diff --git a/pel10_io.h b/pel10_io.h
index a457a72..bc667c7 100644
--- a/pel10_io.h
+++ b/pel10_io.h
@@ -7,6 +7,8 @@
 #include "nrf_gpio.h"
 #include "nrf_spim.h"
 
+#if (DEF_ELITE_MODEL == DEF_PULSE_E_LOAD_01)
+
 #define RELAY1_PIN        NRF_GPIO_PIN_MAP(1, 10)
 #define RELAY2_PIN        NRF_GPIO_PIN_MAP(1, 15)
 
@@ -55,5 +57,6 @@ void spim_xfer(uint32_t cs_pin,
                uint16_t rx_buffer_length);
 
 void pel10_io_init(void);
+#endif /* ! DEF_ELITE_MODEL */
 
 #endif // !__PULSE_E_LOAD10_H__