board on a flying cut-off application or the position of a belt on material handling applications.

One quadrature encoder can typically output its A and B signals to thirty-two (32) RMC75 Q1 modules. See the Q1 Wiring topic for details.

Maximum Number of Q1 Modules

The RMC75 can support at most two Q1 modules.

Features

One 5V RS-422 Quadrature input
One high-speed registration input for registration or homing

Uses

Encoder Reference Input
Reference inputs are often used as gearing or camming masters. Reference inputs cannot be used for direct control of the input axis.
Input for a Control Axis
The Q1 input can be used for the input of a control axis. The Control Output must be from an axis module.

Specifications

General
Weight	99 g
Quadrature Interface
Inputs	5V differential (RS422) receiver, Quadrature A, B
Input Impedance	16 kΩ unterminated 249 Ω terminated (selectable by jumpers)
Max. Encoder Frequency	8,000,000 quadrature counts/second
Common Mode Input Range	-10 V to +13.2 V
Absolute Max Voltage	±25 VDC. Applying greater than ±25 V will damage the receiver chip and will require repair by Delta. Notice that the quadrature input is not compatible with 24 V signals.
Daisy-Chaining	Daisy-chain one encoder to a maximum of 32 Q1 modules
Reg Input
Input Characteristics	12-24 VDC, sinking or sourcing
Logic Polarity	True High
Min Turn-On Voltage	5.75 V
Min Turn-On Current	1.25 mA
Max Turn-On Voltage	6.5 V
Max Turn-On Current	2.0 mA
Max Input Voltage	26.4 VDC
Max Input Current	2.6 mA at 24 V
Reg Input Response Time	40 µs

LEDs

Quad LED
This LED represents the input and control status for the axis. This bi-color (red/green) LED has the following states:

State	Description
Steady Off	No power or this input is not assigned to an axis.
Steady Green	The axis is either in closed loop control or is a reference axis. The axis is not halted.
Flashing Green	The input is in open loop and the axis is not halted (not possible for reference axes).
Flashing Red	A Closed Loop Halt or External Halt has occurred because an error bit is set (not possible for reference axes). The LED will not turn red due to a halt caused by halt command.
Steady Red	An Open Loop Halt or Direct Output Halt has occurred because an error bit is set (for reference axes, any halt has occurred). The LED will not turn red due to a halt caused by halt command.

Reg LED
This LED represents the physical state of the registration (Reg) input:

State	Description
Off	The RMC75 has no power, or the "Reg" input is off.
Steady Amber	The "Reg" input is on (current is flowing).